CN116122169A - Steel plate composite beam and construction method - Google Patents

Abstract

The invention relates to a steel plate composite girder and a construction method. The splicing of the main girder utilizes assembled steel beams to assemble tire frames; the binding of prefabricated bridge deck steel bars utilizes assembled type steel tire frames; a detachable bridge deck rapid formwork system is adopted; Prefabricated bridge deck accurate placement auxiliary device; wet joint reinforcement setting and positioning device; epoxy mortar precise laying device; self-made epoxy mortar scraper for quick application. The beneficial effects of the present invention are: the present invention is provided with assembled steel beams to assemble the tire frame, which is convenient for on-site assembly, and the main beams are arranged at intervals in the steel beam limit grooves of the lateral limit columns, which improves the assembly efficiency of steel beams and assembly accuracy; use horizontal and vertical combs to position the spacing of steel bars, which effectively reduces the difficulty of binding prefabricated bridge deck reinforcement; setting up prefabricated bridge deck positioning auxiliary devices improves the positioning accuracy of prefabricated bridge decks; setting The epoxy mortar laying device effectively improves the accuracy and efficiency of epoxy mortar laying.

Description

Steel plate composite beam and its construction method

technical field

The invention relates to a bridge construction system, in particular to a steel plate composite beam and a construction method.

Background technique

With the development of society and economy, construction technology based on standardization, assembly and informationization has become the first choice for people in the construction of civil buildings and transportation facilities. For the bridge field, the rapid construction technology of bridges based on prefabricated assembly technology is a construction method for small and medium-span bridges. Steel plate composite beam is a composite beam formed by combining prefabricated bridge deck and I-shaped steel beam. The steel plate composite beam structure helps to save the construction period, improve the mechanization and factoryization of production, and speed up the construction progress. However, there are many difficulties in the construction process of steel plate composite girders, such as the difficulty of splicing steel girders, the difficulty of positioning wet joint reinforcement, the low reuse rate of prefabricated bridge deck formwork systems, and the low positioning accuracy of prefabricated bridge decks. Strictly control and improve the construction process of steel plate composite beams.

To sum up, for the steel plate composite girder construction system, a steel plate composite girder and construction method with fast construction speed, high reuse rate of the formwork system, and high positioning accuracy of the prefabricated bridge deck are very important.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a steel plate composite beam and a construction method.

This kind of steel plate composite beam includes: assembled steel beam assembled tire frame, assembled steel tire frame, detachable bridge deck rapid formwork system, prefabricated bridge deck accurate positioning auxiliary device, wet joint steel bar setting and positioning device , Epoxy mortar precise laying device and epoxy mortar scraping knife;

The assembled steel beam assembled tire frame includes lateral limit columns; the lateral limit columns are arranged on both sides of the assembled steel beam assembled tire frame, and the lateral limit columns are provided with steel beam limit grooves;

The assembled steel tire frame includes horizontal comb plates and longitudinal comb plates, and the horizontal comb plates are provided with steel bar limit grooves; between the horizontal comb plates, there are longitudinal comb plates, and the longitudinal comb plates are also provided with steel bars limit slot;

The detachable bridge deck rapid formwork system includes a transverse comb plate, a flat base film, an end form and a wedge-shaped adjustment block. The transverse comb plate and end form are arranged around the plate base film, and a wedge-shaped adjustment block is welded above the plate base film;

Prefabricated bridge deck accurate positioning auxiliary device includes limit groove and guide channel steel, the limit groove is fixedly connected with the main girder; the prefabricated bridge deck is fixedly connected with guide channel steel;

The setting and positioning device for the wet joint reinforcement includes an upper and lower slotted connecting plate; the upper and lower slotted connecting plate is connected with a pressure plate through a temporary fixing hook; the upper and lower slotted connecting plate is provided with upper and lower reinforcing bar limit holes.

As a preference: the assembled steel beam assembled tire frame also includes tire frame vertical supports, tire frame lateral supports, tire frame diagonal supports, right-angle connectors, diagonal brace fixing plates, bracket arm bases and fixing bolts; The bottom of the vertical support of the tire frame is welded to the support arm base frame, and the support arm base frame is connected to the ground through fixing bolts; the vertical support of the tire frame and the horizontal support of the tire frame are fixed through right-angle connectors, and the right-angle connectors are equipped with fixing bolts; tire frame There is also a reinforced connection between the vertical support and the horizontal support of the tire frame, and the two ends of the diagonal support of the tire frame are respectively fixed by the diagonal brace fixing plate, the vertical support of the tire frame and the horizontal support of the tire frame; The lateral supports of the tire frame are fixed by right-angle connectors.

As a preference: the assembled steel tire frame also includes support columns, longitudinal comb-tooth plate fixing grooves, lateral supports, tire frame bottom plates, longitudinal fixing plates and card grooves; the tire frame bottom plates are symmetrically arranged left and right, The connection is strengthened by transverse support; there is a support column between the bottom plate of the tire frame and the transverse comb plate, and the support column is fixed by a right-angle connector, and a fixing bolt is arranged on the right-angle connector; a longitudinal comb plate is fixed on the transverse comb plate Slots, the fixed grooves of the longitudinal comb plates on the horizontal comb plates on the left and right sides are symmetrically arranged, and the horizontal comb plates on the left and right sides are connected by vertical fixing plates; there are also card slots on the longitudinal comb plates. Utilize the draw-in groove to be fixedly connected with the fixing groove of the longitudinal comb tooth plate.

