CN113250050B - A technical method for airport pavement assembly replacement plate replacement - Google Patents

Abstract

The invention discloses an airport pavement assembled plate replacement updating technical method which comprises the steps of prefabricating a pavement plate, cutting and separating an old plate, removing the old plate, cleaning a base, installing a positioning support, paving a self-leveling quick-setting mortar binding layer, installing the plate and standing and maintaining. The pavement slab is prefabricated in advance, and the stress state of the slab bottom of the prefabricated pavement slab is improved through the groove design of the slab bottom, so that leveling and drainage are facilitated. The old plate is cut and separated, which is suitable for replacing large-area plates and quickly separating and replacing local plates, and ensures the fit between the reserved groove and the plate; the installation of the positioning support is convenient for quickly leveling the four corners of the plate, and the prerequisite support is improved for the installation of the plate; laying the self-leveling quick-setting mortar combined layer, not only improving the higher flatness of the top surface of the base layer locally and integrally, but also shortening the processing time of the base surface by adopting a quick-setting material. The technical method of the invention ensures that the old plate surface of the airport pavement is straightly separated, the plate block is quickly leveled, and is mechanically and quickly placed, thereby achieving the purpose of quickly replacing and repairing the plate.

Description

A technical method for airport pavement assembly replacement plate replacement

technical field

The invention relates to the technical field of airport pavement construction, in particular to an airport pavement assembly-type plate replacement update technology method.

Background technique

With the rapid development of the economy, more and more airports are being built. During the use of the airport pavement, although the structural strength of the pavement is relatively good, with the accumulated use of the airport pavement, the surface of the airport concrete pavement will fall off or crack. At this time, the concrete pavement of the airport needs to be maintained or repair. For the repair of airport concrete pavement, if local slabs are damaged, the old slabs are generally removed and new slabs are poured on site. If the old slabs are repaired in a large area, the construction is generally "covered"; before the non-stop construction is required, the operating time is limited and the cast-in-place New slabs need time to harden and condense, and regardless of the size of the work, it involves mixing and transportation of the concrete mixing station, wet work on site, and is likely to cause pollution. For the repair of airport concrete pavement, there are also domestic measures to use prefabricated slabs to hoist, but it is limited to individual slabs, and the precision of the hoisting process and equipment is not high, and the time for entering the groove is too long, which affects the efficiency of slab replacement.

Contents of the invention

The purpose of the present invention is to provide an airport pavement assembly-type plate replacement update technology method, which can replace and repair the original old plates in the local and large areas of the airport, so that the old plates can be straightly separated, the plates can be quickly leveled, and the mechanization is fast. Placed, so as to achieve the purpose of quick plate replacement repair.

In order to achieve the above object, the present invention adopts the technical solution as follows:

An airport pavement assembly-type replacement slab renewal technology method, characterized in that the pavement slab is prefabricated in the early stage, and the old slab is cut and separated, the old slab is removed and the base is cleaned for the concrete pavement that needs to be replaced, so as to realize the rapid and accurate removal of the old pavement ; Install the positioning support of the pavement in the base, lay the self-leveling fast-setting mortar bonding layer, and realize the rapid repair of the old pavement area through the installation of the prefabricated pavement block and the static maintenance after installation.

Preferably, the technical method for changing boards is applicable to the replacement maintenance of original old boards in local areas or large areas of airport pavement, through the straight separation of old boards, rapid leveling of boards and installation of mechanical placement equipment Use to achieve fast, accurate, safe and efficient repair of prefabricated pavement panels in old pavement areas.

Preferably, the content steps of said road panel prefabrication include:

Step A1, determining the matching number of pavement blocks to be prefabricated according to the damaged area of the airport pavement to be processed;

Step A2, use the prefabrication factory to produce the prefabricated road panel blocks, and determine that the processing accuracy of the prefabricated road panel blocks is controlled to be surface flatness ≤ 2mm/3m;

Step A3, when processing the prefabricated path panel block, a water tank is provided at the bottom of the prefabricated path panel block to facilitate drainage between layers; a slurry storage groove is provided at the bottom of the precast path panel block, and excess quick-setting mortar can be stored during the subsequent paving process materials; during the prefabrication process, the top surface is brushed to improve the friction coefficient of the plate.

