Modularized dismantling and building method for section steel-concrete composite bridge deck slab

Abstract

The invention discloses a modular demolition and construction method of a profile steel-concrete composite bridge deck, and the demolition method of the profile steel-concrete composite bridge deck comprises the following steps: S1, cutting a reinforced concrete bridge deck and a steel plate along a transverse bridge direction by using a rope saw, and avoiding cutting a profile steel distribution beam; and S2, connecting bolts between the profile steel distribution beams and the bailey beams are dismantled, so that a plurality of profile steel-concrete composite bridge deck slab modules are formed. The reinforced concrete bridge deck slab can be well protected by cutting the reinforced concrete bridge deck slab through a rope saw, the profile steel distribution beam can be prevented from being scrapped due to damage by avoiding cutting of the profile steel distribution beam, and the connecting bolts between the profile steel distribution beam and the bailey beam are dismantled. The structural steel-concrete composite bridge deck slab can be disassembled into a plurality of recyclable structural steel-concrete composite bridge deck slab modules by means of the structural steel-concrete composite bridge deck slab, so that environmental pollution is avoided, the steel plates and the structural steel distribution beams of the whole temporary steel bridge can be reutilized, and the turnover utilization rate of the reinforced concrete bridge deck slab, the steel plates and the structural steel distribution beams is increased.

Description

Technical Field

[0001] This invention relates to the field of steel temporary bridge construction, and particularly to a modular dismantling and construction method for steel-concrete composite bridge decks. Background Technology

[0002] Current urban temporary steel bridges mostly adopt a combined structure of "steel pipe piles + steel cap beams + Bailey bridges + steel distribution beams + steel plates + reinforced concrete bridge deck". When dismantling the bridge deck and steel distribution beams, it is common practice to first break the bridge deck concrete with a pickaxe, and then separate the steel plates and steel distribution beams with oxy-acetylene cutting. This not only generates a lot of dust and noise, but also results in low turnover rate of steel plates and steel sections due to cutting and scrapping, poor construction efficiency, and failure to meet the requirements of green and low-carbon construction, emergency reopening, and resource recycling. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing technology, such as large damage and low turnover rate when dismantling temporary steel bridges, and to provide a modular dismantling and construction method for steel-concrete composite bridge decks.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A method for dismantling a steel-concrete composite bridge deck, wherein the steel-concrete composite bridge deck is installed on a temporary steel bridge, and the steel-concrete composite bridge deck includes a reinforced concrete bridge deck, a steel plate, and a plurality of steel distribution beams connected sequentially from top to bottom. The steel distribution beams extend transversely along the temporary steel bridge, and the plurality of steel distribution beams are spaced apart longitudinally along the temporary steel bridge. The steel distribution beams are bolted to the Bailey bridge beams of the temporary steel bridge. The method for dismantling the temporary steel bridge includes:

[0006] S1. Use a wire saw to cut the reinforced concrete bridge deck and the steel plate along the transverse direction of the bridge, while avoiding cutting the steel distribution beam;

[0007] S2. Remove the connecting bolts between the steel distribution beam and the Bailey beam to form several steel-concrete composite bridge deck modules.

[0008] In this technical solution, cutting the steel temporary bridge with a wire saw can effectively protect the concrete bridge deck. Simultaneously, avoiding cutting the steel distribution beam prevents its damage and potential scrapping. After cutting the concrete bridge deck and steel plates, removing the connecting bolts between the steel distribution beam and the Bailey bridge allows the steel-concrete composite bridge deck to be disassembled into several recyclable steel-concrete composite bridge deck modules. This avoids the environmental pollution caused by the destructive demolition of the concrete bridge deck and enables the entire steel-concrete composite bridge deck to be reused by disassembling it into modules, improving the turnover rate of the steel-concrete composite bridge deck. Furthermore, during reuse, the individual steel-concrete composite bridge deck modules can be connected as needed, making construction more convenient and faster.

