A highway slab beam replacement construction method and abutment support device

Abstract

The present invention provides a highway slab beam replacement construction method and a bridge abutment support device, the specific method of which is to adopt a construction method of skipping holes to remove and replace the slabs, symmetrically arrange the abutment support mechanisms from both sides of the abutment to the center, place the abutment support mechanisms after the slab beams are removed to a certain width on the outside, then place the second batch of abutment support mechanisms after the slab beams near the middle are removed, and so on until the removal is completed, and the order is reversed during installation, first installing the slab beams and then removing the support mechanisms from the middle to both sides, until the new slab beams are installed. The present invention can effectively avoid the situation where the abutment body tilts forward after the upper slab beams are removed, and ensure that after the slab beams are removed, the abutment will not have structural stress cracks under the lateral pressure of the backfill soil on the abutment, and is simple to implement, highly practical, and can be made of local materials, with low cost, and easy to promote and implement.

Description

Technical Field

[0001] The invention belongs to the technical field of highway construction, and in particular relates to a highway slab beam dismantling and replacement construction method and a bridge abutment supporting device. Background Art

[0002] As the load level of the highway changes, in order to meet the traffic performance of the highway, more and more slab beams need to be replaced. In the specific replacement construction process, after the upper slab beam is removed, the abutment body tends to tilt forward. At the same time, the abutment will experience structural stress cracks under the lateral pressure of the backfill soil on the back of the abutment, shortening the life of the abutment. The abutment needs to be repaired or re-cast, affecting the installation quality and efficiency of the new slab beam, thereby affecting the safe use of the entire highway. Therefore, how to safely replace the slab beam while ensuring the safety of the abutment and preventing deformation so that the highway can be put into use quickly has become a technical focus that needs to be solved. Summary of the invention

[0003] The present invention provides a highway slab beam replacement construction method and an abutment support device, which can effectively prevent the abutment body from tilting forward after the upper slab beam is removed, and ensure that after the slab beam is removed, the abutment will not develop structural stress cracks under the lateral pressure of the backfill soil on the abutment back.

[0004] The technical scheme of the present invention is: a highway slab beam replacement construction method, the abutment support mechanism is symmetrically arranged from both sides of the abutment to the center, the abutment support mechanism is placed after the slab beam is removed to a certain width on the outside, and then the slab beam near the middle is removed and the second batch of abutment support mechanisms are placed, and the construction process adopts a skip hole interval removal and replacement method, which specifically includes slab beam removal and slab beam installation;

[0005] The steps of removing the plate beam include:

[0006] (1) The slab beams to be removed are numbered in sequence from both sides to the middle, such as simply supported slab beam 1#, simply supported slab beam 2#, etc. The numbering method is skip hole spacing;

[0007] (2) Remove each section of the slab beam in sequence until it is completely removed. Install the support structure while removing the slab beam to ensure that the abutment where the slab beam is removed is supported to avoid the abutment tilting forward or the abutment causing structural stress cracks under the lateral pressure of the backfill soil behind the abutment;

[0008] The steps of installing the plate beams include: installing the plate beams from the middle to both sides in sequence, first installing the plate beams where no supporting mechanism is set, removing the nearby supporting mechanism after the installation is completed, then installing other plate beams, removing the nearby supporting mechanism, and repeating this cycle until all the plate beams are installed.

[0009] Another aspect of the present invention provides a highway slab girder replacement abutment support device, comprising a support mechanism and a slab girder arranged on the abutment, the support mechanism being arranged in a skip-hole interval manner, the abutment comprising an abutment cap, an abutment body, a pedestal, and a foundation, the support mechanism being arranged on the abutment cap, the slab girder being cut into a plurality of simply supported slab girder blocks, and the support mechanism being arranged in skip-hole intervals below the simply supported slab girder blocks.