Preferably, the method for cutting and separating control of the old plate includes as follows:

Step B1, combined with the size of the damaged slab and the modulus of the prefabricated slab, use concrete pavement cutting equipment to accurately cut and separate the old pavement to replace the concrete pavement slab and the surrounding slabs;

Step B2, when the concrete pavement cutting equipment is cutting, use a cutting machine straightening and leveling device and a laser level to accurately control the straightness and size requirements of the cutting separation;

Step B3, if the board is replaced in a large area, it is necessary to divide the total area into construction units, flow construction, and control the unit time of board replacement.

Preferably, the content of the old plate removal includes as follows:

Step C1, after cutting with cutting equipment, the old road panels that need to be replaced after cutting are broken and decomposed by crushing equipment;

Step C2, before cutting, protect the surrounding plates around the old pavement that needs to be cut. During protection, mark lines and protective pads can be set on the surrounding plates; For small fine crushing equipment, pay attention to the protection of surrounding plates;

Step C3, when partially changing the board, considering the connection between the prefabricated board and the original cast-in-place board, pre-embed the connectors in the original surrounding panels in advance;

When changing panels in a large area, the connectors are the connections between the prefabricated panels, and the connectors are pre-embedded and processed in advance when the pavement panels are prefabricated;

Step C4, for the replacement of large-area road panels, match the working area of each flow unit, calculate the discarded materials that need to be removed in the working surface of each cycle, and ensure the timely transportation of discarded materials.

Preferably, the control content of the substrate cleaning includes as follows:

Step D1, after transporting the broken residue of the old pavement outside, clean up the base by means of cleaning and cleaning;

Step D2, if it is a large-area plate replacement, it is necessary to match the operating area of each assembly line operation unit, and calculate the cleaning of each cycle and the outward transportation of discarded materials.

Preferably, the installation content of the positioning support of the road panel includes the following:

Step E1, the positioning support of the road panel is a special mushroom-shaped support, determine the installation position of the positioning support, and perform pre-support positioning;

Step E2, according to the four-point positioning of the plate and combined with on-site precision measurement, implant the bearing into the base layer below the airport pavement.

Preferably, the laying control method of the self-leveling quick-setting mortar bonding layer includes as follows:

Step F1, using quick-setting mortar as the laying layer to shorten the construction period;

Step F2, laying self-leveling quick-setting mortar in the base as a bonding layer between the base and the prefabricated plate;

Step F3, through the dual control of the self-leveling elevation at the bottom of the slab and the elevation of the top of the prefabricated slab, the installation requirements for high flatness of the slab are met;

Step F4, for the excess and squeezed quick-setting mortar during the plate leveling process, the grout can be stored in the groove at the bottom of the plate.

Preferably, the installation content of the prefabricated path panel block includes the following:

In step G1, special pavement panel hoisting equipment is used, the hoisting accuracy of which is controlled at the millimeter level, and the hoisting equipment can be moved by tire type, track type or combined type;

Step G2, extracting, moving, locating and hoisting the road panel by hoisting equipment;

In step G3, the panels are installed in the areas to be installed in turn, and the hoisting equipment leaves the hoisting site after the installation is completed;

In step G4, after the road panels in the installation area are installed, let them stand for maintenance for 1.0 hours, and then the navigation can be resumed.

Preferably, the cutting machine straightening and leveling device includes a cutting positioning frame, which is in the shape of a square frame, and the cutting positioning frame includes four cutting and positioning I-beams, and the upper end of each cutting and positioning I-beam is provided with Connect the oblique rod, and each two adjacent cutting and positioning I-beams are fixed through the positioning bolts in the connecting oblique rod;

An angle steel track is set on each cutting and positioning I-beam, and two laser levels are fitted on the side ends of each cutting and positioning I-beam, and the two laser levels are respectively connected to the cutting and positioning position through sliding positioning supports. the front and rear sides of the I-beam;

The cutting equipment includes a cutting machine body, a counterweight guide bracket connected to the front end of the cutting body, and a roller guide rod assembly connected to the upper side of the counterweight guide bracket. The rollers of the roller guide rod assembly are adapted to connect with the angle steel track.