As a preference: the detachable bridge deck rapid formwork support system also includes a diagonal brace fixing plate, a fixing bolt, a bottom mold vertical support, a bottom film lateral support and a bottom film diagonal brace; the bottom film passes through the bottom mold The vertical support is fixed to the ground, the bottom of the horizontal comb plate is connected and fixed with the flat bottom film by fixing bolts; the bottom of the end mold is connected and fixed with the flat bottom film by fixing bolts; the horizontal comb plate and the flat bottom film are laterally supported by the bottom film It is connected with the diagonal brace of the bottom film, and the two ends of the diagonal brace of the bottom film are respectively welded with a diagonal brace fixing plate, and the diagonal brace fixing plate is connected to the horizontal comb plate or the lateral support of the bottom membrane through fixing bolts.

As a preference: the prefabricated bridge deck accurate positioning auxiliary device also includes fixing bolts, vertical limiting plates, fixed connecting plates and transverse limiting plates; the vertical limiting plates are symmetrically arranged on both sides of the horizontal limiting plates There is a limit groove in the middle of the horizontal limit plate; a fixed connection plate is welded on one side of the vertical limit plate, and the fixed connection plate is connected to the main beam through fixing bolts; The channel steel falls in the limiting groove.

As a preference: the positioning device for setting the wet joint steel bar also includes a reserved hook hole; a temporary fixing hook is installed on the upper and lower slotted connecting plate through the reserved hook hole, and the upper end of the temporary fixing hook is connected with the pressure plate; the upper and lower slotting connection The top and the bottom of the plate are respectively provided with upper-layer steel bar limit holes and bottom-layer steel bar limit holes.

As a preference: the epoxy mortar precise laying device includes a displacement adjustment shaft, a slide rail, a slider, a slide rail support column, a channel steel right-angle connector, epoxy mortar and a slide rail fixing plate; the left and right sides of the slide rail support column The side is symmetrically arranged, the lower end of the slide rail support column is provided with a channel steel right-angle connector, and the channel steel right-angle connector is connected to the beam through fixing bolts; the slide rail fixing plate and the slide rail support column are fixed by bolts, and the slide rail fixing plate is provided with a slide Rails; displacement adjustment shafts are arranged at intervals on the slide rails, and the displacement adjustment shafts are connected to the slide rails through sliders.

As a preference: the epoxy mortar scraper includes an epoxy mortar storage tank, a blade, an epoxy mortar output port, an epoxy mortar delivery pipe, a valve connecting rod, a valve opening and closing plate, a valve, a handle and a support plate; There is a handle welded on one side of the support plate, and there is an epoxy mortar storage tank above the support plate, and epoxy mortar is stored in the epoxy mortar storage tank; the upper end of the epoxy mortar delivery pipe is connected with the bottom of the epoxy mortar storage tank, and the lower end is flat with the blade. Qi; The epoxy mortar conveying pipe is equipped with a valve opening and closing plate inside, and the valve opening and closing plate is connected with the valve by a valve connecting rod. When the valve rotates, the angle of the valve opening and closing plate is adjusted to change accordingly.

The construction method of this steel plate composite beam comprises the following steps:

Step 1. Use the assembled steel beam assembled tire frame to assemble the steel plate composite beam: install the assembled steel beam assembled tire frame, and the main beams are arranged at intervals in the steel beam limit grooves of the lateral limit columns; Weld beams between beams and assemble steel plate composite beams;

Step 2. Hoisting construction of steel plate composite girders: adopt the hoisting method of single longitudinal girders for the entire span one by one, and use truck cranes for hoisting.

Step 3. Binding of steel bars: install the assembled steel bar frame, use the horizontal comb plate and the longitudinal comb plate to position the steel bar spacing, and carry out the steel bar binding of the prefabricated bridge deck;

Step 4: Molding of the reinforcement skeleton and pouring of the bridge deck: After installing the detachable bridge deck formwork system, align and lower the horizontal reinforcement and the horizontal comb plate to make the reinforcement skeleton into the mold; pour the prefabricated bridge deck;

Step 5. Epoxy mortar laying: install the epoxy mortar laying device, use the slider to adjust the position of the displacement adjustment axis, and realize the precise laying of epoxy mortar; and use epoxy mortar scraper to assist paving; adjust the epoxy mortar through the valve delivery of mortar;

Step 6. Precise positioning of the bridge deck: use the prefabricated bridge deck precise positioning auxiliary device, and lift the bridge deck to make the guide channel steel drop into the limit groove;

Step 7. Wet joint construction: install the wet joint steel bars and set the positioning device. After the wet joint steel bars are positioned, the wet joint formwork is fixed with steel cables and pressure plates, and then the concrete is poured.

Preferably, in step seven: use bamboo plywood as the bottom mold of the wet joint, plastic sleeves are provided on the steel cables, fixed connecting plates are provided at both ends of the pressing plate; prefabricated bridge decks are provided with pre-embedded positioning plates, There is a pre-embedded insertion rod on the positioning plate, and the pre-embedded positioning plate is connected to the fixed connecting plate through fixing bolts; the concrete is poured after the steel bars and formwork are accepted; the concrete is poured with a truck crane and a hopper, and a plug-in vibrator is used Vibrate first four weeks and then in the middle, with quick insertion and slow removal. After the concrete construction is completed, cover it with plastic film.