[0009] Preferably, in step S1, along the longitudinal direction of the bridge, the steel distribution beam is positioned to avoid the connection points of any two Bailey beams, and a wire saw is used to cut the reinforced concrete bridge deck and the steel plate at the connection points of the two Bailey beams.

[0010] In this technical solution, by setting the steel distribution beam to avoid the connection position of the Bailey beam, and cutting is performed at the connection position of the two Bailey beams, the resulting steel-concrete composite bridge deck module has a more square shape, which facilitates subsequent hoisting and transportation.

[0011] Preferably, a guide strip is pre-embedded at the cutting position of the steel-concrete composite bridge deck, and the guide strip extends along the transverse direction of the bridge. In step S1, the reinforced concrete bridge deck is cut along the guide strip.

[0012] In this technical solution, guide strips are pre-embedded at the cutting positions of the reinforced concrete bridge deck. During cutting, the reinforced concrete bridge deck and steel plate are cut along the guide strips. The guide strips can provide a precise cutting path for the wire saw, ensuring that the cut surface is vertical and flat, and greatly improving the tightness of the assembly of adjacent panels.

[0013] A steel-concrete composite bridge deck module is manufactured by the steel-concrete composite bridge deck dismantling method described above.

[0014] Preferably, each end of the steel-concrete composite bridge deck module is provided with a pre-embedded connector, which is used to connect with other steel-concrete composite bridge deck modules.

[0015] In this technical solution, the pre-embedded parts can improve the assembly accuracy and efficiency. At the same time, the pre-embedded connectors can effectively transfer the shear force and bending moment between adjacent steel-concrete composite bridge deck modules, ensuring the overall working performance of the steel-concrete composite bridge deck after splicing.

[0016] Preferably, the steel plate and the steel distribution beam are connected by a detachable connection structure.

[0017] In this technical solution, by using detachable connectors to connect the steel plates and the steel distribution beams, the installation efficiency of the steel-concrete composite bridge deck module assembly site and the efficiency of future dismantling can be significantly improved.

[0018] Preferably, a reinforcing member is provided at the bottom of the steel plate, the reinforcing member being used to improve the structural strength of the steel-concrete composite bridge deck module, the reinforcing member being connected to the steel plate, and / or the reinforcing member being connected to the connecting member.

[0019] In this technical solution, by setting up reinforcing components, it is possible to compensate for the deformation or localized strength deficiency that may occur in the steel plate during cutting, hoisting, transportation and reuse, thereby improving the reliability of the steel-concrete composite bridge deck formed by assembling steel-concrete composite bridge deck modules.

[0020] Preferably, the connector includes at least one set of flange plates and high-strength bolts for connecting reinforced steel distribution beams, or reinforcing ribs and high-strength bolts for connecting reinforced steel plates.

[0021] Preferably, the cut position of the reinforced concrete bridge deck corresponding to the steel-concrete composite bridge deck avoids the main reinforcement bars in the concrete bridge deck.

[0022] In this technical solution, by locally adjusting the arrangement of reinforcing bars, such as using short reinforcing bars for the main reinforcing bars at the cutting position, the probability of the wire saw hitting the main reinforcing bars during cutting can be reduced, protecting the cutting equipment and improving efficiency, while also facilitating subsequent connections.

[0023] A method for constructing a steel-concrete composite bridge deck, wherein the method uses multiple steel-concrete composite bridge deck modules as described above to construct the steel-concrete composite bridge deck, and the method includes:

[0024] A1: Assemble and connect multiple steel-concrete composite bridge deck modules to form the steel-concrete composite bridge deck;

[0025] A2: Inspect the quality of the reinforced concrete bridge deck, and based on the inspection results, locally reinforce the reinforced concrete bridge deck. Local reinforcement methods include:

[0026] A21: When cracks exist in the reinforced concrete bridge deck, they shall be treated using low-viscosity epoxy resin injection or surface sealing technology.

