JPH0256450B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a construction method using a large-scale formwork, and more specifically, it facilitates the removal, movement, and assembly of a large-scale formwork, and also facilitates the pouring of one-story concrete structure. It relates to a construction method in which the building frame structure is built on the upper floors one after another.

Traditionally, to make frame structures such as medium-rise buildings,
Generally, the metal form construction method has been used, but since assembly and disassembly are done by hand, this metal form construction method takes a long time. For this reason, various construction methods using large formwork have become popular in recent years, but in all of these construction methods, the concrete for walls, columns, beams, and slabs is poured in two steps. As a result, the construction work became complicated because the large formwork for walls and columns had to be set, removed, and moved, and the large formwork for beams and slabs had to be set, removed, and moved alternately. The reality is that construction efficiency has not improved as much as expected.

On the other hand, overseas, there is an architectural tunnel construction method that requires only one step of pouring concrete for the slab and walls, but this method can only be applied to structures with simple shapes. Furthermore, since the curing period for slab concrete is long and the curing period for wall and column concrete is short, it is necessary to demold the formwork in two steps, but this is not possible with the tunnel construction method.

Normally, when concrete is poured for a frame structure in one go, if the formwork is made into a large assembly formwork, it is difficult to move it to the upper floors because of the concrete slabs and beams.

The present invention was developed in view of the above circumstances, and consists of a combination of a large column formwork and a large slab/beam formwork, and the concrete is poured inside the set.
After curing, each formwork in the large assembly is removed, moved to the opening of the frame structure, lifted from there to a predetermined position on the upper floor, assembled, and then concrete for the frame is poured. The aim is to provide a construction method using large-scale formwork that can be repeated in sequence.

The details of the construction method using the large assembled formwork according to the present invention will be explained below.

First, the large-scale formwork and related auxiliary formwork for carrying out the construction method of the present invention will be explained using figures.

What is shown in Fig. 1 a and b is a large column formwork 1 for constructing pillars called wall pillars.
A wide formwork panel 4 is constructed by connecting multiple steel formworks 2 with U-clips, and then reinforcing them by connecting thick pieces 3 of two square pipes at the top, middle, and bottom three stages. A narrow formwork panel 5 is rotatably supported at opposite side ends of each formwork panel 4 so as to face each other. That is, angle members 5 are placed on both sides of the formwork panel 5 to abut against the side ends of the wide formwork panel 4.
a, and hinge plates 6 are fixed to the angle member 5a at one side end in three stages: upper, middle, and lower. A hinge bolt 8 is inserted into a long hole 7 drilled at the end and tightened, and the narrow formwork panel is rotatably supported at the side end of the wide formwork panel 4. Note that the elongated holes 7 may be provided in the hinge plate 6 instead of being provided at the ends of the end pieces 3, and the bolt holes of the hinge plates 6 may be provided at the ends of the end pieces 3. Therefore, the formwork panels 5 on the two sides of the column can be opened and closed. After the formwork panel 5 is rotated and closed, tie bolts 9 are tightened and tensioned between the ends of the thick timbers 3 that face each other on the outside, and the space between the wide formwork panels 4 that face each other is made of concrete. The concrete is placed in place to prevent it from spreading.
Hanger mounting fittings 10 are provided on the left and right sides of the outer surface of the thick timber 3 at the top of each wide formwork panel 4, and below these hanger fittings 10 are attached to the formwork panel 4 for lifting with a lifting frame to be described later. is removably mounted horizontally.

The upper end of the formwork panel 5 is lower than that of the formwork panel 4, and when it is set in a predetermined position, the L-shaped steel formwork at the end of the beam bottom formwork, which will be described later, is placed in this part. It is becoming more and more like that.

