A bridge approach slab prevention structure suitable for wide bridges

Abstract

This invention discloses an anti-bridge approach slab structure suitable for wide bridges, comprising two parallel bridge approach sections, a bridge deck on one side of each bridge approach, and piers supporting each bridge deck. A concrete split wall is provided on the side of the gap between the two bridge approach sections away from the bridge deck. Split wall connecting components are provided on both sides of the concrete split wall. The split wall connecting components are connected to one side of a repositioning and reinforcement structure within the flexible soil, and the other side of the repositioning and reinforcement structure is connected to a force transmission plate. This invention addresses the use of concrete split walls at the bridge approach of wide bridges, separating the flexible soil and simultaneously providing support for two sets of repositioning and reinforcement structures, reducing the weight load that a single repositioning and reinforcement structure needs to bear from the soil. This invention allows for adjustment of the repositioning and reinforcement structure via hydraulic dampers and hinged jacks, enabling the repositioning and reinforcement structure to be lifted by loading after a bridge approach slab slab occurs.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering technology, specifically relating to an anti-bridge approach slab structure suitable for wide bridges. Background Technology

[0002] Bridge approach slab settlement is common at the junction of flexible pavement and rigid structure at bridge approaches. As the bridge ages, the flexible pavement will settle. This is especially true for wide bridges, where the large volume of soil in the flexible foundation at the bridge approach means that significant settlement requires drainage consolidation and soil replacement, resulting in substantial construction work and severe disruption to municipal traffic.

[0003] Long-range bridges are greatly affected by vehicle traffic and soil geology during long-term use. In particular, the large volume of soil excavated by long-range bridges can easily lead to uneven soil settlement after long-term use. Therefore, it is necessary to propose new structures that can meet the needs of soil settlement adjustment for long-range bridges. Summary of the Invention

[0004] This invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a bridge approach slab structure suitable for wide bridges.

[0005] The technical solution of the present invention is: a bridge approach anti-slab structure suitable for wide bridges, comprising two bridge approaches with parallel gaps, a bridge deck on one side of each bridge approach, and piers supporting each bridge deck. A concrete split wall is provided on the side of the gap between the two bridge approaches away from the bridge deck. Split wall connecting components are provided on both sides of the concrete split wall. The split wall connecting components are connected to one side of a resetting and reinforcing structure in the flexible soil, and the other side of the resetting and reinforcing structure is connected to a force transmission plate.

[0006] Furthermore, the repositioning and reinforcement structure is not in contact with the bridge abutment sidewall, and the repositioning and reinforcement structure is a multi-level structure.

[0007] Furthermore, the repositioning and reinforcement structure on the outer side of each bridge abutment includes two connecting plates. One connecting plate is connected to the split wall connecting assembly at the concrete split wall, and the other connecting plate is connected to the force transmission plate.

[0008] Furthermore, the concrete split wall is an internally airy structure. The two side walls of the concrete split wall separate the flexible soil outside the two bridge abutments, while the split wall connecting components in the concrete split wall provide support for the repositioning and reinforcement structure.

[0009] Furthermore, the concrete split wall is equipped with transverse supporting steel beams inside, which abut against the two inner sidewalls of the concrete split wall.

[0010] Furthermore, the split wall connection assembly includes a curved groove in the concrete split wall and a connecting steel plate on the inner side of the wall. One side of the connecting plate is connected to the connecting steel plate through a connector passing through the curved groove.

[0011] Furthermore, multiple support plates are installed between the two connecting plates, each of which has a horizontally convex arc shape.

[0012] Furthermore, each support plate is equipped with multiple extended bearing plates that expand the reinforcement range of the flexible soil, and the extended bearing plates are arranged in a radiating shape away from the bridgehead.

[0013] Furthermore, each extended bearing plate is provided with a divergent steel mesh to ensure that all extended bearing plates on each level are subjected to uniform load. The divergent steel mesh is in the shape of a divergent arc.

[0014] Furthermore, an adjustment structure is provided between the column piers to drive the force transmission plate to rotate, thereby raising and resetting the reinforcement structure.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention addresses the installation of concrete split walls at the bridgehead of wide bridges. These concrete split walls separate the flexible soil mass and simultaneously provide support for two sets of repositioning and reinforcement structures, reducing the weight load that a single-sided repositioning and reinforcement structure needs to bear on the soil mass.