The beneficial effects of the present invention are:

1) The present invention is equipped with assembled steel beams to assemble the tire frame, which is convenient for on-site assembly, and the main beams are arranged at intervals in the steel beam limit grooves of the lateral limit columns, which improves the assembly efficiency and accuracy of the steel beams.

2) The present invention is provided with assembled steel tire frames, and utilizes transverse and longitudinal combs to position the distance between the steel bars, which effectively reduces the difficulty of binding the steel bars on the prefabricated bridge deck.

3) The present invention adopts a detachable rapid formwork system for bridge decks. Horizontal comb plates and end molds are arranged around the flat bottom membrane, and wedge-shaped adjustment blocks are welded above the flat bottom membrane, which improves the prefabrication efficiency of variable-section bridge decks.

4) The present invention is equipped with a prefabricated bridge deck placement auxiliary device, and is equipped with a matching guide channel steel and a limit groove, which improves the placement accuracy of the prefabricated bridge deck.

5) The present invention is equipped with a wet joint reinforcing bar positioning device, and effectively reduces the difficulty of wet joint reinforcing bar installation through upper and lower slotted connecting plates with upper and lower reinforcing bar limit holes respectively opened at the upper and lower ends.

6) The present invention is equipped with an epoxy mortar laying device, and uses a slider to adjust the position of the displacement adjustment axis to realize precise laying of epoxy mortar, effectively improving the precision and efficiency of epoxy mortar laying.

7) The present invention adopts a self-made epoxy mortar scraper, adjusts the transmission of epoxy mortar through a valve, and is equipped with a blade flush with the lower end of the epoxy mortar delivery pipe, which can greatly increase the speed of epoxy mortar application.

Description of drawings

Fig. 1 is a structural schematic diagram of assembled steel beam assembled tire frame;

Fig. 2 is a structural schematic diagram of steel beam assembly;

Fig. 3 is a structural schematic diagram of steel girder assembly;

Fig. 4 is a structural schematic diagram of assembled type reinforced tire frame;

Fig. 5 is a structural schematic diagram of a longitudinal comb tooth plate;

Figure 6 is a schematic diagram of the detachable bridge deck quick formwork system;

Figure 7 is a schematic diagram of the installation structure of the prefabricated bridge deck;

Fig. 8 is a structural schematic diagram of a prefabricated bridge deck placement auxiliary device;

Fig. 9 is a schematic diagram of wet joint construction structure;

Fig. 10 is a structural schematic diagram of a wet joint reinforcing bar positioning device;

Fig. 11 is a schematic diagram of a steel cable structure;

Figure 12 is a schematic diagram of the anchoring of the embedded positioning plate and the fixed connector;

Fig. 13 is the structural representation of epoxy mortar laying device;

Figure 14 is a schematic diagram of the structure of a self-made epoxy mortar scraper.

In the figure: 1-assembled steel beam assembled tire frame, 2-vertical support of tire frame, 3-horizontal support of tire frame, 4-oblique support of tire frame, 5-limiting groove of steel beam, 6-right-angle connector, 7-Slant bracing fixing plate, 8-Bracket base frame, 9-Fixing bolt, 10-Lateral limit column, 11-Shear nail, 12-Vertical stiffener, 13-Main beam, 14-Beam, 15 - Assembled steel tire frame, 16-support column, 17-horizontal comb plate, 18-longitudinal comb plate fixing groove, 19-horizontal support, 20-rebar limit groove, 21-frame base plate, 22-longitudinal Fixed plate, 23-longitudinal comb plate, 24-card slot, 25-flat bottom film, 26-bottom mold vertical support, 27-bottom film lateral support, 28-bottom film diagonal brace, 29-end mold, 30 -Wedge-shaped adjustment block, 31-vertical limit plate, 32-limit slot, 33-fixed connecting plate, 34-transverse limit plate, 35-guiding channel steel, 36-prefabricated bridge deck, 37-embedded wet joint Seam reinforcement, 38-pressure plate, 39-steel cable, 40-temporary fixed steel hook, 41-bottom reinforcement, 42-upper reinforcement, 43-plastic sleeve, 44-wet joint bottom formwork, 45-up and down grooved connecting plate ,46-fixed connecting plate,47-limiting hole for upper steel bar, 48-reserved hook hole, 49-limiting hole for bottom steel bar, 50-, embedded positioning plate, 51-embedded insertion rod, 52-displacement adjustment shaft ,53-Slide rail,54-Slider block,55-Slide rail support column,56-Channel steel right-angle connector,57-Epoxy mortar,58-Slide rail fixing plate,59-Epoxy mortar storage tank,60-Blade , 61-epoxy mortar output port, 62-epoxy mortar delivery pipe, 63-valve connecting rod, 64-valve opening and closing plate, 65-valve, 66-handle, 67-support plate.