Figure 2 shows the large slab/beam formwork 13.
A beam side formwork 17 is supported under adjustment formworks 16 at both left and right ends of a slab formwork 15 supported on the slab formwork 15 so as to be movable forward and backward. That is, below the main drawer 14a on the upper surface of the table 14, there are a plurality of telescopic tubes 18 which are extendable and retractable on both the left and right sides at regular intervals, and are connected to the slab formwork 1.
5, and the expandable tube holder attached to the outer surface of the beam side formwork 17 is connected with pins to the connectors 22 at both ends of this expandable tube 18, so that the beam side formwork 17 connects to both left and right ends of the slab formwork 15. It is supported along the lower side of the adjustment formwork 16 so as to be movable forward and backward. A hydraulic jack is used as a driving source for sliding this beam side formwork 17, and this hydraulic jack is mounted on a handcart, and when in use, it connects a bracket provided on one side of the central part of the telescoping pipe 18 and the beam formwork 17. It is suspended from the engaging pin of the jack holder attached to the outer surface of the holder. When the beam-side formwork 17 at both left and right ends of the slab formwork 15 is advanced, a spacing-maintaining formwork of appropriate dimensions is arranged below the adjustment formwork 16, and this spacing-maintaining formwork 34 is placed on the beam side. It is connected to the formwork 17 with a U clip (not shown), and is connected to the adjustment formwork 16 and the slab formwork 15 with a clamp pin with a U clip (not shown). A hanger rail 37 is horizontally attached to the outer lower end of the beam side formwork 17 via a hanger rail hanging fitting (not shown), and an extendable hanger 38 can run on the hanger rail 37 using rollers 39 at its upper end. installed on.

What is shown in FIG. 3 is a beam bottom formwork 40, which is connected to a flat steel formwork 41a and the upper ends of the formwork panels 5 on both sides of the large column column formwork 1. The L-shaped steel formwork 41b is assembled and set individually.

What is shown in Figure 4 is the large slab/beam formwork 1.
The beam formwork 42 at the front and back ends of No. 3
is arranged at the lower end between the L-shaped beam side steel formwork 42a connected to the front end or rear end of the slab formwork 15, the beam side formwork 42b for this, and both beam side steel formworks 42a, 42b. It consists of a flat beam-bottomed steel formwork 42c, which are assembled and set individually. Note that 42a' is a tapered beam side steel formwork for demolding.

What is shown in FIG.
A hanger rail 37 and a hanger 38 are provided for movably suspending the form panel 4 on the outer surface of the block, and are connected to the beam side formwork 17 of the large slab/beam formwork 13 with tie bolts and set. It is designed to be connected and supported by a formwork panel 4 on the outer surface of the large column formwork 1.

Next, use the above-mentioned large column formwork 1, large slab/beam formwork 13, beam bottom formwork 40, beam formwork 42, external beam side formwork panel 43, etc. to construct the frame structure of a medium-rise building. Explain the process of construction method.

With each formwork set in advance,
After the concrete for the first floor frame has been poured and the curing period has passed, first, as shown in Figure 6a, hanger rails are installed at the lower ends of the beam side formwork 17 at both ends of each large slab/beam formwork 13. Remove the pillow 45, which is movably suspended from the pillar 37 via the hanger 38 and which receives the lower end of the large column formwork 1 connected to the lower end of the beam side formwork 17, as shown in FIG. 6b. The large column formwork 1 and the beam side formwork 17 are uncoupled, and then the tie bolts 9 stretched between the ends of the thick timbers 3 facing each other on the outside of the narrow formwork panel 5 are removed. , each formwork panel 5 is pulled outward along the long hole 7 of the end piece 3 via the hinge bolt 8, and rotated around the hinge bolt 8 to open at right angles. Next, the corner angles 46 connecting the L-shaped steel formwork 41b at the end of the beam bottom formwork 40 and both upper sides of the wide formwork panel 4 are removed. Next, the large-assembly column form 1 is demolded, and the large-assembly column form 1 is moved within the hanger rail 37 via the rollers 39 of the hanger 38 to the opening side of the frame structure. Similarly, each large-assembly column formwork 1 is sequentially moved to the frame opening side through the above-described procedure. At this time, the wide formwork panel 4 located on the outer surface of the outer column travels within the hanger rail 37 (see FIG. 5) attached to the lower end of the outer beam side formwork panel 43.