[0010] The solution further comprises a spiral steel pipe, a fixed end arranged at one end of the spiral steel pipe, a fastening end arranged at the other end of the spiral steel pipe, an adjusting end connected to the fastening end, and a wedge-shaped fastener for limiting and fixing. The fixed end comprises a fixed end bolt, a fixed end fixing plate, a fixed end stiffening plate, and a fixed end screw hole. The fixed end fixing plate is arranged at the end of the spiral steel pipe. The fixed end stiffening plate is symmetrically arranged between the spiral steel pipe and the fixed end fixing plate. A plurality of fixed end screw holes are evenly arranged on the fixed end fixing plate. The fixed end bolt passes through the fixed end screw hole to anchor the fixed end to the abutment cap. The fastening end comprises Two fastening end limit plates and a fastening end fixing plate, the two fastening end limit plates are vertically arranged at intervals on the end surface of the fastening end fixing plate, the adjusting end includes an adjusting end fixing plate, an adjusting end limit plate, an adjusting end stiffening plate, an adjusting end bolt, and an adjusting end screw hole, the adjusting end limit plate is connected to the fastening end fixing plate, the adjusting end limit plate and the adjusting end fixing plate are perpendicular, the adjusting end stiffening plate is arranged between the adjusting end limit plate and the adjusting end fixing plate and between the adjusting end limit plates, and a plurality of adjusting end screw holes are evenly arranged on the adjusting end fixing plate, and the adjusting end bolts pass through the adjusting end screw holes to anchor the adjusting end to the abutment cap.

[0011] In a further embodiment, a plurality of fastening end stiffening plates are provided between the fastening end limiting plate and the fastening end fixing plate.

[0012] According to a further solution, the spacing between the two fastening end limit plates is the same as the outer diameter of the spiral steel pipe, and the fastening end limit plates are welded and fixed to the outer side wall of the spiral steel pipe.

[0013] According to a further solution, the spiral steel pipe is a hollow structure.

[0014] In a further solution, the fastening end fixing plate is provided with two slots, and the adjusting end limiting plate is inserted into the slots to achieve connection.

[0015] According to a further solution, the fixed end fixing plate, the fastening end fixing plate and the adjusting end fixing plate are rectangular.

[0016] According to a further solution, the number of the fixing end screw holes and the adjusting end screw holes is 4.

[0017] In a further solution, the adjusting end stiffening plate includes a rectangular plate and a triangular plate, the rectangular plate is arranged between the adjusting end limit plates, and the triangular plate is arranged on the other side.

[0018] The advantages of the present invention are as follows: the present invention adopts the method of removing and replacing plates at intervals by skipping holes, and symmetrically arranges the abutment support mechanisms from both sides of the abutment to the center. The abutment support mechanisms are placed after the plate beams are removed to a certain width on the outside, and then the second batch of abutment support mechanisms are placed after the plate beams in the middle are removed until the removal is completed. The installation sequence is reversed, which can effectively avoid the situation where the abutment body tilts forward after the upper plate beams are removed, and ensure that after the plate beams are removed, the abutment will not have structural stress cracks under the lateral pressure of the backfill soil on the abutment back. The implementation is simple, the practicability is strong, and local materials can be used, the cost is low, and it is easy to promote and implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of the transverse structure of a highway slab beam replacement abutment support device;

[0020] Figure 2 The present invention is a schematic diagram of the longitudinal structure of a highway slab beam replacement abutment support device;

[0021] Figure 3 yes Figure 1 and Figure 2 Structural diagram of the middle support mechanism;

[0022] Figure 4 yes Figure 3 Schematic diagram of the fixed end structure of the middle support mechanism;

[0023] Figure 5 yes Figure 3 A schematic diagram of the radial cross-section structure of the fixed end of the middle support mechanism;

[0024] Figure 6 yes Figure 3 Schematic diagram of the adjustment end structure of the middle support mechanism;

[0025] Figure 7 yes Figure 3 Schematic diagram of the radial cross-section structure of the adjustment end of the middle support mechanism;

[0026] Among them: 1. Plate beam, 101. Simply supported plate beam 1#, 102. Simply supported plate beam 2#, 103. Simply supported plate beam 3#, 104. Simply supported plate beam 4#, 105. Simply supported plate beam 5#, 106. Simply supported plate beam 6#, 107. Simply supported plate beam 7#, 108. Simply supported plate beam 8#, 109. Simply supported plate beam 9#, 110. Simply supported plate beam 10#;