[0017] This invention uses a hydraulic damper and a hinged jack to adjust the repositioning and reinforcement structure, and can lift and reset the reinforcement structure by loading after a bridge approach slab settlement occurs.

[0018] This invention can shorten the construction period for solving the problem of bridge approach slab settlement on wide bridges and improve the convenience of urban road traffic. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is another structural schematic diagram of the present invention;

[0021] Figure 3 This is a side view of the present invention;

[0022] Figure 4 This is a bottom view of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection between the connecting plate and the concrete split wall in this invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the concrete split wall in this invention;

[0025] Figure 7 This is a schematic diagram of the connecting plate in this invention;

[0026] Figure 8 This is a schematic diagram of the connection between the extended support plate and the connecting plate in this invention;

[0027] Figure 9 This is a structural schematic diagram of the force transmission plate and rectangular concrete enclosure structure in this invention;

[0028] Figure 10 This is a schematic diagram showing the positions of the rectangular concrete enclosure structure and the telescopic pole in this invention;

[0029] Figure 11 This is a schematic diagram showing the location of the top surface of the bridge abutment soil and the reinforcement area in this invention;

[0030] Figure 12 This is a side view of the location of the top surface of the bridge abutment soil and the reinforcement area in this invention;

[0031] Figure 13 This is a schematic diagram showing the positional changes between the top surface of the bridge abutment soil and the reinforced area in this invention;

[0032] in:

[0033] 1. Bridge deck 2. Bridgehead

[0034] 3 column piers, 4 concrete split walls

[0035] 5. Force transmission plate; 6. Extended force-bearing plate

[0036] 7 Support plate 8 Connecting plate

[0037] 9. Diverging steel mesh; 10. Replaceable cross-shaped steel.

[0038] 11 Supporting steel beams 12 Jacks

[0039] 13 Curved groove 14 Main load-bearing cross steel

[0040] 15 Connecting steel plates

[0041] 20 Rectangular concrete enclosure structure

[0042] 21 Telescopic pole

[0043] 30. Top surface of the soil at the bridgehead

[0044] 31 Fixed plate 32 Hydraulic damper

[0045] 33 Circular collar

[0046] 40. Scope of soil reinforcement

[0047] 50. Split wall enclosure surface; 51. Folded connecting plate. Detailed Implementation

[0048] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0049] like Figures 1 to 13 As shown, an anti-bridge approach slab structure suitable for wide bridges includes two bridge approach 2 with parallel gaps, a bridge deck 1 set on one side of each bridge approach 2, and column piers 3 supporting each bridge deck 1. A concrete split wall 4 is set on the side of the gap between the two bridge approach 2 away from the bridge deck 1. Split wall connecting components are set on both sides of the concrete split wall 4. The split wall connecting components are connected to one side of the resetting and reinforcing structure in the flexible soil, and the other side of the resetting and reinforcing structure is connected to the force transmission plate 5.

[0050] The repositioning and reinforcement structure is not in contact with the side wall of the bridge abutment 2, and the repositioning and reinforcement structure is a multi-level structure.

[0051] Each bridgehead 2 outer side repositioning and reinforcement structure includes two connecting plates 8. One connecting plate 8 is connected to the split wall connecting component at the concrete split wall 4, and the other connecting plate 8 is connected to the force transmission plate 5.

[0052] The concrete split wall 4 is an internally open structure. The two side walls of the concrete split wall 4 separate the flexible soil outside the two bridge abutments 2. At the same time, the split wall connecting components in the concrete split wall 4 provide support for the repositioning and reinforcement structure.

[0053] The concrete split wall 4 is provided with a transverse support steel beam 11 inside, and the support steel beam 11 is fixedly connected to the two inner side walls of the concrete split wall 4 by pre-embedded connectors.

[0054] The split wall connection assembly includes a curved groove 13 in the concrete split wall 4 and a connecting steel plate 15 on the inner side of the wall. One side of the connecting plate 8 is connected to the connecting steel plate 15 through a connector passing through the curved groove 13.

[0055] A multi-level support plate 7 is provided between the two connecting plates 8, and each support plate 7 has a horizontally convex arc surface.

[0056] Each support plate 7 is equipped with multiple extended bearing plates 6 to expand the range of flexible soil reinforcement. The extended bearing plates 6 are radiating away from the bridgehead 2.