Detailed ways

The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, some modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Embodiment one

As an example, as shown in Figure 1 to Figure 14, this steel plate composite beam system includes assembled steel beam assembled tire frame 1, tire frame vertical support 2, tire frame lateral support 3, tire frame diagonal support 4. Steel beam limit groove 5, right-angle connector 6, diagonal brace fixing plate 7, support arm chassis 8, fixing bolt 9, lateral limit column 10, shear nail 11, vertical stiffener 12, main beam 13. Beam 14, assembled steel tire frame 15, supporting column 16, horizontal comb plate 17, longitudinal comb plate fixing groove 18, lateral support 19, steel bar limit groove 20, tire frame bottom plate 21, longitudinal fixing plate 22 , Longitudinal comb plate 23, card slot 24, flat bottom film 25, bottom mold vertical support 26, bottom film lateral support 27, bottom film diagonal brace 28, end mold 29, wedge-shaped adjustment block 30, vertical limit plate 31. Limiting groove 32, fixed connecting plate 33, transverse limiting plate 34, guide channel steel 35, prefabricated bridge deck 36, pre-embedded wet joint reinforcement 37, pressure plate 38, steel cable 39, temporary fixing steel hook 40, bottom layer Steel bars 41, upper steel bars 42, plastic sleeves 43, wet joint bottom formwork 44, upper and lower slotted connecting plates 45, fixed connecting plates 46, upper steel bar limit holes 47, reserved hook holes 48, bottom steel bar limit holes 49 , pre-embedded positioning plate 50, pre-embedded insertion rod 51, displacement adjustment shaft 52, slide rail 53, slide block 54, slide rail support column 55, channel steel right-angle connector 56, epoxy mortar 57, slide rail fixing plate 58, Epoxy mortar storage tank 59, blade 60, epoxy mortar output port 61, epoxy mortar delivery pipe 62, valve connecting rod 63, valve opening and closing plate 64, valve 65, handle 66, support plate 67; Assembled steel beam assembly tire frame 1; prefabricated bridge deck 36 steel bars are bound using modular steel tire frame 15; detachable bridge deck rapid formwork system is adopted; prefabricated bridge deck 36 is equipped with accurate positioning auxiliary devices; wet joints Set the positioning device for the steel bar; set the epoxy mortar 57 precise laying device; use the self-made epoxy mortar scraper to quickly apply.

The assembled steel beam assembled tire frame 1 is composed of tire frame vertical support 2, tire frame horizontal support 3, tire frame oblique support 4, steel beam limit groove 5, right-angle connector 6, and diagonal brace fixing plate 7 , support arm base frame 8, fixing bolt 9 and lateral limit post 10; tire frame vertical support 2 bottom welding support arm base frame 8, fixed bolt 9 is set to connect with the ground; tire frame vertical support 2 and tire frame The lateral support 3 is fixed by a right-angle connector 6, and the right-angle connector 6 is provided with a fixing bolt 9; the tire frame vertical support 2 and the tire frame lateral support 3 are also provided with a tire frame diagonal support 4 to strengthen the connection, and the tire frame diagonal support 4 two The ends are respectively welded with the diagonal brace fixing plate 7 and the vertical support 2 of the tire frame and the horizontal support 3 of the tire frame; the lateral limit column 10 is provided with a steel beam limit groove 5, which is fixed with the horizontal support 3 of the tire frame through a right-angle connector 6 .

The assembled steel tire frame 15 is composed of a support column 16, a transverse comb plate 17, a longitudinal comb plate fixing groove 18, a lateral support 19, a steel bar limit groove 20, a tire frame bottom plate 21, a longitudinal fixing plate 22, Composed of longitudinal comb plate 23 and card slot 24; tire frame bottom plate 21 is symmetrically arranged left and right, and the connection is strengthened by lateral support 19; steel bar limit groove 20 is set on transverse comb tooth plate 17; between tire frame bottom plate 21 and horizontal comb tooth plate 17 The support column 16 is set and fixed by the right-angle connector 6, and the fixing bolt 9 is arranged on the right-angle connector 6; the longitudinal comb-tooth plate fixing groove 18 is arranged on the horizontal comb-tooth plate 17, and the left and right sides are symmetrically arranged, and the longitudinal fixing plate 22 is used to strengthen Connection; the longitudinal comb-tooth plate 23 is provided with a steel bar limiting groove 20 and a draw-in groove 24, and the draw-in groove 24 is fixedly connected to the fixing groove 18 of the longitudinal comb-tooth plate.

The detachable bridge deck rapid formwork support system consists of a diagonal brace fixing plate 7, a fixing bolt 9, a transverse comb plate 17, a flat bottom film 25, a bottom mold vertical support 26, a bottom film lateral support 27, a bottom Membrane braces 28, end molds 29 and wedge-shaped adjustment blocks 30; the bottom mold vertical support 26 is set under the flat bottom membrane 25 to fix it with the ground, and the wedge-shaped adjustment block 30 is welded on the top; The bottom film 25 is connected and fixed; the bottom fixing bolt 9 of the end mold 29 is connected and fixed with the flat bottom film 25; The two ends of the diagonal brace 28 are respectively welded with the diagonal brace fixing plate 7, and are connected with the transverse comb tooth plate 17 and the bottom membrane lateral support 27 through the fixing bolts 9.

The prefabricated bridge deck accurate placement auxiliary device is composed of a fixing bolt 9, a vertical limit plate 31, a limit groove 32, a fixed connecting plate 33, a transverse limit plate 34 and a guide channel steel 35; the vertical limit The plate 31 and the transverse limiting plate 34 are processed by welding, arranged symmetrically on the left and right, with a limiting groove 32 in the middle; one side of the vertical limiting plate 31 is welded and fixed to the connecting plate 33, which is connected to the main beam 13 through the fixing bolt 9; prefabricated The bridge deck 36 is fixedly connected to the guide channel steel 35 through the fixing bolts 9, and the precise positioning of the prefabricated bridge deck 36 is realized by the guide channel steel 35 falling into the limit groove 32.

