Bridge head vehicle bumping prevention structure

Abstract

The invention provides a bridgehead vehicle jumping prevention structure which comprises a bridge, a bridgehead transition slab and a bridge abutment, the long end of the bridge is rotationally connected with the bridgehead transition slab, and the bridge abutment is located below the rotationally connected part of the bridge and the bridgehead transition slab; from the bridge to the bridge end transition slab, the top face of the bridge abutment is in a gradually-lowered step shape, and a soil foundation part is arranged between the top face of the bridge abutment and the bridge end transition slab. Through the rotatable bridgehead transition slab, the bridge abutment with the step-shaped design and the soil base part matched with the bridge abutment, the bridge, the bridgehead transition slab and the top surface of a normal road are connected relatively smoothly no matter when the bridge is built or after the bridge is put into use, cliff type height reduction cannot be generated, and the bridgehead bumping disease is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of the connection between bridge engineering and subgrade engineering, and particularly relates to a structure for preventing vehicle bump at bridge heads. Background Art

[0002] The road and bridge transition section is a difficult point in road construction. The differential settlement between the bridge structure and the road behind the abutment will cause vehicle bump at bridge heads to varying degrees, which seriously affects the driving comfort and safety of the road.

[0003] Vehicle bump at bridge heads is a common problem in road engineering. Due to the influence of factors such as traffic loads, vehicle bump diseases occur in some road and bridge transition sections at the early stage of road operation. Therefore, how to delay and eliminate vehicle bump diseases at bridge heads is an urgent problem to be solved in the construction of roads at all levels. Summary of the Invention

[0004] The purpose of the present invention is to provide a structure for preventing vehicle bump at bridge heads to solve the deficiencies in the above background art.

[0005] The technical solution of the present invention is: a structure for preventing vehicle bump at bridge heads, which includes a bridge, a bridge approach slab and an abutment. The long end of the bridge is rotatably connected to the bridge approach slab, and the abutment is located below the rotatable connection part of the bridge and the bridge approach slab. From the bridge to the bridge approach slab, the top surface of the abutment is in a stepped shape that gradually decreases, and there is a soil base between the top surface of the abutment and the bridge approach slab.

[0006] Preferably, the long end of the bridge is provided with a first arc-shaped groove with an opening facing the bridge approach slab, and the side end of the bridge approach slab is provided with a first arc-shaped convex surface rotatably connected to the first arc-shaped groove. The axes of the first arc-shaped groove and the first arc-shaped convex surface are horizontal.

[0007] Preferably, a second arc-shaped groove recessed from the bridge approach slab to the bridge is provided in the first arc-shaped groove, and a ball rotatably connected to the second arc-shaped groove is configured at the side end of the bridge approach slab. Part of the spherical surface of the ball protrudes from the first arc-shaped convex surface, and the axis of the second arc-shaped groove is horizontal.

[0008] Preferably, the stepped shape includes a top step surface, a sub-top step surface, several intermediate step surfaces and a bottom step surface that gradually decrease from the bridge to the bridge approach slab. The long end of the bridge is located on the top step surface, and the width of the sub-top step surface > the width of the intermediate step surface > the width of the bottom step surface.

[0009] Preferably, the top step surface and the secondary top step surface are connected by a vertical step wall, and guiding ribs extending along the longitudinal direction of the bridge are configured on the vertical step wall, and a soil extrusion block is movably connected to the guiding ribs; a force transmission block is arranged at the bottom of the approach slab. When the approach slab rotates, the soil extrusion block can be extruded by the force transmission block and move along the axial direction of the guiding ribs.

[0010] Preferably, a guiding inclined surface is arranged at the bottom of the force transmission block, and the guiding inclined surface inclines from the bridge towards the approach slab.

[0011] Preferably, a second arc convex surface is arranged at the top of the soil extrusion block, and the second arc convex surface abuts against the guiding inclined surface.

[0012] Preferably, along the direction away from the bridge, the widths of the plurality of intermediate step surfaces gradually decrease.

[0013] Preferably, a bridge approach inclined surface is arranged at the long end of the bridge, and the bridge approach inclined surface inclines from the top surface of the bridge towards the top surface of the approach slab.