[0057] Each layer of extended bearing plate 6 is provided with a divergent steel mesh 9 to ensure that all extended bearing plates 6 on each level are subjected to uniform load. The divergent steel mesh 9 is in the shape of a divergent arc.

[0058] An adjustment structure is provided between the column piers 3. The adjustment structure drives the force transmission plate 5 to rotate, and the force transmission plate 5 adjusts and resets the reinforcement structure.

[0059] Specifically, such as Figures 1 to 4 As shown, the device of this application is suitable for wide bridges and requires two bridgeheads 2 and two bridge decks 1, with a gap between the two bridgeheads 2.

[0060] A concrete partition wall 4 is provided on the side of the gap between the two bridgeheads 2 away from the bridge deck 1. The function of the concrete partition wall 4 is to separate the flexible soil. The concrete partition wall 4 provides lateral support for the flexible soil, reducing the weight load of the soil that the unilateral resetting and reinforcement structure needs to bear.

[0061] Each bridgehead 2 is provided with a resetting and reinforcement structure on one side, and a connecting plate 8 in the resetting and reinforcement structure is connected to the inner connecting steel plate 15 of the side wall of the concrete split wall 4.

[0062] Specifically, the lower end of the bridge deck 1 is supported by multiple piers 3. For example... Figure 4 As shown, the adjustment structures of the two bridge decks 1 are symmetrical along the gap of the bridgehead 2. Taking one of the adjustment structures as an example, the adjustment structure is set between the two sets of piers 3 near the bridgehead 2.

[0063] More specifically, a circular collar 33 is installed on the pier 3 closest to the bridgehead 2, and the circular collar 33 is movably connected to the force transmission plate 5. The movable joint between the circular collar 33 and the force transmission plate 5 provides a fulcrum for the rotation of the force transmission plate 5.

[0064] More specifically, the movable connecting component between the circular collar 33 and the force transmission plate 5 is a high-strength bearing and a pin, thus providing a rotating basis for the shaft to rotate.

[0065] More specifically, a fixing plate 31 is installed on the second row of column piers 3 away from the bridgehead 2, and a hydraulic damper 32 is installed between the fixing plate 31 and the tail end of the force transmission plate 5.

[0066] More specifically, the hydraulic damper 32 is arranged at an angle, and the two ends of the hydraulic damper 32 are connected by a steel hinge seat.

[0067] More specifically, such as Figure 3 As shown, the vertical height of the fixing plate 31 is higher than that of the circular collar 33. The fixing plate 31 is located on the outer side of the second row of piers 3 furthest from the bridgehead 2, and the circular collar 33 is located on the outer side of the pier 3 closest to the bridgehead 2. Figure 4 As shown, the fixing plate 31 is an irregularly shaped connector.

[0068] In one embodiment, the fixing plate 31 includes two arc-shaped portions connected to the outer wall of the column pier 3, and a straight portion is provided between the arc-shaped portions. The hydraulic damper 32 is provided on the side wall of the straight portion.

[0069] In another embodiment, the fixing plate 31 includes two semicircular parts, which are respectively connected to the outer walls of the two column bases 3. Two straight parts are provided between the two semicircular parts. The closed space formed by the two semicircular parts and the two straight parts surrounds the two column bases 3. The hydraulic damper 32 is provided on the side wall of a straight part.

[0070] Preferably, the straight portion is tangent to the arc / semi-circular portion.

[0071] Specifically, the end of the force transmission plate 5 is provided with a folded connecting plate 51, which is connected to the connecting plate 8 to adapt to the outward radiating arrangement of the connecting plate 8. At the same time, the force transmission plate 5 has an L-shaped structure, and stiffening ribs are provided to reinforce the corner transition area. This corner position is located between the two sets of column piers 3.

[0072] The force transmission plate 5 and the folded connecting plate 51 are made of high-strength steel and are an integral structure.

[0073] Specifically, such as Figure 5 As shown, the connecting plate 8 completely blocks the curved groove 13 in the concrete split wall 4. When the connecting plate 8 is adjusted with the resetting reinforcement structure, the connecting plate 8 still blocks the curved groove 13 to prevent soil from entering the interior of the concrete split wall 4 through the curved groove 13.