The positioning device for the wet joint reinforcing bar is composed of a temporary fixing hook 40, an upper and lower slotted connecting plate 45, an upper reinforcing bar limit hole 47, a reserved hook hole 48 and a bottom reinforcing bar limiting hole 49; the upper and lower slotted connecting plate 45 is provided with a reserved hook hole 48 to install a temporary fixed hook 40, which is connected with the pressing plate 38 by the temporary fixed hook 40; the top and bottom of the upper and lower grooved connecting plate 45 are respectively provided with an upper floor steel bar limit hole 47 and a bottom steel bar limit hole 49 to realize Precise positioning of wet joint reinforcement.

The epoxy mortar 57 precise laying device is composed of a displacement adjustment shaft 52, a slide rail 53, a slider 54, a slide rail support column 55, a channel steel right-angle connector 56, an epoxy mortar 57 and a slide rail fixing plate 58; The left and right sides of the slide rail support column 55 are symmetrically arranged, and the lower end is provided with a channel steel right-angle connector 56 connected to the beam 14 through the fixing bolt 9; the slide rail fixing plate 58 and the slide rail support column 55 are fixed by bolts, and the slide rail 53 is arranged on it; Displacement adjustment shafts 52 are arranged at intervals on the slide rail, and are connected to the slide rail 53 through a slider 54 , and the position of the displacement adjustment shaft 52 is adjusted by the slider 54 to realize accurate laying of the epoxy mortar 57 .

The epoxy mortar scraping knife is composed of epoxy mortar storage tank 59, blade 60, epoxy mortar output port 61, epoxy mortar delivery pipe 62, valve connecting rod 63, valve opening and closing plate 64, valve 65, handle 66 and support plate 67 are formed; support plate 67 right side welds handle 66, and epoxy mortar storage tank 59 is arranged above to store epoxy mortar 57; 60 is flush; the epoxy mortar delivery pipe 62 is provided with a valve opening and closing plate 64, and the valve connecting rod 63 is used to connect with the valve 65, and the angle of the valve opening and closing plate 64 is adjusted by rotating the valve 65 to realize the delivery of the epoxy mortar 57.

Embodiment two

As another embodiment, the construction method of the steel plate composite beam described in Embodiment 1 is given in this embodiment, and its main construction steps are as follows:

Step 1. Steel girder transportation: After the steel structure units are manufactured in the factory, they are transported by road to the bridge erection site, and the steel girders are assembled, lengthened, installed and erected on the assembled steel girder assembly frame 1.

Assembled steel beam assembled tire frame installation: Assembled steel beam assembled tire frame 1 is supported vertically by the tire frame 2, horizontally supported by the tire frame 3, obliquely supported by the tire frame 4, steel beam limit groove 5, right-angle connector 6 , diagonal bracing fixing plate 7, support arm base frame 8, fixing bolt 9 and lateral limit column 10; The vertical support 2 and the horizontal support 3 of the tire frame are fixed by the right-angle connector 6, and the right-angle connector 6 is provided with a fixing bolt 9; the vertical support 2 of the tire frame and the lateral support 3 of the tire frame are also provided with a diagonal support 4 of the tire frame to strengthen the connection, The two ends of the tire frame diagonal support 4 are respectively welded with the diagonal brace fixing plate 7 and the vertical support 2 of the tire frame and the horizontal support 3 of the tire frame; Fastened via right-angle connector 6. The prefabricated main beam 13 is provided with vertical stiffeners 12 and shear studs 11, and the main beam 13 is arranged at intervals in the steel beam limit groove 5 of the lateral limit column 10; the beams are welded between adjacent main beams 13 14.

Step 2. Steel plate composite beam hoisting construction: After the steel plate composite beam is assembled on site, use the method of hoisting the entire span of a single longitudinal beam one by one, and use a truck crane for hoisting. The hoisting sequence of the steel plate composite beam longitudinal beam is: inner side beam → middle beam → Middle beam → outer beam.

Step 3: Installation of assembled steel bar frame: assembled steel bar frame 15 consists of support column 16, horizontal comb plate 17, longitudinal comb plate fixing groove 18, lateral support 19, steel bar limit groove 20, and tire frame bottom plate 21. The longitudinal fixing plate 22, the longitudinal comb plate 23 and the card slot 24 are composed; the bottom plate of the tire frame 21 is symmetrically arranged on the left and right, and the connection is strengthened by the transverse support 19; A support column 16 is set between the horizontal comb plate 17 and fixed by a right-angle connector 6, and a fixing bolt 9 is arranged on the right-angle connector 6; a longitudinal comb plate fixing groove 18 is arranged on the horizontal comb plate 17, and the left and right sides are arranged symmetrically , the connection is strengthened through the longitudinal fixing plate 22; the longitudinal comb tooth plate 23 is provided with a steel bar limiting groove 20 and a locking groove 24, and the locking groove 24 is fixedly connected with the fixing groove 18 of the longitudinal comb tooth plate.

Reinforcement binding: After the assembly-type reinforcement frame 15 is installed, use the comb plate to locate the spacing of the reinforcement, and carry out the reinforcement binding of the prefabricated bridge deck 36. The binding of the reinforcement should meet the construction requirements of the bridge.