[0027] A22: When the reinforced concrete bridge deck is damaged, it shall be repaired using polymer mortar or concrete;

[0028] A3: The top or bottom surface of the reinforced concrete bridge deck is bonded with high-performance fiber composite material for overall reinforcement.

[0029] In this technical solution, by inspecting and reinforcing the spliced ​​steel-concrete composite bridge deck, the reliability and safety of the steel-concrete composite bridge deck can be improved.

[0030] The positive and progressive effects of this invention are as follows: cutting the steel-concrete composite bridge deck with a wire saw can better protect the concrete bridge deck. At the same time, avoiding cutting the steel distribution beam can prevent the steel distribution beam from being damaged and scrapped. By removing the connecting bolts between the steel distribution beam and the Bailey beam, the steel-concrete composite bridge deck can be disassembled into several recyclable steel-concrete composite bridge deck modules. This avoids the environmental pollution caused by the destructive demolition of the concrete bridge deck and allows the entire steel-concrete composite bridge deck to be reused by disassembling it into steel-concrete composite bridge deck modules, thereby improving the turnover rate of the steel-concrete composite bridge deck. In addition, during reuse, the individual steel-concrete composite bridge deck modules can be connected as needed, making construction more convenient and faster. Attached Figure Description

[0031] Figure 1 This is a partial cross-sectional structural diagram of the steel-concrete composite bridge deck and Bailey beam in the longitudinal direction of Embodiment 1 of the present invention.

[0032] Figure 2 This is a partial cross-sectional structural diagram of the steel-concrete composite bridge deck and Bailey bridge in the transverse direction of Embodiment 1 of the present invention.

[0033] Reinforced concrete bridge deck 1

[0034] Steel plate 2

[0035] 3 steel distribution beams

[0036] Bailey Beam 4

[0037] Shear nail 5

[0038] Bolt 6 Detailed Implementation

[0039] The present invention will be further illustrated below by way of examples, but the invention is not limited to Example 1.

[0040] This embodiment provides a method for dismantling steel-concrete composite bridge decks, such as... Figure 1 and Figure 2As shown, the steel-concrete composite bridge deck includes a reinforced concrete bridge deck 1, a steel plate 2, and multiple steel distribution beams 3 connected sequentially from top to bottom. The steel distribution beams 3 extend along the transverse direction of the temporary steel bridge, and the multiple steel distribution beams 3 are spaced apart along the longitudinal direction of the temporary steel bridge. The steel plate 2 is anchored to the reinforced concrete bridge deck 1 by shear studs 5. The steel distribution beams 3 are connected to the Bailey beams 4 by high-strength bolts 6, and the Bailey beams 4 are connected by support frames.

[0041] Specifically, the demolition steps are as follows:

[0042] S1. Use a wire saw to cut the reinforced concrete bridge deck 1 and steel plate 2 along the transverse direction of the bridge, and avoid cutting the steel distribution beam 3;

[0043] S2. Remove the connecting bolts 6 between the steel distribution beam 3 and the Bailey beam 4 to form several steel-concrete composite bridge deck modules.

[0044] Cutting the steel-concrete composite bridge deck with a wire saw effectively protects the concrete bridge deck. Avoiding cutting the steel distribution beam 3 prevents it from being damaged and rendered unusable. After cutting the concrete bridge deck and steel plate 2, removing the connecting bolts 6 between the steel distribution beam 3 and the Bailey beam 4 allows the steel-concrete composite bridge deck to be disassembled into several recyclable steel-concrete composite bridge deck modules. This avoids the environmental pollution caused by the destructive removal of the concrete bridge deck and allows the entire steel-concrete composite bridge deck to be reused by disassembling it into modules, improving its turnover rate. Furthermore, during reuse, the individual steel-concrete composite bridge deck modules can be connected as needed, making construction more convenient and faster.