Next, as shown in FIG. 6c, hook the hanging cable W of the lifting frame F to the hanging fitting 11 of the large column formwork 1 that has been moved to the opening of the frame structure B, and remove the hanger 38 from the hanger fitting 10. Then, using the lifting frame F, move the large column formwork 1 until one side of it protrudes outside the frame structure B as shown by the dashed line, and open the formwork panel 5 on one side.
After closing and connecting the opposing formwork panels 4,
The entire large column formwork 1 is pulled out to the outside of the frame structure B by the lifting frame F and lifted up as shown by the solid line. Then, the column reinforcing bars 47 on the second floor are arranged, and the kicker 48 is suspended at a predetermined position built integrally with the frame structure B so as to enclose the column reinforcing bars 47 as shown in FIG. 6d. Place it on a pillow 45 placed on the outside, close the formwork panel 5 that is open on the other side, and tighten and tension the tie bolts 9 between the ends of the end pieces 3 facing each other on both outside sides to complete the set. Finish. Each similar large column formwork 1 is lifted up and moved to a predetermined position on the upper floor and set.

Next, the supports 49 shown in FIG. 6b of the beam bottom formwork 40 between each large-assembly column formwork 1 in the running direction of the large-assembly column formwork 1 are removed, and the corner angles on both sides of the flat steel formwork 41a are removed. 50, the steel formwork 41a and the L-shaped steel formwork 41b are uncoupled from the beam side formwork 17 of the large slab/beam formwork 13, and then demolded and moved to the second floor. As shown in FIG. 6e, the support 49 is used to set between the large column formwork 1 set previously.

Also, large slab/beam formwork 1 shown in Figure 6 f
Beam-side steel formwork 42 of the beam formwork 42 at the front-back direction end of No. 3
a', 42a, and 42b are demolded, and the lower end beam bottom steel formwork 42c (see Figure 4) is demolded by removing the support, and these are moved to the second floor and processed in the same manner as in Figure 6f. Assemble the beam formwork 42.

Next, remove the tapered beam side formwork 51 (see Fig. 6 f) for demolding at the end of the beam side formwork 17 at both left and right ends of the large assembled slab/beam formwork 13, and remove the After removing the spacing formwork 34 on the lower side of the frame 16,
A hydraulic jack mounted on the handcart 30 is stretched between a bracket on one side of the telescoping pipe 18 and a jack receiving fitting (not shown) on the beam side formwork 17, and the hydraulic jack is shortened. As shown in FIG. g, the beam-side formwork 17 connected and supported at the tip of the telescopic tube 18 is moved back and removed from the mold. After demolding, remove the hydraulic jack,
After removing the wheelbarrow 30, a dolly 52 is placed below the table 14, and after pulling up the lower support 14b of the table 14 as shown in FIG.
The entire large slab/beam formwork 13 is lowered to remove the slab formwork 15 and pass under the beam, and the dolly 52 is run to lower the large slab/beam formwork 13 as shown in Figure 6i. 13 to the opening of the frame structure B.

Next, the large slab/beam formwork 13 moved to the opening of the frame structure B is lifted together with the table 14 by the lifting frame F' and moved to a predetermined position on the second floor as shown in Fig. 6j. The dolly 52 moves to demold the next large slab/beam formwork 13, demolds the large slab/beam formwork 13 in the same manner as above, and moves to the opening of the frame structure B. This large slab/beam formwork 13 is lifted up by a lifting frame F' and moved to a predetermined position on the second floor. When all the large slab/beam forms 13 have not been moved to the predetermined positions on the second floor in this manner, the dolly 52 is also lifted and moved to the second floor by the lifting frame F'. Then, as shown in FIG. 6k, the large slab/beam formwork 13 is raised using a dolly 52, and the slab formwork 15 and beam side formwork 17 of the large slab/beam formwork 13 are raised.
As described above, a hydraulic jack is stretched between the two and the hydraulic jack is extended, and the beam side formwork 17 connected and supported at the tip of the telescopic tube 18 is advanced along the lower side of the preparation formwork 16. , located above the formwork panel 4 of the large column formwork 1. Next, at Dori 52, Figure 6
As shown in the figure, the table 14 is lowered, and the large slab
The entire beam formwork 13 is set at a predetermined height, and the beam side formwork 17 is connected to the formwork panel 4 and beam bottom formwork 40 of the large column formwork 1 that has already been set. In addition, the beam formwork 42 has already been assembled at the front and rear ends of the slab formwork 15.
combine. At this time, a tapered beam side formwork 51 for demolding is attached to the end of the beam side formwork 17 of the large slab/beam formwork 13.
(See Figure 6 f). Next, the beam side formwork 17
A spacing formwork 34 is installed within the preparation formwork 16 between the slab formwork 15 and the slab formwork 15 .