Step 4. Fabrication and installation of the detachable bridge deck formwork system: the detachable bridge deck quick formwork system is a combination system of flat bottom formwork 25 + wedge-shaped adjustment block 30 + comb plate and end formwork 29, only adjusted according to the drawing The positions of the wedge-shaped adjustment block 30 and the end form 29 are used to change the size of the prefabricated bridge deck 36 . The bottom mold vertical support 26 is fixed to the ground under the flat bottom film 25 of the detachable bridge deck rapid formwork system, and the wedge-shaped adjustment block 30 is welded on the top; the bottom fixing bolt 9 of the horizontal comb plate 17 is connected and fixed to the flat bottom film 25; The bottom fixing bolts 9 of the end mold 29 are connected and fixed with the flat bottom film 25; the bottom film lateral supports 27 and the bottom film diagonal braces 28 are arranged between the transverse comb plate 17 and the flat bottom film 25 to strengthen the connection, and the two ends of the bottom film diagonal braces 28 are respectively The diagonal brace fixing plate 7 is welded, and is connected with the transverse comb tooth plate 17 and the bottom membrane lateral support 27 through fixing bolts 9 .

Reinforcement skeleton into the mold: After the reinforcement is bound, use a special reinforcement hoisting sling to slowly lift it to the top of the formwork, adjust the position to align the horizontal reinforcement and the gap between the comb plate, and then slowly lower the reinforcement to make the reinforcement skeleton slowly enter the mold , If there is a conflict between the steel bar and the formwork during the mold entry process, the spacing of some steel bars should be adjusted in time to make it enter the mold smoothly, and then restore it; after the mold entry is completed, install the transverse prestressed pipe.

Concrete pouring and maintenance of the bridge deck: In order to ensure the inner and appearance quality of the prefabricated bridge deck 36 concrete, vibrate with a Φ30 vibrator below the bellows, and vibrate with a Φ50 vibrator above the bellows. The vibrator shall not collide with formwork, bellows and other embedded parts. Concrete maintenance adopts the method of surface coating and sprinkling water for moisturizing.

Tensioning and grouting: the steel strands are stretched in a single-end staggered manner, and the steel strands are staggered in turn, single-end tensioned, and loaded step by step; before the grouting, the air compressor is used to clean the tunnels, and the intelligent grouting equipment is used for cleaning. Grouting, the grouting of the same pipeline should be carried out continuously and completed at one time.

Step 5, epoxy mortar laying: epoxy mortar laying device is installed when epoxy mortar 57 is laid, by displacement adjustment shaft 52, slide rail 53, slide block 54, slide rail support column 55, channel steel right angle connector 56, ring Composed of oxygen mortar 57 and slide rail fixing plate 58; the left and right sides of the slide rail support column 55 are symmetrically arranged, and the lower end is provided with a channel steel right-angle connector 56 connected to the beam 14 through the fixing bolt 9; the slide rail fixing plate 58 and the slide rail support column 55 It is fixed by bolts, and slide rails 53 are arranged on it; displacement adjustment shafts 52 are arranged at intervals on the slide rails, connected with slide rails 53 through sliders 54, and the position of the displacement adjustment shafts 52 is adjusted by sliders 54 to realize accurate epoxy mortar 57. Laying; when epoxy mortar 57 is laid, adopt self-made epoxy mortar scraper to pave evenly; By turning the valve 65 that is provided with on the epoxy mortar scraper, adjust the angle of valve opening and closing plate 64, realize epoxy mortar 57 delivery.

Step 6. Prefabricated bridge deck installation: the bridge deck 36 is installed using the prefabricated bridge deck accurate positioning auxiliary device, which consists of fixing bolts 9, vertical limit plates 31, limit slots 32, fixed connecting plates 33, transverse limit plates 34 and The guide channel steel 35 is composed of; the vertical limiting plate 31 and the transverse limiting plate 34 are processed by welding, arranged symmetrically on the left and right, and the limiting groove 32 is arranged in the middle; one side of the vertical limiting plate 31 is welded to fix the connecting plate 33, The fixing bolts 9 are connected with the main girder 13; the prefabricated bridge deck 36 is fixedly connected with the guide channel steel 35 through the fixing bolts 9, and the guide channel steel 35 is placed in the limit groove 32, and the bridge deck 36 is hoisted by a crane to realize the precision of the prefabricated bridge deck 36. position.

Step 7. Wet joint construction: After the bridge deck 36 is in place, start the wet joint construction. When the wet joint steel bars are tied, a positioning device is installed, which consists of a temporary fixing hook 40, upper and lower slotted connecting plates 45, and upper steel bar limit Holes 47, reserved hook holes 48 and bottom steel bar limit holes 49 are formed; upper and lower slotted connecting plates 45 are provided with reserved hook holes 48 for installing temporary fixed hooks 40, and are connected with pressure plate 38 through temporary fixed hooks 40; upper and lower slotted connections The top and the bottom of the plate 45 are respectively provided with an upper-layer steel bar limit hole 47 and a lower-layer steel bar limit hole 49 to realize precise positioning of wet joint steel bars. The wet joint template adopts bamboo plywood as the bottom form, and is fixed by steel cables 39 and pressure plates 38. Plastic sleeves 43 are arranged on the steel cables 39, and fixed connecting plates 46 are arranged at both ends of the pressure plates 38; The embedded positioning plate 50 is provided with a pre-embedded insertion rod 51 on the embedded positioning plate 50, and is connected with the fixed connecting plate 46 through the fixing bolt 9. Concrete can be poured after the steel bars and formwork are accepted. The concrete is poured with a truck crane and a hopper, and the plug-in vibrator is first four weeks and then the middle, so as to achieve quick insertion and slow extraction to avoid over-vibration and leakage. After the concrete construction is completed, it is covered with a plastic film to lock in moisture and prevent early shrinkage and cracks.