[0045] In step S1, if the steel distribution beam 3 is positioned to avoid the connection points of any two Bailey beams 4 along the bridge direction, a wire saw is used to cut the reinforced concrete bridge deck 1 and steel plate 2 at the connection points of the two Bailey beams 4 during cutting. Since there is no connection between the steel distribution beam 3 and the Bailey beams 4 across the steel temporary bridge module, it is not necessary to loosen the bolts 6 between the steel distribution beam 3 and the Bailey beams 4. By positioning the steel distribution beam 3 to avoid the connection points of the Bailey beams 4, and cutting corresponding to the connection points of the two Bailey beams 4, the resulting steel-concrete composite bridge deck module has a more square shape, facilitating subsequent hoisting and transportation.

[0046] If a steel distribution beam 3 is installed directly above the connection position between Bailey beams 4, the cutting position should avoid the connection position of Bailey beams 4 to avoid cutting the steel distribution beam 3. In this case, there is a connection between the steel distribution beam 3 and Bailey beam 4 through a temporary steel bridge module. In this case, the bolt 6 between the steel distribution beam 3 and Bailey beam 4 closest to the cutting position needs to be loosened. This will make the size of the steel-concrete composite bridge panel module under this cutting method smaller, which will facilitate subsequent hoisting and transportation.

[0047] To facilitate cutting and make the resulting steel-concrete composite bridge deck modules neater, all steel distribution beams 3 can be set to avoid the connection positions of Bailey beams 4 during the construction of the steel-concrete composite bridge deck.

[0048] In this embodiment, each Bailey beam 4 is 3m long. The cutting position can be selected according to actual needs. If there are no other special requirements, it is advisable to cut according to the length of each steel-concrete composite bridge deck module of 3m. Preferably, the cutting is carried out at the connection position of every two Bailey beams 4.

[0049] In this embodiment, guide strips (which can be steel plates 2 or PVC strips) are pre-embedded at the cutting positions of the steel-concrete composite bridge deck. The guide strips extend along the transverse direction of the bridge. In step S1, the steel-concrete composite bridge deck is cut along the guide strips. By pre-embedding guide strips at the cutting positions of the steel-concrete composite bridge deck, the steel-concrete composite bridge deck is cut along the guide strips during cutting. The guide strips can provide a precise cutting path for the wire saw, ensuring that the cut surface is vertical and flat, and greatly improving the tightness of the assembly of adjacent panels.

[0050] Meanwhile, to ensure the seamless assembly and fitting of adjacent steel-concrete composite bridge deck modules, each steel-concrete composite bridge deck module must be marked during hoisting and dismantling. The modules should be numbered according to the format KA-B# (A represents the Ath span, B represents the nth module). A unique identification code (such as a QR code / RFID tag) should be affixed to each module to record its production information, usage history (number of uses, load), test results, maintenance records, etc., thus achieving full lifecycle management and scientifically assessing the remaining performance and usability of the components.

[0051] Example 2

[0052] This embodiment provides a steel-concrete composite bridge deck module, which is manufactured using the steel-concrete composite bridge deck dismantling method described in Embodiment 1.

[0053] The steel-concrete composite bridge deck module has pre-embedded connectors at both ends along the longitudinal direction of the bridge. These connectors are used to connect with other steel-concrete composite bridge deck modules. The pre-embedded connectors improve assembly accuracy and efficiency. Furthermore, they effectively transfer shear force and bending moment between adjacent steel-concrete composite bridge deck modules, ensuring the overall performance of the assembled steel-concrete composite bridge deck.

[0054] Specifically, the connectors include at least one of the following: flange plates + high-strength bolts for connecting reinforced steel distribution beams, or reinforcing ribs + high-strength bolts for connecting reinforced steel plates. For example, flange plates with precision bolt holes can be welded to the beam ends of two adjacent steel distribution beams. During assembly, the flanges are aligned, and high-strength bolts are inserted and tightened. This ensures precise alignment and reliable force transmission of the steel-concrete composite bridge deck modules during subsequent assembly, while also providing high installation and disassembly efficiency.