Next, slab reinforcing bars and beam reinforcing bars are placed above the slab formwork 15 and inside each beam formwork, and the first floor external beam side formwork panel 43 (see Figure 6 f) is removed and transported to the second floor. Then, as shown in Fig. 6l, the beam side formwork 17 of the already set large slab/beam formwork
It is connected with tie bolts 53 and is connected and supported to a wide formwork panel 4 located on the outer surface of the building of the large column formwork 1. The hanger 38 movably attached to the hanger rail 37 at the lower end of the external beam side formwork panel 43 is attached to the hanger mounting bracket 10 of the wide formwork panel 4 located on the outside of the building of the large column formwork 1. join to. Also large slab/beam formwork 1
The dolly 52 under the table 14 of No. 3 is moved to an appropriate position. Thereafter, concrete for the second floor frame is poured in one step on the inside of each large column formwork 1 and each beam formwork, and on the upper side of each slab formwork 15, and is cured.

Thereafter, the above steps are repeated to construct a frame structure with the required number of floors.

As can be seen from the above explanation, the construction method using the large assembled formwork of the present invention consists of the large assembled formwork consisting of the large assembled column formwork and the large assembled slab/beam formwork, and the large assembled column formwork is composed of the large assembled column formwork and the large assembled column formwork. The slab/beam formwork is moved along the hanger rail attached to the slab/beam formwork to the opening of the frame structure, and the large slab/beam formwork supports the beam side formwork at both ends so that it can move forward and backward, and the entire slab/beam formwork is turned into a table. These large formworks can be easily lifted and moved to a predetermined position on the upper floor using a lifting frame, and then assembled and set. Then, move and assemble the small formwork such as the beam bottom formwork in the running direction of the large column column formwork, the beam formwork at the longitudinal end of the large slab/beam formwork, and the external beam side formwork panels. Just by combining, 1
Concrete building blocks such as columns, beams, slabs, etc. for each floor are 1
Can be cast in one turn. Therefore, construction is extremely simplified, construction efficiency is significantly improved, and the construction period can be significantly shortened. Moreover, depending on the curing period, the large column column formwork is removed first, and then the large group slab/beam form is removed. It has the excellent effect of allowing the frame to be removed from the mold and moved.

In addition, the construction method using the large assembled formwork of the present invention is based on the large assembled slab structure with the beam side formwork slidably supported at both ends.
Since beam formwork is used, if the area of the slab to be constructed on each floor changes, by moving the beam side formwork at both ends as appropriate, and by changing the length of the slab formwork at the front and rear ends. That is, by appropriately increasing or decreasing the number of steel formworks to be combined and joined at the front and rear ends, a slab of the required area can be easily constructed.

Furthermore, the construction method using large assembled formwork of the present invention uses large assembled column formwork that can be opened and closed on two sides that run along the hanger rails at both ends of the large slab/beam formwork. Even if there is column concrete or tables supporting large slabs or beam formwork, the column can run smoothly to the opening of the frame structure, avoiding the column concrete poured in the narrow space between adjacent tables. It can be moved and demolding is extremely easy. What's more, when the large column formwork is lifted to the upper floor using a lifting frame and moved to the specified position, it can be installed surrounding the reinforcing bars that have been arranged in advance, making it extremely easy to work with, and the most labor-intensive column. The setup work for concrete pouring is significantly simplified.