Claims (10)

1. A steel plate composite beam is characterized in that it comprises: assembled type steel beam assembled tire frame (1), assembled type reinforced steel tire frame (15), detachable bridge deck rapid formwork system, prefabricated bridge deck precisely Auxiliary device for positioning, wet joint reinforcement setting and positioning device, epoxy mortar precise laying device and epoxy mortar scraping knife; The assembled steel beam assembled tire frame (1) includes lateral limiting columns (10); the lateral limiting columns (10) are arranged on both sides of the assembled steel beam assembled tire frame (1), and the lateral limiting columns (10) is provided with steel beam limit groove (5); Assembled steel tire frame (15) includes transverse comb plate (17) and longitudinal comb plate (23), and transverse comb plate (17) is provided with reinforcing bar limit groove (20); Horizontal comb plate (17) A longitudinal comb-tooth plate (23) is arranged between them, and a reinforcing bar limiting groove (20) is also provided on the longitudinal comb-tooth plate (23); The detachable bridge deck rapid formwork system includes a transverse comb plate (17), a flat bottom film (25), an end form (29) and a wedge-shaped adjustment block (30), a transverse comb plate (17) and an end form (29 ) is located around the flat bottom film (25), and a wedge-shaped adjustment block (30) is welded above the flat bottom film (25); The prefabricated bridge deck accurate positioning auxiliary device includes a limit groove (32) and a guide channel steel (35), the limit groove (32) is fixedly connected with the main girder (13); the prefabricated bridge deck (36) is fixedly connected with the guide channel steel (35); The setting and positioning device for the wet joint reinforcing bar includes the upper and lower slotted connecting plates (45); the upper and lower slotted connecting plates (45) are connected with the pressure plate (38) through the temporary fixing hooks (40); the upper and lower slotted connecting plates (45) are provided with upper Reinforcing bar limiting hole (47) and bottom reinforcing bar limiting hole (49). 2. The steel plate composite beam according to claim 1, characterized in that: the assembled steel beam assembly tire frame (1) also includes tire frame vertical support (2), tire frame lateral support (3) , tire frame diagonal support (4), right-angle connectors (6), diagonal brace fixing plate (7), bracket arm chassis (8) and fixing bolts (9); tire frame vertical support (2) bottom weld bracket arm The underframe (8) and the support arm underframe (8) are connected to the ground through fixing bolts (9); the tire frame vertical support (2) and the tire frame lateral support (3) are fixed through right-angle connectors (6) and connected at right angles Fixing bolts (9) are provided on the piece (6); tire frame diagonal supports (4) are also provided between the tire frame vertical support (2) and the tire frame lateral support (3) to strengthen the connection, and the tire frame diagonal support (4) The two ends are respectively fixed by the diagonal brace fixing plate (7) and the tire frame vertical support (2) and the tire frame lateral support (3); the lateral limit column (10) and the tire frame lateral support (3) are connected through right-angle connectors (6) Fixed. 3. The steel plate composite beam according to claim 1, characterized in that: the assembled steel tire frame (15) also includes supporting columns (16), longitudinal comb-tooth plate fixing grooves (18), lateral support (19), tire frame bottom plate (21), longitudinal fixing plate (22) and card slot (24); the tire frame bottom plate (21) is symmetrically arranged left and right, and the connection between the tire frame bottom plates (21) is strengthened by transverse support (19) ; A support column (16) is provided between the tire frame bottom plate (21) and the transverse comb plate (17), and the support column (16) is fixed by a right-angle connector (6), which is provided with a fixing bolt ( 9); the horizontal comb plate (17) is provided with longitudinal comb plate fixing grooves (18), and the longitudinal comb tooth plate fixing grooves (18) on the left and right lateral comb tooth plates (17) are symmetrically arranged, and the left and right sides The horizontal comb-tooth plates (17) are connected by longitudinal fixing plates (22); the longitudinal comb-tooth plates (23) are also provided with draw-in slots (24), and the longitudinal comb-tooth plates (23) utilize the draw-in slots (24) and the longitudinal Comb tooth plate fixing groove (18) is fixedly connected. 4. The steel plate composite girder according to claim 1, characterized in that: said detachable bridge deck rapid formwork support system also includes diagonal brace fixing plates (7), fixing bolts (9), bottom formwork vertical Support (26), bottom film lateral support (27) and bottom film diagonal brace (28); the bottom of the flat bottom film (25) is fixed to the ground through the bottom mold vertical support (26), and the bottom of the horizontal comb plate (17) The fixed bolt (9) is connected and fixed with the flat bottom film (25); the bottom of the end mold (29) is connected and fixed with the flat bottom film (25) by the fixing bolt (9); the horizontal comb tooth plate (17) is connected with the flat bottom film ( 25) through the bottom film lateral support (27) and the bottom film diagonal brace (28) to strengthen the connection, and the two ends of the bottom film diagonal brace (28) are respectively welded with a diagonal brace fixing plate (7), and the diagonal brace fixing plate (7) Connect the horizontal comb plate (17) or the bottom membrane lateral support (27) by fixing bolts (9). 