The beneficial effects of the present invention are:

The airport pavement assembly-type replacement slab update technology method in the present invention not only improves the concrete forming strength by adopting the prefabrication of the pavement slab, but also improves the stress state of the slab bottom of the prefabricated pavement slab through the design of the groove at the bottom of the slab, and at the same time Easy to level and drain. The cutting and separation of old plates is not only suitable for large-area plate replacement, but also conducive to the rapid separation and replacement of partial plates, ensuring the fit between the reserved groove and the plate. The installation of the positioning support facilitates the rapid leveling of the four corners of the plate and improves the preliminary support for the plate installation. Laying a self-leveling fast-setting mortar bonding layer not only improves the flatness of the top surface of the base layer locally and as a whole, but also shortens the treatment time of the base surface by using fast-setting materials; the board installation adopts professional hanging board equipment, which greatly improves the replacement of boards. The speed further improves the rapid repair of the airport under non-stop construction conditions.

Description of drawings

In order to clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are the present For some embodiments of the invention, those skilled in the art can also obtain other drawings based on these drawings without creative effort.

Figure 1 is a block diagram of the overall process flow of the airport pavement assembly-type plate replacement update technology method.

Fig. 2 is a schematic diagram of the structural position of the concrete pavement cutting equipment and the straightening and leveling device of the cutting machine.

detailed description

The present invention provides an airport pavement assembly-type board-renewing technical method. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The present invention is described in detail below in conjunction with accompanying drawing:

Example 1

Combined with Figure 1, an airport pavement assembly-type replacement slab renewal technology method, the pavement slab is prefabricated in the early stage, and the old slab is cut and separated, the old slab is removed and the base is cleaned for the concrete pavement that needs to be replaced, so as to realize the rapid and accurate removal of the old pavement ; Install the positioning support of the pavement in the base, lay the self-leveling fast-setting mortar bonding layer, and realize the rapid repair of the old pavement area through the installation of the prefabricated pavement block and the static maintenance after installation.

The technical method of plate replacement and updating is suitable for the replacement maintenance of the original old plates in local areas or large areas of the airport pavement. Fast, precise, safe and efficient repair of precast pavement panels in old pavement areas.

Example 2

Combined with Figure 1, an airport pavement assembly-type replacement slab renewal technology method, the pavement slab is prefabricated in the early stage, and the old slab is cut and separated, the old slab is removed and the base is cleaned for the concrete pavement that needs to be replaced, so as to realize the rapid and accurate removal of the old pavement ; Install the positioning support of the pavement in the base, lay the self-leveling fast-setting mortar bonding layer, and realize the rapid repair of the old pavement area through the installation of the prefabricated pavement block and the static maintenance after installation.

The content steps of road slab prefabrication include: step A1, determine the matching quantity of pavement slabs to be prefabricated according to the damaged area of the airport pavement to be processed; The processing accuracy is controlled so that the surface flatness is less than or equal to 2mm/3m; step A3, when processing the prefabricated road panel block, the bottom of the prefabricated road panel block is provided with a water tank to facilitate drainage between layers; the bottom of the prefabricated road panel block is provided with a slurry storage groove, In the subsequent paving process, the excess quick-setting mortar material can be stored; the top is roughened during the prefabrication process to improve the friction coefficient of the plate.

The method for controlling the cutting and separation of old slabs includes the following steps: Step B1, combining the size of the damaged slab and the modulus of the prefabricated slab, using concrete pavement cutting equipment, for the old pavement, the concrete pavement slab needs to be replaced and the surrounding slabs are accurately cut and separated; Step B2, When cutting with the concrete pavement cutting equipment, use the straightening and leveling device of the cutting machine and the laser level to accurately control the straightness and size requirements of the cutting separation; step B3, if the board is replaced in a large area, the total area needs to be divided into construction Unit, flow construction, control the unit time of board replacement.