[0014] The beneficial effects of the present invention are as follows: through the rotatable approach slab, the abutment with a stepped design and the soil base portion adapted thereto, it is realized that whether at the time of completion or after being put into use, the top surfaces of the bridge, the approach slab and the normal road are relatively smoothly connected, and there will be no cliff-like height drop, preventing the occurrence of the disease of bump at bridge head. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structure diagram of an embodiment of the present invention;

[0016] Figure 2 is the enlarged view of the structure at A in the attached Figure 1 of the embodiment of the present invention.

[0017] In the figure:

[0018] 1. Bridge; 11. First arc groove; 12. Second arc groove; 13. Bridge approach inclined surface;

[0019] 2. Approach slab; 21. First arc convex surface;

[0020] 3. Abutment; 31. Top step surface; 32. Secondary top step surface; 33. Intermediate step surface; 34. Bottom step surface; 35. Vertical step wall;

[0021] 4. Ball;

[0022] 5. Guiding rib;

[0023] 6. Soil extrusion block; 61. Second arc convex surface;

[0024] 7. Force transmission block; 71. Guiding inclined surface;

[0025] 8. Soil base part. Specific implementation manner

[0026] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0028] Refer to the attached Figure 1-2 , the embodiments of the present invention provide a structure for preventing vehicle bumping at bridge heads, which includes a bridge 1, a bridge approach slab 2 and an abutment 3. The long end of the bridge 1 is rotatably connected to the bridge approach slab 2, and the side of the bridge approach slab 2 away from the bridge 1 is connected to a normal road. The abutment 3 is located below the rotating connection part of the bridge 1 and the bridge approach slab 2; from the bridge 1 to the bridge approach slab 2, the top surface of the abutment 3 is in a stepped shape that gradually decreases. There is a soil base part 8 between the top surface of the abutment 3 and the bridge approach slab 2. When the structure for preventing vehicle bumping at bridge heads (i.e., the road-bridge transition section) is built, the soil base part 8 makes the top surface of the bridge approach slab 2 smoothly connected to the top surface of the normal road.

[0029] The above-mentioned abutment 3 is made of the same material as the existing abutment, both are made of concrete. The direct results brought by the above technical solution at least include: ① The approach slab 2 connects between the bridge 1 and the normal road. ② It is realized by the abutment 3 with the above stepped design: along the direction away from the bridge 1, the thickness of the soil base 8 gradually increases. ③ When the soil body of the soil base 8 settles and shrinks, the end of the approach slab 2 close to the bridge 1 can rotate, and the end of the approach slab 2 away from the bridge 1 will gradually sink. Through the synergistic effect of the above ①②③, when the soil body of the soil base 8 settles and shrinks after the anti-jumping structure of this bridge head is put into use, along the direction away from the bridge 1, the degree of descent of the top surface of the soil base 8 will gradually increase, and it will not directly show a cliff-like drop at the connection between the bridge 1 and the approach slab 2 (which will cause the disease of bridge head jumping), nor will it show a cliff-like drop in the middle of the approach slab 2 (which will cause the fracture of the approach slab 2 and the disease of bridge head jumping). Therefore, by adopting the above technical solution, it can be achieved that whether at the time of completion or after being put into use, the top surfaces of the bridge 1, the approach slab 2 and the normal road are relatively smoothly connected, and there will be no cliff-like height drop, preventing the occurrence of the disease of bridge head jumping.

[0030] There are various schemes for the rotational connection between the long end of the bridge 1 and the approach slab 2. This embodiment only exemplarily lists some feasible schemes: Refer to the attached Figure 2 , the long end of the bridge 1 is provided with a first arc-shaped groove 11 with an opening facing the approach slab 2, and the side end of the approach slab 2 is provided with a first arc-shaped convex surface 21 rotatably connected to the first arc-shaped groove 11. The axes of the first arc-shaped groove 11 and the first arc-shaped convex surface 21 are horizontal. When the soil base 8 undergoes settlement and shrinkage, the height of the top surface of the soil base 8 will drop, resulting in the approach slab 2 losing support and falling. And along the direction away from the bridge 1, the degree of descent of the top surface of the soil base 8 will gradually increase, then along the direction away from the bridge 1, the degree of descent of the approach slab 2 will gradually increase. During this process, the first arc-shaped convex surface 21 will rotate in the first arc-shaped groove 11 to adapt to the trend that "along the direction away from the bridge 1, the degree of descent of the approach slab 2 will gradually increase", avoiding a large joint at the connection between the approach slab 2 and the bridge 1.