5. The steel plate composite girder according to claim 1, characterized in that: said prefabricated bridge deck accurate placement auxiliary device also includes fixing bolts (9), vertical limiting plates (31), fixed connecting plates ( 33) and the horizontal limiting plate (34); the vertical limiting plate (31) is symmetrically arranged at both ends of the horizontal limiting plate (34), and a limiting groove (32) is arranged in the middle of the horizontal limiting plate (34); One side of the vertical limiting plate (31) is welded with a fixed connecting plate (33), and the fixed connecting plate (33) is connected with the main girder (13) by fixing bolts (9); 9) The guide channel steel (35) is fixedly connected, and the guide channel steel (35) falls in the limit groove (32). 6. The steel plate composite beam according to claim 1, characterized in that: the positioning device for the wet joint reinforcing bar also includes a reserved hook hole (48); The hook hole (48) is equipped with a temporary fixed hook (40), and the upper end of the temporary fixed hook (40) is connected with the pressing plate (38); the top and bottom of the upper and lower grooved connecting plates (45) are respectively provided with upper layer steel bar limit holes (47) and bottom reinforcement limit hole (49). 7. The steel plate composite beam according to claim 1, characterized in that: the precise laying device for epoxy mortar comprises a displacement adjustment shaft (52), a slide rail (53), a slide block (54), a slide rail support Column (55), channel steel right-angle connector (56), epoxy mortar (57) and slide rail fixing plate (58); the left and right sides of the slide rail support column (55) are symmetrically arranged, and the lower end of the slide rail support column (55) A channel steel right-angle connector (56) is provided, and the channel steel right-angle connector (56) is connected to the beam (14) through a fixing bolt (9); the slide rail fixing plate (58) and the slide rail support column (55) are fixed by bolts , the slide rail fixing plate (58) is provided with a slide rail (53); the slide rail (53) is arranged with displacement adjustment shafts (52) at intervals, and the displacement adjustment shaft (52) passes through the slide block (54) and the slide rail (53 )connect. 8. The steel plate composite beam according to claim 1, characterized in that: the epoxy mortar scraping knife includes an epoxy mortar storage tank (59), a blade (60), and an epoxy mortar output port (61) , epoxy mortar delivery pipe (62), valve connecting rod (63), valve opening and closing plate (64), valve (65), handle (66) and support plate (67); one side of support plate (67) is welded with Handle (66), support plate (67) top is provided with epoxy mortar storage tank (59), and epoxy mortar storage tank (59) is stored with epoxy mortar (57); Epoxy mortar delivery pipe (62) upper end and The bottom of the epoxy mortar storage tank (59) is connected, and the lower end is flush with the blade (60); the epoxy mortar delivery pipe (62) is provided with a valve opening and closing plate (64), and the valve opening and closing plate (64) utilizes a valve connecting rod (63) is connected with valve (65), and the angle of adjusting valve opening and closing plate (64) changes thereupon when valve (65) rotates. 9. The construction method of the steel plate composite beam according to any one of claims 1 to 8, characterized in that it comprises the following steps: Step 1. Use the assembled steel beam assembled tire frame to assemble the steel plate composite beam: install the assembled steel beam assembled tire frame (1), and the main beam (13) is arranged at intervals on the steel beams of the lateral limit columns (10) In the limit groove (5); weld the beam (14) between the adjacent main beams (13), and assemble the steel plate composite beam; Step 2. Hoisting construction of steel plate composite girders: adopt the hoisting method of single longitudinal girders for the entire span one by one, and use truck cranes for hoisting. Step 3, steel bar binding: install the modular steel bar frame (15), use the horizontal comb plate (17) and the longitudinal comb plate (23) to position the steel bar spacing, and carry out the steel bar binding of the prefabricated bridge deck (36); Step 4: Molding of reinforcement skeleton and pouring of bridge deck: After installing the detachable bridge deck formwork system, align and lower the horizontal reinforcement and horizontal comb plate (17) to make the reinforcement skeleton into the mold; pour the prefabricated bridge deck (36 ); Step 5, epoxy mortar laying: install the epoxy mortar laying device, use the slider (54) to adjust the position of the displacement adjustment shaft (52), and realize the precise laying of the epoxy mortar (57); and use the epoxy mortar scraper Auxiliary paving; adjust the delivery of epoxy mortar (57) through valve (65); Step 6. Accurate positioning of the bridge deck: Utilize the prefabricated bridge deck accurate positioning auxiliary device, and lift the bridge deck (36) to make the guide channel steel (35) drop into the limit groove (32); Step 7. Construction of wet joints: install the reinforcing bars for wet joints and set a positioning device. After the reinforcing bars for wet joints are positioned, the formwork for wet joints is fixed with steel cables (39) and pressure plates (38), and then concrete is poured. 10. The construction method of steel plate composite beam according to claim 9, is characterized in that, in step seven: adopt bamboo plywood as the base mold of wet joint, and steel cable (39) is provided with plastic sleeve (43) , the two ends of the pressure plate (38) are provided with fixed connecting plates (46); the prefabricated bridge deck (36) is provided with a pre-embedded positioning plate (50), and the pre-embedded positioning plate (50) is provided with a pre-embedded insertion rod (51) , the pre-embedded positioning plate (50) is connected with the fixed connecting plate (46) through the fixing bolts (9); the concrete is poured after the steel bars and formwork are accepted; Vibrate first four weeks and then in the middle, with quick insertion and slow removal. After the concrete construction is completed, cover it with plastic film.

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