[0055] Simultaneously, reinforcing ribs are welded to the bottom of two adjacent steel plates 2, and the reinforcing ribs under the adjacent steel plates are connected by high-strength bolts. By setting reinforcing ribs, deformation or localized strength deficiency that may occur in the steel plates 2 during cutting, hoisting, transportation, and reuse can be compensated for, thereby improving the reliability of the steel-concrete composite bridge deck formed by assembling the steel-concrete composite bridge deck modules.

[0056] Specifically, in this embodiment, the reinforcing member can be welded to the bottom reinforcing rib of the steel plate 2, and the reinforcing ribs at both ends of the adjacent steel-concrete composite bridge deck modules can be connected by high-strength bolts.

[0057] In this embodiment, the steel plate 2 and the steel distribution beam 3 are connected by a detachable connection structure. By using detachable connectors to connect the steel plate 2 and the steel distribution beam 3, the installation efficiency on-site for assembling the steel-concrete composite bridge deck module and the efficiency for future dismantling can be significantly improved.

[0058] In this embodiment, the arrangement of reinforcing bars can be adjusted locally. For example, using short reinforcing bars at the cutting position can reduce the probability of the wire saw hitting the main reinforcing bars, protect the cutting equipment and improve efficiency, and also facilitate subsequent connections.

[0059] Example 3

[0060] This embodiment provides a modular construction method for steel-concrete composite bridge decks. This method uses multiple steel-concrete composite bridge deck modules from Embodiment 2 to construct temporary steel bridges. The modular construction method for steel-concrete composite bridge decks includes:

[0061] A1: Assemble and connect multiple steel-concrete composite bridge deck modules to form a steel-concrete composite bridge deck;

[0062] A2: Inspect the quality of reinforced concrete bridge deck 1, and based on the inspection results, locally reinforce reinforced concrete bridge deck 1 shall be carried out. The methods of local reinforcement include:

[0063] A21: When cracks exist in the reinforced concrete bridge deck 1, use low-viscosity epoxy resin injection or surface sealing technology for treatment;

[0064] A22: When there is damage to the reinforced concrete bridge deck, polymer mortar or concrete should be used for repair;

[0065] A3: Reinforce the top or bottom surface of the reinforced concrete bridge deck 1 by bonding high-performance fiber composite materials.

[0066] By inspecting and reinforcing the spliced ​​steel-concrete composite bridge deck, the reliability and safety of the steel-concrete composite bridge deck can be improved.

[0067] Specifically in A1, the corresponding number of steel-concrete composite bridge deck modules should be assembled according to the bridge span, and the steel-concrete composite bridge deck modules should be connected by pre-embedded connectors to ensure tight joints.

[0068] To improve the connection strength, flange plates can be welded to the ends of the steel distribution beam 3, and a rigid connection can be formed after the bolts 6 are tightened.

[0069] Furthermore, the reinforcing bars can be chiseled open at the joints of the concrete bridge deck, U-shaped reinforcing bars can be welded, and shrinkage-compensating concrete can be poured.

[0070] In A2, ultrasonic testing can be used to detect cracks and damage in the bridge deck. If gaps exist between modules, corresponding local reinforcement methods can be used for treatment.

[0071] In A3, the bending resistance can be improved by bonding high-performance fiber composite materials such as carbon fiber reinforced plastic (FRP) to achieve overall reinforcement. At the same time, an anti-corrosion coating can be sprayed on the surface of the assembled bridge deck to extend its service life.

[0072] Of course, in other embodiments, other types of lightweight fiber composite materials with high strength and corrosion resistance that can reinforce reinforced concrete bridge decks can also be used, such as materials composed of carbon fiber, aramid and other super-strong fibers and resin, which will not be elaborated here.