[0031] Furthermore, a second arc-shaped groove 12 that is recessed from the bridge approach slab 2 towards the bridge 1 can also be provided in the first arc-shaped groove 11. A ball 4 rotatably connected to the second arc-shaped groove 12 is configured at the side end of the bridge approach slab 2. The ball 4 is rotatably connected to the bridge approach slab 2, and at least a part of the spherical surface of the ball 4 protrudes from the first arc-shaped convex surface 21. The axis of the second arc-shaped groove 12 is horizontal. In some preferred embodiments, at least half of the ball 4 is located within the bridge approach slab 2, and the remaining part protrudes from the first arc-shaped convex surface 21 and is rotatably connected to the second arc-shaped groove 12. After the bridge approach slab 2 rotates relative to the bridge 1, the ball 4 rotates within the second arc-shaped groove 12, thereby reducing the frictional force between the bridge 1 and the bridge approach slab 2 and preventing the bridge approach slab 2 from breaking. At the same time, the ball 4 is constrained within the second arc-shaped groove 12, and the axial inner end surface of the second arc-shaped groove 12 can be used to restrict the ball 4 from moving horizontally, enabling the ball 4 to only move up and down and not left and right, thereby preventing the bridge approach slab 2 and the bridge 1 from undergoing displacement along the axis of the first arc-shaped groove 11.

[0032] Refer to the attached Figure 1 , the stepped shape on the top surface of the abutment 3 includes a top stepped surface 31, a sub-top stepped surface 32, several intermediate stepped surfaces 33, and a bottom stepped surface 34 that gradually decrease from the bridge 1 to the bridge approach slab 2. The long end portion of the bridge 1 is located on the top stepped surface 31. The width of the sub-top stepped surface 32 > the width of the intermediate stepped surfaces 33 > the width of the bottom stepped surface 34, and: along the direction away from the bridge 1, the widths of several intermediate stepped surfaces 33 gradually decrease. With this technical solution, the closer the soil base 8 is to the bridge 1, the smaller the settlement amount that can occur, avoiding a cliff-like drop directly at the connection between the bridge 1 and the bridge approach slab 2.

[0033] Furthermore, the top stepped surface 31 and the sub-top stepped surface 32 are connected by a vertical stepped wall 35. A guiding rib 5 extending along the longitudinal direction of the bridge 1 is configured on the vertical stepped wall 35. A soil extrusion block 6 is movably connected to the guiding rib 5. A second arc-shaped convex surface 61 is provided at the top of the soil extrusion block 6; a force transmission block 7 is provided at the bottom of the bridge approach slab 2. A guiding inclined surface 71 is provided at the bottom of the force transmission block 7. The guiding inclined surface 71 inclines from the bridge 1 towards the bridge approach slab 2. The second arc-shaped convex surface 61 abuts against the guiding inclined surface 71; when the bridge approach slab 2 rotates, the soil extrusion block 6 can be pushed by the force transmission block 7 and move along the axis of the guiding rib 5.

[0034] When the soil base 8 undergoes settlement and shrinkage, the bridge approach slab 2 will rotate, and then drive the bottom of the force transmission block 7 to rotate towards the bridge 1, further pushing and squeezing the soil extrusion block 6, causing the soil extrusion block 6 to gradually approach the vertical stepped wall 35. During the process of the soil extrusion block 6 approaching the vertical stepped wall 35, the soil between its side wall and the vertical stepped wall 35 will be gradually squeezed to be more solid, so as to reduce the degree of subsequent settlement and shrinkage of this part of the soil, and further reduce the possible height difference generated at the connection between the bridge 1 and the bridge approach slab 2, avoiding the occurrence of the bridge bumping disease.