[0027] 2. Support mechanism, 201, support mechanism 1#, 202, support mechanism 2#, 203, support mechanism 3#, 204, support mechanism 4#, 205, support mechanism 5#;

[0028] 21. Fixed end, 211. Fixed end bolt, 212. Fixed end fixing plate, 213. Fixed end stiffening plate, 214. Fixed end screw hole; 22. Spiral steel pipe, 23. Fastening end, 231. Fastening end limit plate, 232. Fastening end stiffening plate, 233. Fastening end fixing plate, 24. Wedge fastener, 25. Adjustment end, 251. Adjustment end fixing plate, 252. Adjustment end limit plate, 253. Adjustment end stiffening plate, 254. Adjustment end bolt, 255. Adjustment end screw hole;

[0029] 3. abutment, 31. abutment cap, 32. abutment body, 33. cap, 34. foundation;

[0030] 4. Road surface, 5. Abutment slabs, 6. Backfill soil behind the abutment. DETAILED DESCRIPTION

[0031] The present invention is described clearly and completely below in conjunction with the accompanying drawings so that those skilled in the art can fully implement the present invention without having to make any creative work.

[0032] The specific implementation mode of the present invention is: Figure 1-7 As shown, a highway slab beam replacement construction method is shown, the abutment support mechanism 2 is symmetrically arranged from both sides of the abutment 3 to the center, the abutment support mechanism 2 is placed after the slab beam 1 is removed to a certain width on the outside, and then the slab beam 1 near the middle position is removed and the second batch of abutment support mechanisms 2 are placed. The construction process adopts a skip hole interval removal and replacement method, which specifically includes slab beam removal and slab beam installation;

[0033] The steps of removing the plate beam include:

[0034] (1) Divide the slab beam 1 to be removed into blocks from both sides to the middle and number them in sequence, such as Figure 2 As shown, simply supported plate beam 1#101, simply supported plate beam 2#102, simply supported plate beam 3#103, simply supported plate beam 4#104, simply supported plate beam 5#105, simply supported plate beam 6#106, simply supported plate beam 7#107, simply supported plate beam 8#108, simply supported plate beam 9#109, and simply supported plate beam 10#110 are numbered in a skip hole spacing manner;

[0035] (2) Remove each section of the slab beam 1 in the following order until it is completely removed and install the supporting mechanism 2 at the same time: remove the simply supported slab beam 1#101, install the supporting mechanism 1#201, remove the simply supported slab beam 2#102, install the supporting mechanism 2#202, remove the simply supported slab beam 3#103, install the supporting mechanism 3#203, remove the simply supported slab beam 4#104, install the supporting mechanism 4#204, remove the simply supported slab beam 5#105, remove the simply supported slab beam 6#106, remove the simply supported slab beam 7#107, remove the simply supported slab beam 8#108, install the supporting mechanism 5#205, remove the simply supported slab beam 9#109, and remove the simply supported slab beam 10#110, ensuring that the abutment 3 at the place where the slab beam 1 is removed is supported to avoid the abutment 3 from tilting forward or the abutment 3 from developing structural stress cracks under the lateral pressure of the backfill soil 6 behind the abutment;

[0036] The steps of installing the plate beam include: installing the plate beam 1 from the middle to both sides in sequence, first installing the plate beam 1 where the supporting mechanism 2 is not set, removing the nearby supporting mechanism 2 after the installation is completed, then installing other plate beams 1, removing the nearby supporting mechanism 2, and repeating this cycle until all the plate beams 1 are installed. The specific sequence is as follows: install simply supported plate beam 5#105, simply supported plate beam 9#109, and simply supported plate beam 10#110 in sequence, remove supporting mechanism 1#201, install simply supported plate beam 1#101, remove supporting mechanism 2#202, install simply supported plate beam 2#102, remove supporting mechanism 3#203, install simply supported plate beam 3#103, remove supporting mechanism 4#204, install simply supported plate beam 4#104, remove supporting mechanism 5#205, install simply supported plate beam 7#107 and simply supported plate beam 8#108, and the entire plate beam 1 is replaced.