[0073] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for dismantling a steel-concrete composite bridge deck, wherein the steel-concrete composite bridge deck is installed on a temporary steel bridge, the steel-concrete composite bridge deck comprising, from top to bottom, a reinforced concrete bridge deck, a steel plate, and a plurality of steel distribution beams connected sequentially, the steel distribution beams extending transversely along the temporary steel bridge, the plurality of steel distribution beams being spaced apart longitudinally along the temporary steel bridge, and the steel distribution beams being bolted to the Bailey bridge beams of the temporary steel bridge, characterized in that... The method for dismantling the steel temporary bridge includes: S1. Use a wire saw to cut the reinforced concrete bridge deck and the steel plate along the transverse direction of the bridge, while avoiding cutting the steel distribution beam; S2. Remove the connecting bolts between the steel distribution beam and the Bailey beam to form several steel-concrete composite bridge deck modules.

2. The method for dismantling the steel-concrete composite bridge deck as described in claim 1, characterized in that, In step S1, along the longitudinal direction of the bridge, the cutting position of the reinforced concrete bridge deck is set to avoid the connection position of any two Bailey beams, and the reinforced concrete bridge deck and the steel plate are cut at the connection position of the two Bailey beams using a wire saw.

3. The method for dismantling the steel-concrete composite bridge deck as described in claim 1, characterized in that, The reinforced concrete bridge deck is pre-embedded at the cutting position. The guide strip extends along the transverse direction of the bridge. In step S1, the reinforced concrete bridge deck is cut along the guide strip.

4. A steel-concrete composite bridge deck module, characterized in that, The steel-concrete composite bridge deck module is manufactured using the steel-concrete composite bridge deck dismantling method as described in any one of claims 1-3.

5. The steel-concrete composite bridge deck module as described in claim 4, characterized in that, The steel-concrete composite bridge deck module has pre-embedded connectors at both ends along the longitudinal direction of the bridge. The connectors are used to connect with other steel-concrete composite bridge deck modules.

6. The steel-concrete composite bridge deck module as described in claim 4, characterized in that, The steel plate and the steel distribution beam are connected by a detachable connection structure.

7. The steel-concrete composite bridge deck module as described in claim 5, characterized in that, A reinforcing member is provided at the bottom of the steel plate. The reinforcing member is used to improve the reliability and integrity of the connection of the steel-concrete composite bridge deck module. The reinforcing member is connected to the steel plate and / or the reinforcing member is connected to the connecting member.

8. The steel-concrete composite bridge deck module as described in claim 7, characterized in that, The connector includes at least one set of flange plates and high-strength bolts for connecting reinforced steel distribution beams, or reinforcing ribs and high-strength bolts for connecting reinforced steel plates.

9. The steel-concrete composite bridge deck module as described in claim 5, characterized in that, The cut position of the reinforced concrete bridge deck corresponding to the steel-concrete composite bridge deck avoids the main reinforcement in the concrete bridge deck.

10. A modular construction method for steel-concrete composite bridge decks, characterized in that, The construction method of the modular steel temporary bridge with steel-concrete composite bridge deck uses multiple steel-concrete composite bridge deck modules as described in any one of claims 5-9 to construct the steel-concrete composite bridge deck. The construction method of the steel-concrete composite bridge deck includes: A1: Assemble and connect multiple steel-concrete composite bridge deck modules to form the steel-concrete composite bridge deck; A2: Inspect the quality of the reinforced concrete bridge deck, and based on the inspection results, locally reinforce the reinforced concrete bridge deck. Local reinforcement methods include: A21: When cracks exist in the reinforced concrete bridge deck, they shall be treated using low-viscosity epoxy resin injection or surface sealing technology. A22: When the reinforced concrete bridge deck is damaged, it shall be repaired using polymer mortar or concrete; A3: The top or bottom surface of the reinforced concrete bridge deck is bonded with high-performance fiber composite material for overall reinforcement.

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