The content of the removal of old panels includes the following: step C1, after cutting with cutting equipment, use the crushing equipment to break and decompose the old road panels that need to be replaced after cutting; step C2, protect the surrounding panels around the old road surface that needs to be cut before cutting, During protection, marking lines and protective pads can be set on the surrounding plates; when crushing with crushing equipment, pay attention to the position of the marking lines and protective pads, use small fine crushing equipment when crushing the edge, and pay attention to the protection of surrounding plates; When replacing slabs, considering the connection between prefabricated slabs and original cast-in-place slabs, the connectors are pre-embedded in the surrounding original road panels in advance; When the panels are prefabricated, the connectors are pre-embedded and processed in advance; step C4, for the replacement of large-area road panels, match the working area of each flow unit, calculate the discarded materials that need to be removed in the working surface of each cycle, and ensure the timely transportation of discarded materials .

The control content of the base cleaning includes the following: step D1, after the broken residue of the old pavement is transported outside, use cleaning, cleaning and other methods to clean the base; The operating area, calculate the cleaning of each cycle and the export of discarded materials.

The installation content of the positioning support of the road panel includes the following: step E1, the positioning support of the road panel is a special mushroom-shaped support, determine the installation position of the positioning support, and perform pre-support positioning; step E2, locate according to the four points of the plate, and Combined with on-site precision measurement, the bearing is implanted into the base layer below the airport pavement.

The laying control method of the self-leveling quick-setting mortar bonding layer includes the following steps: step F1, using quick-setting mortar as the laying layer, shortening the construction period; step F2, laying self-leveling quick-setting mortar in the base, as the combination of the base and the prefabricated plate layer; Step F3, through the dual control of the self-leveling elevation at the bottom of the slab and the elevation of the prefabricated slab top, the installation requirements for high flatness of the slab are met; Step F4, for the excess and extruded quick-setting mortar in the leveling process of the slab, its slurry It can be stored in the groove on the bottom of the plate.

The content of the installation of prefabricated road panel blocks includes the following: Step G1, use special road panel hoisting equipment, the hoisting accuracy is controlled at the millimeter level, and the hoisting equipment can adopt tire-type, rail-type or combined moving methods; Step G2, through Hoisting equipment, extracting, moving, positioning and hoisting the road panels; step G3, installing the road panels in the area to be installed in sequence, and after the installation is completed, the hoisting equipment leaves the hoisting site; step G4, installing the road panels in the installation area After finishing, let it stand for 1.0 hour for maintenance, and then the navigation can be resumed.

Example 3

Combining Figure 1 and Figure 2, an airport pavement assembly-type replacement slab renewal technology method, the pavement slab is prefabricated in the early stage, and the old slab is cut and separated, the old slab is removed and the base is cleaned for the concrete pavement that needs to be replaced, so as to realize the rapid replacement of the old pavement. Accurate removal; installation of pavement slab positioning support, laying of self-leveling quick-setting mortar bonding layer in the base, and rapid repair of old pavement area through installation of prefabricated pavement slab blocks and static maintenance after installation.

The content steps of road slab prefabrication include: step A1, determine the matching quantity of pavement slabs to be prefabricated according to the damaged area of the airport pavement to be processed; The processing accuracy is controlled so that the surface flatness is less than or equal to 2mm/3m; step A3, when processing the prefabricated road panel block, the bottom of the prefabricated road panel block is provided with a water tank to facilitate drainage between layers; the bottom of the prefabricated road panel block is provided with a slurry storage groove, In the subsequent paving process, the excess quick-setting mortar material can be stored; the top is roughened during the prefabrication process to improve the friction coefficient of the plate.

The method for controlling the cutting and separation of old slabs includes the following steps: Step B1, combining the size of the damaged slab and the modulus of the prefabricated slab, using concrete pavement cutting equipment, for the old pavement, the concrete pavement slab needs to be replaced and the surrounding slabs are accurately cut and separated; Step B2, When the concrete pavement cutting equipment 1 is cutting, use the cutting machine straightening and leveling device 2 and the laser level 3 to accurately control the straightness and size requirements of the cutting separation; step B3, if the board is replaced in a large area, the total The area is divided into construction units, flow-through construction, and the unit time for plate replacement is controlled.