[0074] Specifically, such as Figure 6 As shown, the supporting steel beams 11 in the concrete split wall 4 provide internal support for the two larger sides to prevent the concrete split wall 4 from being crushed and collapsed.

[0075] Specifically, the supporting steel beam 11 can provide force support for the jack 12.

[0076] Specifically, the connecting steel plate 15 is installed inside the concrete split wall 4, and the groove direction of the curved groove 13 is adapted to the adjustment and movement of the resetting and reinforcing structure. During the adjustment of the resetting and reinforcing structure, the connecting steel plate 15 will move along with the adjustment of the resetting and reinforcing structure and the connecting plate 8.

[0077] Specifically, the inner side of the connecting steel plate 15 is connected to the main load-bearing cross steel 14, the other side of the main load-bearing cross steel 14 is connected to the adapter plate, and the other side of the adapter plate is connected to the replaceable cross steel 10.

[0078] Similarly, the other side of the replaceable cross-shaped steel 10 is also connected to the adapter plate and the main load-bearing cross-shaped steel 14.

[0079] More specifically, the strength of the main load-bearing cross steel 14 is higher than that of the replaceable cross steel 10.

[0080] Specifically, vertically, the upper end of the supporting steel beam 11 is hinged to the jack 12, and the upper end of the jack 12 is hinged to the main load-bearing cross steel 14. The hinged fixing form can cooperate with the hydraulic damper 32 between the column piers 3, thereby realizing the adjustment of the single reset reinforcement structure.

[0081] Specifically, such as Figure 7 As shown, the connecting plate is dog-bone shaped. When the force transmission plate 5 rotates, causing the connecting plate 8 to rotate, the connecting plate 8 will undergo translation and rotation. The connecting piece in the middle of the connecting plate 8 passes through the curved groove 13 and is fixed to the connecting steel plate 15.

[0082] Specifically, such as Figure 8 As shown, the support plate 7 is fixed between two connecting plates 8. Multiple extended bearing plates 6 are provided on the upper end of the support plate 7, and the multiple extended bearing plates 6 are arranged in a diffused manner. A layer of divergent steel mesh 9 is also laid on the upper end of all the extended bearing plates 6 above each level of the support plate 7, which strengthens the integrity of all the extended bearing plates 6 on each level of the support plate 7.

[0083] Specifically, the extended bearing plate 6, support plate 7, and connecting plate 8 are made of high-strength steel.

[0084] Meanwhile, the holes in the divergent steel mesh 9 do not obstruct the passage of soil during the repositioning and reinforcement structure adjustment process.

[0085] Specifically, such as Figures 9 to 10 As shown, the extended load-bearing plate 6, support plate 7, connecting plate 8, and diverging steel mesh 9 are all embedded in the flexible soil at the bridge abutment 2, and a portion of the load transfer plate 5 is also embedded in the flexible soil at the bridge abutment 2. A transition zone is formed between the position where the load transfer plate 5 is exposed in the flexible soil and the position where it is embedded in the flexible soil. A rectangular concrete retaining structure 20 is provided around the transition zone to adapt to the movement trajectory of the load transfer plate 5.

[0086] Specifically, the force transmission plate 5 and the rectangular concrete enclosure structure 20 are connected by chains to extendable telescopic rods 21 at the top and bottom. The telescopic rods 21 work with the force transmission plate 5 to enclose the soil in the flexible soil body, preventing a large amount of soil from leaking out of the area of ​​the flexible soil body exposed from the force transmission plate 5.

[0087] Specifically, the telescopic rod 21 is fixedly connected to the rectangular concrete enclosure structure 20 through metal embedded parts, and the telescopic rod 21 is connected to the force transmission plate 5 through a circular chain, so that the force transmission plate 5 and the end of the telescopic rod 21 can rotate slightly to adapt to the movement trend of the force transmission plate 5.

[0088] Specifically, such as Figures 11 to 13 As shown, the function of the soil reinforcement structure is to reinforce the soil near area 2 of the bridge abutment, enhance its overall integrity, and solidify the soil in local areas into curved surfaces, such as... Figure 11As shown. Simultaneously, the distance between the top of the reinforced soil area 40 and the top surface 30 of the bridge abutment soil is gradually varied, with this vertical distance gradually increasing from bridge abutment 2 away from it. Based on this gradual trend, the future soil settlement will also gradually increase.