[0037] A highway slab girder replacement abutment support device comprises a support mechanism 2 and a plurality of slab girders 1 arranged on an abutment 3, wherein the support mechanism 2 is arranged in a skip-hole spacing manner, and the abutment 3 comprises an abutment cap 31, an abutment body 32, a pedestal 33, and a foundation 34, wherein the support mechanism 2 is arranged on the abutment cap 31, and the slab girder 1 is cut into a plurality of simply supported slab girder blocks, wherein the support mechanism 2 is arranged in a skip-hole spacing manner below the simply supported slab girder blocks, and a road surface 4 is placed below, and an abutment slat 5 is arranged on the abutment 3. Under the action of the support mechanism 2, the abutment 3 is prevented from being affected by cracks caused by the backfill soil 6 on the side of the abutment, thereby reducing the service life of the abutment 3.

[0038] Furthermore, the supporting mechanism 2 includes a spiral steel pipe 22, a fixed end 21 arranged at one end of the spiral steel pipe 22, a fastening end 23 arranged at the other end of the spiral steel pipe 22, an adjusting end connected to the fastening end 25, and a wedge-shaped fastener 24 for limiting and fixing. The fixed end 21 includes a fixed end bolt 211, a fixed end fixing plate 212, a fixed end stiffening plate 213, and a fixed end screw hole 214. The fixed end fixing plate 212 is arranged at the end of the spiral steel pipe 22. The fixed end stiffening plate 213 is symmetrically arranged between the spiral steel pipe 22 and the fixed end fixing plate 212. A plurality of fixed end screw holes 214 are evenly arranged on the fixed end fixing plate 212. The fixed end bolt 211 passes through the fixed end screw hole 214 to anchor the fixed end 21 to the abutment cap 31 of the abutment 3. The fastening end 23 includes two fastening ends A limit plate 231 and a fastening end fixing plate 233, wherein the two fastening end limit plates 231 are arranged vertically at intervals on the end surface of the fastening end fixing plate 233, and the adjusting end 25 comprises an adjusting end fixing plate 251, an adjusting end limit plate 252, an adjusting end stiffening plate 253, an adjusting end bolt 254, and an adjusting end screw hole 255. The adjusting end limit plate 252 is connected to the fastening end fixing plate 233, and the adjusting end limit plate 252 and the adjusting end fixing plate 251 are perpendicular. The adjusting end stiffening plate 253 is arranged between the adjusting end limit plate 252 and the adjusting end fixing plate 251 and between the adjusting end limit plates 252. A plurality of adjusting end screw holes 255 are evenly arranged on the adjusting end fixing plate 251, and the adjusting end bolt 254 passes through the adjusting end screw hole 255 to anchor the adjusting end 25 to the abutment cap 31 of the abutment 3.

[0039] Furthermore, a plurality of fastening end stiffening plates 232 are provided between the fastening end limiting plate 231 and the fastening end fixing plate 233 .

[0040] Furthermore, the distance between the two fastening end limit plates 231 is the same as the outer diameter of the spiral steel pipe 22 , and the fastening end limit plates 231 are welded and fixed on the outer side wall of the spiral steel pipe 22 .

[0041] Furthermore, the spiral steel pipe 22 is a hollow structure.

[0042] Furthermore, the fastening end fixing plate 233 is provided with two slots, and the adjusting end limiting plate 252 is inserted into the slots to achieve connection.

[0043] Furthermore, the fixed end fixing plate 212, the fastening end fixing plate 233, and the adjusting end fixing plate 251 are rectangular.

[0044] Furthermore, the number of the fixing end screw hole 214 and the adjusting end screw hole 255 is four.

[0045] Furthermore, the adjusting end stiffening plate 253 includes a rectangular plate and a triangular plate, the rectangular plate is arranged between the adjusting end limit plates 252, and the triangular plate is arranged on the other side.