The straightening and leveling device 2 of the cutting machine comprises a cutting positioning frame 21, which is in the shape of a square frame, and the cutting positioning frame includes four cutting and positioning I-beams 22, and each cutting and positioning I-beam 22 upper ends are provided with Connecting oblique rods 23, every two adjacent cutting and positioning I-beams 22 are fixedly connected by positioning bolts in the connecting oblique rods.

An angle steel track 24 is set on each cutting and positioning I-beam 22, and two laser levels 3 are fitted to the side ends of each cutting and positioning I-beam 22, and the two laser levels 3 pass through the sliding positioning support 31 respectively. Attached to the front side and rear side of the cut-to-position I-beam.

Described cutting equipment 1 comprises cutting machine body 11, the counterweight guide bracket 12 that is connected on the upper end of cutting body 11 and the roller guide rod assembly 13 that is connected on the upper side end of counterweight guide bracket 12, and the roller 14 of roller guide rod assembly 13 and The angle steel track 24 is adapted to connect.

The invention not only improves the strength of concrete forming by adopting the prefabrication of the road slab, but also improves the stress state of the slab bottom of the prefabricated road slab through the design of the groove at the bottom of the slab, and at the same time facilitates leveling and drainage; cutting and separating the old slabs is not only applicable For large-area panel replacement, it is more conducive to the rapid separation and replacement of partial panels, ensuring the fit between the groove and the panel; the installation of positioning supports facilitates the rapid leveling of the four corners of the panel, and improves the prerequisite support for the installation of the panel; laying self-leveling fast The cemented mortar bonding layer not only improves the flatness of the top surface of the base layer locally and as a whole, but also shortens the treatment time of the base surface by using fast-setting materials; the plate installation adopts professional hanging plate equipment, which greatly increases the speed of plate replacement and further improves Rapid repair of airports under non-stop construction conditions.

Of course, the above descriptions are not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention shall also belong to the present invention. protection scope of the invention.

Claims (5)

1. An airport pavement assembled plate-changing updating technical method is characterized in that pavement plates are prefabricated in the early stage, and concrete pavement needing to be replaced is subjected to old plate cutting separation, old plate cleaning and base cleaning, so that the old pavement is quickly and accurately removed; installing a pavement slab positioning support and laying a self-leveling quick-setting mortar binding layer in the substrate, and realizing quick repair of an old pavement slab area through installation of a prefabricated pavement slab and standing maintenance after installation;

the method for controlling the cutting and separating of the old plate comprises the following steps:

step B1, combining the size of the damaged plate and the modulus of the prefabricated plate, and accurately cutting and separating the old pavement slab needing to be replaced and the surrounding plates by using concrete pavement cutting equipment;

step B2, when the concrete pavement cutting equipment cuts, a cutting machine straightening and leveling device and a laser level meter are used in a matched mode, and the straightening degree and the size requirements of cutting separation are accurately controlled;

step B3, if the plate is changed in a large area, dividing the total area into construction units, carrying out flow construction, and controlling the unit time of plate changing;

the contents of the old plate removal include the following:

step C1, after cutting by adopting cutting equipment, crushing and decomposing the cut panel needing to be replaced by the crushing equipment;

step C2, protecting peripheral boards around the old pavement to be cut before cutting, wherein marking lines and protecting pads can be arranged on the peripheral boards during protection; when crushing is carried out by using crushing equipment, attention is paid to marking positions of lines and protection pads, and when edges are crushed, small-sized fine crushing equipment is used for protecting surrounding plates;

step C3, when the plates are partially changed, the connecting pieces are pre-buried into the original road panels around in advance in consideration of the connection between the precast plates and the original cast-in-place plates;

when large-area slab replacement is carried out, the connecting pieces are connected among prefabricated slabs, and when the pavement slabs are prefabricated, the connecting pieces are pre-buried in advance;

c4, for large-area pavement slab replacement, matching the operation area of each flow unit, calculating the abandoned material to be removed in each circulation operation surface, and ensuring timely outward transportation of the abandoned material;