[0089] Specifically, the flexible soil volume in the abutment area 2 of the wide bridge is extremely large, and the loads exerted on the soil in this area by passing vehicles during bridge use vary. Therefore, the flexible soil in the abutment area 2 is prone to uneven settlement, meaning that the soil on both sides of the concrete split wall 4 is prone to different settlements. When the soil on both sides of the concrete split wall 4 settles differently, the positions of the connecting plates 8 on both sides of the concrete split wall 4 will also be different. At this time, the rotation angle and height of the connecting steel plate 15 will also be different. In this case, the replaceable cross-shaped steel 10 will suffer torsional and shear failure. When the replaceable cross-shaped steel 10 fails during use, the jacks 12 and hydraulic dampers 32 can be used simultaneously to readjust and reset the position of the reinforcement structure, and the replaceable cross-shaped steel 10 can be replaced at the same time.

[0090] The concrete split wall 4 should have an inspection hole on the side wall near the bridgehead 2, so that the staff can replace the replaceable cross-shaped steel 10 through the inspection hole later.

[0091] Wide bridges are greatly affected by vehicle traffic and soil geology during long-term use. In particular, wide bridges have a large volume of excavated soil, which can easily lead to uneven soil settlement after long-term use. The combination of replaceable cross-shaped steel 10 and repositioning reinforcement structure can meet the application conditions of soil settlement in wide bridges.

[0092] The construction method of this application includes the following steps:

[0093] Complete the construction of bridge deck 1, bridge abutment 2, column pier 3, and concrete split wall 4;

[0094] Step A also includes the construction of the steel structure within the concrete split wall 4, namely the construction of supporting steel beams 11, jacks 12, main load-bearing cross steel 14, connecting steel plates 15, and other structures.

[0095] The construction of concrete split wall 4 in step A includes the construction of curved groove 13 in concrete split wall 4;

[0096] B. Fixing plate 31 and circular collar 33;

[0097] C. Connect the force transmission plate 5 to the circular collar 33 in a movable manner, and then install the hydraulic damper 32;

[0098] D. Fix the force transmission plate 5 to a connecting plate 8;

[0099] E. Temporarily fix the connecting plate 8 on the outside of the concrete split wall 4;

[0100] F. Construct the flexible soil on the two sides of the bridge abutment from bottom to top, and construct the elevation up to the bottom surface of the lowest first-level support plate 7;

[0101] F. Securely connect the lowest-level support plate 7 between the two connecting plates 8;

[0102] G. An extended bearing plate 6 is fixedly connected to the lowest level support plate 7, and a divergent steel mesh 9 is laid above the extended bearing plate 6;

[0103] H. Continue the construction of the flexible soil on both sides of the bridge abutment, and raise the elevation to the bottom surface of the support plate 7 at the second-to-last elevation level;

[0104] I. Repeat steps F to H until the elevation of the flexible soil is level with the top surface of the bridge abutment soil at 30mm.

[0105] The temporary fixing step in step E can be achieved by fixing the main load-bearing cross steel 14 in the inspection hole, and then it can be removed after step I is completed.

[0106] Specifically, such as Figures 11 to 13 As shown, the split wall enclosure 50 divides the reinforced soil area 40, and the two parts of the reinforced soil area 40 after division are adjusted by their respective reset and reinforcement structures.

[0107] Specifically, the adjustment of the repositioning and reinforcement structure is related to the self-weight and lateral pressure of the flexible soil outside the reinforcement soil range of 40. The engineering designers should combine the physical properties of the flexible soil and the specific engineering conditions to reasonably set the distance from the support plate 7 to the end face of the extended bearing plate 6 away from the bridge abutment 2, and the distance from the end face of the extended bearing plate 6 near the bridge abutment 2 to the support plate 7. By adjusting the above distances, the torsional effect caused by self-weight and lateral pressure can be reduced, which will facilitate the subsequent adjustment of the position of the repositioning and reinforcement structure.

[0108] Specifically, after construction, the flexible soil in area 2 of the bridge abutment will form a bridge cone slope. This cone slope should be reinforced using common municipal engineering reinforcement methods. A suitable area for drilling into the flexible soil on the side of the cone slope should be provided. This is so that after long-term service, if the density of the flexible soil in area 2 of the bridge abutment becomes too high, and the hydraulic damper 32 pressurizes to rotate the force transmission plate 5, the density of the flexible soil in this area can be reduced by drilling into the cone slope, facilitating the rotation of the force transmission plate 5 and ultimately facilitating the repositioning and lifting of the reinforcement structure.