[0035] In some more excellent implementation cases, a bridge guiding inclined plane 13 is provided at the long end of the bridge 1. The bridge guiding inclined plane 13 inclines from the top surface of the bridge 1 to the top surface of the approach slab 2, making the connection between the top surface of the bridge 1 and the top surface of the approach slab 2 smoother. More preferably, during construction, the top surface of the approach slab 2 is flush with the top surface of the normal road, both being horizontal. Due to the downward inclination of the bridge guiding inclined plane 13, a small acute angle is formed between the plane where the bridge guiding inclined plane 13 is located and the plane where the top surface of the approach slab 2 is located. When the soil base 8 settles and shrinks, the approach slab 2 rotates, causing the plane where the approach slab 2 is located to coincide with the plane where the bridge guiding inclined plane 13 is located. When the soil base 8 further settles and shrinks, the approach slab 2 continues to rotate, resulting in a small acute angle being formed again between the plane where the approach slab 2 is located and the plane where the bridge guiding inclined plane 13 is located. The two small acute angles generated can both serve as a kind of feedback information, providing reference when technicians optimize the stepped size specifications of the abutment 3 and the size specifications of the soil base 8. Through multiple feedbacks and optimizations, the optimal stepped size specifications of the abutment 3 and the size specifications of the soil base 8 can be obtained, making the connection between the bridge 1, the approach slab 2 and the normal road smoother.

[0036] Compared with the prior art, the beneficial effects of the present invention at least include: through the rotatable approach slab 2, the abutment 3 with a stepped design and the soil base 8 adapted thereto, it is realized that whether at the time of completion or after being put into use, the top surfaces of the bridge 1, the approach slab 2 and the normal road are connected relatively smoothly, without a cliff-like height drop, preventing the occurrence of the disease of bump at bridge head.

[0037] The above are the preferred implementation manners of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A structure for preventing vehicle jumping at bridge heads, characterized in that, It includes a bridge, a transition slab and an abutment. The long end of the bridge is rotatably connected to the transition slab, and the abutment is located below the rotatable connection part of the bridge and the transition slab; from the bridge to the transition slab, the top surface of the abutment is in a stepped shape that gradually decreases, and a soil base is provided between the top surface of the abutment and the transition slab.

2. The structure for preventing vehicle bounce at bridgeheads according to claim 1, characterized in that, The long end of the bridge is provided with a first arc-shaped groove with an opening facing the transition slab, and the side end of the transition slab is provided with a first arc-shaped convex surface rotatably connected to the first arc-shaped groove. The axes of the first arc-shaped groove and the first arc-shaped convex surface are horizontal.

3. The bridgehead anti-bumping structure according to claim 2, wherein, A second arc-shaped groove recessed from the transition slab to the bridge is provided in the first arc-shaped groove. A ball rotatably connected to the second arc-shaped groove is configured at the side end of the transition slab. A part of the spherical surface of the ball protrudes from the first arc-shaped convex surface. The axis of the second arc-shaped groove is horizontal.

4. The bridgehead anti-bumping structure according to any one of claims 1-3, characterized in that, The stepped shape includes a top step surface, a sub-top step surface, several intermediate step surfaces and a bottom step surface that gradually decrease from the bridge to the transition slab. The long end of the bridge is located on the top step surface. The width of the sub-top step surface > the width of the intermediate step surface > the width of the bottom step surface.

5. The bridgehead anti-jumping structure according to claim 4, characterized in that, The top step surface and the sub-top step surface are connected by a vertical step wall. A guiding rib extending along the longitudinal direction of the bridge is configured on the vertical step wall. An earth extrusion block is movably connected to the guiding rib; a force transmission block is provided at the bottom of the transition slab. When the transition slab rotates, the earth extrusion block can be extruded by the force transmission block and move along the axial direction of the guiding rib.

6. The structure for preventing vehicle bumping at bridge heads according to claim 5, wherein, A guiding inclined surface is provided at the bottom of the force transmission block. The guiding inclined surface inclines from the bridge to the transition slab.

7. The structure for preventing vehicle bounce at bridge head according to claim 6, characterized in that, A second arc-shaped convex surface is provided at the top of the earth extrusion block. The second arc-shaped convex surface abuts against the guiding inclined surface.

8. The bridgehead anti-bumping structure according to any one of claims 5-7, characterized in that, In the direction away from the bridge, the widths of the several intermediate step surfaces gradually decrease.

9. The structure for preventing vehicle bounce at bridge head according to claim 8, characterized in that, The long end of the bridge is provided with a bridge approach inclined surface that inclines from the top surface of the bridge to the top surface of the transition slab.

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