the mounting contents of the pavement slab positioning support comprise the following steps:

e1, the pavement slab positioning support is a special mushroom-shaped support, the mounting position of the positioning support is determined, and pre-supporting positioning is carried out; e2, according to the four-point positioning of the plate, and combining with on-site precision measurement, implanting the support into a base layer below the airport pavement;

the laying control method of the self-leveling quick-setting mortar bonding layer comprises the following steps:

step F1, adopting quick-setting mortar as a laying layer to shorten the construction period; f2, laying self-leveling quick-setting mortar in the substrate to serve as a bonding layer of the base layer and the prefabricated plate; step F3, the high-flatness installation requirement of the plate is met through double control of the self-leveling elevation of the bottom of the plate and the top elevation of the prefabricated plate; f4, collecting slurry of redundant extruded quick-setting mortar in the plate leveling process in a groove at the bottom of the plate;

the straightening and leveling device of the cutting machine comprises a cutting positioning frame, the cutting positioning frame is in a square frame shape and comprises four cutting positioning I-shaped steel beams, the upper end part of each cutting positioning I-shaped steel beam is provided with a connecting inclined rod, and every two adjacent cutting positioning I-shaped steel beams are fixedly connected through a positioning bolt in the connecting inclined rod;

an angle steel plate rail is arranged on each cutting positioning I-shaped steel beam, two laser levels are matched with the side end of each cutting positioning I-shaped steel beam, and the two laser levels are connected to the front side end and the rear side end of each cutting positioning I-shaped steel beam through sliding positioning supports respectively;

the cutting equipment comprises a cutting machine body, a counterweight guide support and a roller guide rod assembly, wherein the counterweight guide support is connected to the upper front end of the cutting body, the roller guide rod assembly is connected to the upper side end of the counterweight guide support, and a roller of the roller guide rod assembly is in adaptive connection with the angle steel plate rail.

2. The assembled plate-changing and renewing technique for airport pavement according to claim 1 is suitable for the replacement and repair of old plate blocks in local or large area of airport pavement, and can realize the fast, accurate, safe and efficient repair of the prefabricated pavement slab in the area of the old pavement by the straight detachment of the old plate blocks and the use of the fast leveling and mechanical placing equipment of the plate blocks.

3. The method of claim 1, wherein the step of prefabricating the pavement slab comprises:

step A1, determining the matching number of pavement plates to be prefabricated according to the damaged area of the airport pavement to be processed;

step A2, producing the prefabricated pavement slab block by adopting a prefabrication factory, and determining that the machining precision of the prefabricated pavement slab block is controlled to be less than or equal to 2mm/3m in surface flatness;

step A3, when the prefabricated pavement slab is processed, a water flowing groove is arranged at the bottom of the prefabricated pavement slab, so that interlayer drainage is facilitated; the bottom of the prefabricated pavement slab is provided with a slurry storage groove, and redundant quick-setting mortar can be stored in the subsequent paving process; and in the process of prefabricating the top, surface roughening treatment is carried out, so that the friction coefficient of the plate is improved.

4. The airport pavement assembled change plate updating technology method of claim 1, wherein the control content of the substrate cleaning comprises the following:

d1, carrying out base cleaning by adopting modes of cleaning, cleaning and the like after the crushed residues of the old road surface are transported outside;

and D2, if the plate is changed in a large area, matching the working area of each line production unit, and calculating the cleaning of each cycle and the outward transportation of the waste materials.

5. The method of claim 1, wherein the contents of the installation of the prefabricated pavement slab comprises the following steps:

g1, adopting special road surface plate hoisting equipment, wherein the hoisting precision is controlled to be in millimeter level, and the hoisting equipment can adopt a tire type, rail type or combined type moving mode;

g2, extracting, moving, positioning and hoisting the pavement slab through hoisting equipment;

g3, sequentially installing the pavement slab on the area needing to be installed, and driving the hoisting equipment away from a hoisting site after the installation is finished;

and G4, after the pavement slab in the installation area is installed, standing and maintaining for 1.0 hour, and then recovering navigation.

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