[0109] After the bridge approach slab slab slab occurred, the absolute position of the reinforced soil area remained unchanged at 40 meters, but the top surface of the soil at 30 meters gradually decreased in elevation, and settlement had already occurred. Figure 13 Mid-rangea When the settlement accumulates to a certain extent, the hydraulic damper 32 needs to be pressurized and the jack 12 needs to be used to load the main load-bearing cross steel 14, so that the force transmission plate 5 rotates, maintaining the distance between the top surface 30 of the bridge abutment soil and the reinforced soil area 40. a Without changing the position, raise the top of the reinforced soil area by 40 mm. b ,final a = b Even if the phenomenon of vehicles bouncing off the bridgehead is eliminated.

[0110] This invention addresses the installation of a concrete split wall 4 at the bridgehead 2 position on a wide bridge. The concrete split wall 4 separates the flexible soil and provides support for two sets of repositioning and reinforcement structures, thereby reducing the weight load of the soil that the repositioning and reinforcement structure on one side needs to bear.

[0111] This invention uses a hydraulic damper and a hinged jack to adjust the repositioning and reinforcement structure, and can lift and reset the reinforcement structure by loading after a bridge approach slab settlement occurs.

[0112] This invention can shorten the construction period for solving the problem of bridge approach slab settlement on wide bridges and improve the convenience of urban road traffic.

Claims

1. A bridge approach anti-slab settlement structure suitable for wide bridges, comprising two parallel bridge approach ends (2), a bridge deck (1) disposed on one side of each bridge approach end (2), and piers (3) supporting each bridge deck (1), characterized in that: A concrete split wall (4) is provided on the side of the gap between the two bridgeheads (2) away from the bridge deck (1). A split wall connection component is provided on both sides of the concrete split wall (4). The split wall connection component is connected to one side of the resetting and reinforcing structure in the flexible soil, and the other side of the resetting and reinforcing structure is connected to the force transmission plate (5). The repositioning and reinforcement structure on the outside of each bridgehead (2) includes two connecting plates (8). One connecting plate (8) is connected to the split wall connecting assembly at the concrete split wall (4), and the other connecting plate (8) is connected to the force transmission plate (5). The concrete split wall (4) is an internal air structure. The two side walls of the concrete split wall (4) separate the flexible soil outside the two bridgeheads (2). At the same time, the split wall connecting components in the concrete split wall (4) provide support for the repositioning and reinforcement structure. The split wall connection assembly includes a curved groove (13) in the concrete split wall (4) and a connecting steel plate (15) on the inner side of the wall. One side of the connecting plate (8) is connected to the connecting steel plate (15) through a connector passing through the curved groove (13). An adjustment structure is provided between the column piers (3) to drive the force transmission plate (5) to rotate, thereby raising and resetting the reinforcement structure.

2. The anti-bridge approach slab structure for wide-width bridges according to claim 1, characterized in that: The repositioning and reinforcement structure is not in contact with the side wall of the bridge abutment (2), and the repositioning and reinforcement structure is a multi-level structure.

3. The anti-bridge approach slab structure for wide-width bridges according to claim 1, characterized in that: The concrete split wall (4) is provided with a transverse support steel beam (11) inside, and the support steel beam (11) abuts against the two inner side walls of the concrete split wall (4).

4. The anti-bridge approach slab structure for wide-width bridges according to claim 1, characterized in that: A multi-level support plate (7) is provided between the two connecting plates (8), and each support plate (7) is a horizontally convex arc surface.

5. The anti-bridge approach slab structure for wide-width bridges according to claim 4, characterized in that: Each support plate (7) is provided with multiple extended bearing plates (6) to expand the range of flexible soil reinforcement. The extended bearing plates (6) are radiating away from the bridgehead (2).

6. A bridge approach slab prevention structure suitable for wide bridges according to claim 5, characterized in that: Each layer of extended bearing plate (6) is provided with a divergent steel mesh (9) to ensure that all extended bearing plates (6) on each level are uniformly loaded. The divergent steel mesh (9) is in the shape of a divergent arc.

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