[Brief explanation of drawings]

Figure 1 shows the large assembled column formwork, a is a perspective view, b is a plan view, Figure 2 is a partially cutaway perspective view showing the large assembled slab/beam formwork, and Figure 3 is the large assembled column formwork. Figure 4 is a top perspective view showing the beam bottom formwork in the running direction of the formwork, Figure 4 is a top perspective view showing the beam formwork at the front and rear ends of the large slab/beam formwork, and Figure 5 is the outside of the building. FIGS. 6a to 6l are perspective views of the external beam-side formwork panel located at , and are diagrams showing the steps of the construction method using the large-scale formwork of the present invention. 1... Large column formwork, 2... Steel formwork, 3... Thick timber, 4... Wide formwork panel, 5... Narrow formwork panel, 5a... Angle material, 6 ... Hinge plate, 7 ... Long hole, 8 ... Hinge bolt, 9
...Tie bolt, 10...Hanger mounting bracket, 1
1... Hanging fittings, 13... Large slab/beam formwork,
14...Table, 14a...Big draw, 15...
Slab formwork, 16... Preparation formwork, 17... Beam side formwork, 18... Expansion pipe, 22... Connector, 30...
...Handcart, 34... Spacing formwork, 37... Hanger rail, 38... Hanger, 39... Roller, 40... Beam bottom formwork, 41a... Steel formwork, 4
1b... L-shaped steel formwork, 42... Beam formwork, 42
a...L-shaped beam side steel formwork, 42a'...beam side steel formwork with taper for demolding, 42b...beam side steel formwork,
42c... Beam bottom steel formwork, 43... External beam side formwork panel, 45... Pillow, 46... Corner angle, 47... Column reinforcing bar, 48... Kitsuka, 49...
...Support, 50...Corner angle, 51...
...Tapered beam side formwork for demolding, 52...Dolly, B
...Main structure, F, F'...Lifting frame, W...Hanging cable.

Claims (1)

[Scope of Claims] 1. A large slab/beam formwork in which a beam side formwork is supported under adjustment formworks at both left and right ends of the slab formwork supported on a table so that it can move forward and backward, and the beam side formwork. A large column column formwork that is suspended from a hanger rail on the outside of the lower end and has formwork panels on both sides in the running direction that can be opened and closed, and a beam bottom formwork in the running direction of the large column column formwork. After pouring and curing concrete for the first floor frame by combining the beam formwork at the front and back ends of the large slab/beam formwork and the formwork on the external beam side of the building, each large column column formwork is removed. The process of molding, opening the formwork panel in the running direction, and moving it sequentially to the opening of the building on the hanger rail, and further moving one side of each large column formwork that has been moved above to the outside of the building. After closing the open formwork panel on one side, the large column formwork is lifted up using a lifting frame, and lowered to the specified position where the reinforcing bars are arranged on the second floor, and the open formwork panel on the other side is closed. The process involved closing and setting the formed formwork panels, removing the beam bottom formwork between the large column formworks on the first floor, moving it to the second floor, and setting it between the large column formworks.
In addition, the process of demolding and dismantling the beam formwork at the front and rear ends of the large slab/beam formwork, moving it to the second floor and assembling it, and the process of removing the beam side molds at both ends of the large slab/beam formwork. The frame is moved back and demolded, a dolly is placed under the table, and the entire slab/beam formwork for each table is lowered by the dolly, the slab formwork is demolded, and it can pass under the beam at the end in the front and back direction. After that, the process of moving the dolly to the opening of the building one by one, and lifting the large slab and beam formwork moved to the opening of the building one by one with the lifting frame together with the table, It was lowered to a predetermined position on the second floor, the beam side formwork at both ends of the large slab/beam formwork was advanced by a predetermined amount, and a dolly was placed below the table, and the table was lowered by the dolly. The slab formwork is set at a predetermined height, the beam side formwork is connected to the already set large column formwork and the beam bottom formwork, and the longitudinal ends of the slab formwork are attached to the assembled beam formwork. After that, the first floor external beam side formwork was demolished and set in the specified position on the second floor, and after reinforcing bars were placed above the slab formwork and inside the beam formwork, large-scale assembly was carried out. The process of pouring and curing the second-story frame concrete inside the column formwork and beam formwork and above the slab formwork, and repeating the following steps to construct a frame structure with the required number of floors. A construction method using large formwork.