[0046] The preferred embodiments of the present invention are described above. It should be pointed out that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any simple modifications, equivalent changes and modifications made to the above embodiments by any technician familiar with the art based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention, shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A highway slab girder replacement construction method, which is implemented based on a bridge abutment support mechanism and is characterized in that: The abutment support mechanisms are symmetrically arranged from both sides of the abutment to the center. The abutment support mechanisms are placed after the slab beams are removed to a certain width on the outside. Then the slab beams near the middle are removed and the second batch of abutment support mechanisms are placed. The construction process adopts the method of removing and replacing the slabs at intervals by skipping holes, which specifically includes the removal and installation of slab beams. The abutment support mechanism includes a support mechanism and a plate beam arranged on the abutment, the support mechanism is arranged in a skip-hole interval manner, the abutment includes an abutment cap, an abutment body, a pedestal, and a foundation, the support mechanism is arranged on the abutment cap, the plate beam is cut into a plurality of simply supported plate beam blocks, and the support mechanism is arranged in a skip-hole interval below the simply supported plate beam block; the support mechanism includes a spiral steel pipe, a fixed end arranged at one end of the spiral steel pipe, a fastening end arranged at the other end of the spiral steel pipe, an adjusting end connected to the fastening end, and a wedge-shaped fastener for limiting and fixing, the fixed end includes a fixed end bolt, a fixed end fixing plate, a fixed end stiffening plate, and a fixed end screw hole, the fixed end fixing plate is arranged at the end of the spiral steel pipe, the fixed end stiffening plate is symmetrically arranged between the spiral steel pipe and the fixed end fixing plate, and the fixed end The fixing plate is evenly provided with a plurality of fixing end screw holes, and the fixing end bolts pass through the fixing end screw holes to anchor and fix the fixing end to the abutment cap. The fastening end includes two fastening end limit plates and a fastening end fixing plate. The two fastening end limit plates are vertically arranged at intervals on the end surface of the fastening end fixing plate. The adjusting end includes an adjusting end fixing plate, an adjusting end limit plate, an adjusting end stiffening plate, an adjusting end bolt, and an adjusting end screw hole. The adjusting end limit plate is connected to the fastening end fixing plate. The adjusting end limit plate and the adjusting end fixing plate are perpendicular. The adjusting end stiffening plate is arranged between the adjusting end limit plate and the adjusting end fixing plate and between the adjusting end limit plates. The adjusting end fixing plate is evenly provided with a plurality of adjusting end screw holes, and the adjusting end bolts pass through the adjusting end screw holes to anchor and fix the adjusting end to the abutment cap. The steps of removing the plate beam include: (1) The slab beams to be removed are numbered in sequence from both sides to the middle, such as simply supported slab beam 1#, simply supported slab beam 2#, etc., and the numbering method is skip hole spacing; (2) Remove each section of the slab beam in sequence until it is completely removed. Install the support structure while removing the slab beam to ensure that the abutment where the slab beam is removed is supported to avoid the abutment tilting forward or the abutment being subjected to the lateral pressure of the backfill soil behind the abutment and causing structural stress cracks; The steps of installing the plate beams include: installing the plate beams from the middle to both sides in sequence, first installing the plate beams where no supporting mechanism is set, removing the nearby supporting mechanism after the installation is completed, then installing other plate beams, removing the nearby supporting mechanism, and repeating this cycle until all the plate beams are installed.

2. A highway slab girder replacement construction method according to claim 1, characterized in that: A plurality of fastening end stiffening plates are arranged between the fastening end limiting plate and the fastening end fixing plate.

3. A highway slab girder replacement construction method according to claim 2, characterized in that: The distance between the two fastening end limit plates is the same as the outer diameter of the spiral steel pipe, and the fastening end limit plates are welded and fixed on the outer side wall of the spiral steel pipe.

4. A highway slab girder replacement construction method according to claim 3, characterized in that: The spiral steel pipe is a hollow structure.

5. A highway slab girder replacement construction method according to claim 4, characterized in that: The fastening end fixing plate is provided with two slots, and the regulating end limiting plate is inserted into the slots to achieve connection.

6. A highway slab girder replacement construction method according to claim 5, characterized in that: The fixed end fixing plate, the fastening end fixing plate and the adjusting end fixing plate are rectangular.

7. A highway slab girder replacement construction method according to claim 6, characterized in that: The number of the fixing end screw holes and the adjusting end screw holes is 4.

8. A highway slab girder replacement construction method according to claim 7, characterized in that: The adjusting end stiffening plate comprises a rectangular plate and a triangular plate. The rectangular plate is arranged between the adjusting end limit plates, and the triangular plate is arranged on the other sides.

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