Rigidity transition roadbed structure for road and bridge transition section

Abstract

The utility model discloses a rigidity transition subgrade structure for a road and bridge transition section, which comprises a bridge abutment and a subgrade filling layer which are positioned on a ground surface layer, the subgrade filling layer is positioned on one side of the bridge abutment, a pavement is paved above the bridge abutment and the subgrade filling layer, a plurality of aggregate pile components are arranged in the subgrade filling layer, and the aggregate pile components are arranged on the ground surface layer. The adjacent aggregate pile assemblies are connected through steel plates, the roadbed filling layer comprises upper-layer filling soil and lower-layer filling soil, a plurality of pile holes are formed in the lower-layer filling soil, the lower portions of the aggregate pile assemblies are embedded into the pile holes, and the upper-layer filling soil is filled in the upper portions of the aggregate pile assemblies. The aggregate pile assemblies are adopted, the lower portions of the aggregate pile assemblies are embedded into the lower-layer filling soil, the upper portions of the aggregate pile assemblies are filled with the upper-layer filling soil, and the adjacent aggregate pile assemblies are connected through the steel plates, so that the bearing capacity of the road and bridge transition section is improved, and connection transition of a rigid bridge abutment and a flexible road surface is achieved; the construction cost is reduced; and the construction operation can be quickly and efficiently completed.

Description

Technical Field

[0001] The utility model relates to the technical field of road subgrade, in particular to a rigidity transition subgrade structure used for a road-bridge transition section. Background Art

[0002] The road-bridge transition section where the rigid abutment and the flexible embankment meet is a relatively weak link in the project. Often, due to insufficient compaction of the roadbed or incomplete soft foundation treatment, the soil continues to compact under the weight of the soil and the vehicle load, causing the road surface to sink, which in turn causes the bridge head to jump. The occurrence of bridge head jumping greatly reduces the safety, comfort and economy of vehicle operation.

[0003] At present, the measures to deal with differential settlement in transition section through composite foundation mainly include: pile foundation, box foundation, raft foundation, cement soil mixing pile, spiral pipe pile foundation, etc. From the actual effect, the construction process of box foundation or raft foundation is complex, the construction period is long, and the cost is high; cement soil mixing pile has a short construction period, simple process, low cost, but the bearing capacity is relatively weaker than other foundation forms; spiral pipe pile foundation has high requirements on geological conditions, and its stability and corrosion resistance are poor in soft foundation.

[0004] At present, pile foundations, box foundations or raft foundations are usually used for pile foundation structures under soft foundation conditions, all of which have the characteristics of long construction period and high cost. Cement soil mixing piles have weak bearing capacity and spiral pipe pile foundations have poor corrosion resistance. Utility Model Content

[0005] In view of the above problems in the prior art, the utility model provides a rigid transition roadbed structure for a road-bridge transition section, which solves the problem of road surface sinking in the existing road-bridge transition section due to insufficient roadbed compaction or incomplete soft foundation treatment.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A stiffness transition roadbed structure for a road-bridge transition section is provided, comprising an abutment and a roadbed fill layer located on a surface layer, the roadbed fill layer being located on one side of the abutment, and a road pavement being laid above the abutment and the roadbed fill layer, a plurality of aggregate pile assemblies being arranged in the roadbed fill layer, adjacent aggregate pile assemblies being connected by steel plates, the roadbed fill layer comprising an upper fill layer and a lower fill layer, a plurality of pile holes being opened in the lower fill layer, the lower portion of the aggregate pile assembly being embedded in the pile holes, and the upper fill layer being filled on the upper portion of the aggregate pile assembly.

[0008] The utility model arranges a plurality of aggregate pile assemblies in a roadbed fill layer, wherein the lower parts of the plurality of aggregate pile assemblies are embedded in a lower layer of fill, and an upper layer of fill is filled on the upper parts of the aggregate pile assemblies, and adjacent aggregate pile assemblies are connected by steel plates, thereby improving the bearing capacity of the road-bridge transition section, realizing the connection and transition between the rigid abutment and the flexible road surface, reducing construction costs, and being able to complete construction work quickly and efficiently.

[0009] Furthermore, the aggregate pile assembly includes a pile barrel with a hollow interior, and the hollow interior of the pile barrel is filled with recycled aggregate;

[0010] The lower part of the pile cylinder is embedded in the pile hole, and the upper part of the pile cylinder is sleeved with a connecting cylinder, and adjacent connecting cylinders are connected by steel plates.

[0011] Furthermore, four connection grooves are evenly arranged on the outer circumference of the connection tube; the two ends of the steel plate are respectively embedded in the corresponding connection grooves on the adjacent connection tubes and fixed by welding.

[0012] Furthermore, a pile cap member formed with a concrete pile cap is provided on the end of the pile tube passing through the connecting tube.

[0013] Furthermore, the pile cap is a rectangle with a hollow interior and an opening at the top, and a mounting hole matching the pile barrel is provided on the side of the rectangular pile cap opposite to the opening.

[0014] Furthermore, a crushed stone cushion layer is provided between the road surface pavement and the roadbed filling layer.

[0015] Furthermore, a slab layer is provided between the road pavement and the gravel cushion layer.

[0016] The utility model discloses a rigidity transition roadbed structure for a road-bridge transition section, and its beneficial effects are:

[0017] The utility model arranges a plurality of aggregate pile assemblies in a roadbed fill layer, wherein the lower parts of the plurality of aggregate pile assemblies are embedded in a lower layer of fill, and an upper layer of fill is filled on the upper parts of the aggregate pile assemblies, and adjacent aggregate pile assemblies are connected by steel plates, thereby improving the bearing capacity of the road-bridge transition section, realizing the connection and transition between the rigid abutment and the flexible road surface, reducing construction costs, and being able to complete construction work quickly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of a stiffness transition roadbed structure used in a road-bridge transition section.

[0019] Figure 2 It is a schematic diagram of the vertical connection structure of the aggregate pile assembly of the utility model.

[0020] Figure 3 It is a schematic diagram of the planar connection structure of the aggregate pile assembly of the utility model.

[0021] Among them, 1. Surface layer; 2. Abutment; 3. Roadbed fill layer; 31. Upper fill layer; 32. Lower fill layer; 33. Pile hole; 4. Road pavement; 5. Aggregate pile assembly; 51. Pile tube; 52. Connecting tube; 53. Connecting groove; 54. Pile cap; 55. Installation hole; 6. Steel plate; 7. Gravel cushion layer; 8. Board layer. DETAILED DESCRIPTION

[0022] The specific implementation modes of the present invention are described to facilitate the understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all utility model creations utilizing the concept of the present invention are protected.

[0023] Example 1

[0024] refer to Figure 1 , which is a structural schematic diagram of a rigidity transition roadbed structure for a road-bridge transition section in this embodiment, and its purpose is to solve the problem of road surface sinking in the existing road-bridge transition section due to insufficient roadbed compaction or incomplete soft foundation treatment. The specific structure in this embodiment will be described in detail below.

[0025] A rigidity transition roadbed structure for a road-bridge transition section comprises an abutment 2 and a roadbed fill layer 3 located on a surface layer 1, wherein the roadbed fill layer 3 is located on one side of the abutment 2, and a road pavement 4 is laid above the abutment 2 and the roadbed fill layer 3.

[0026] Specifically, a plurality of aggregate pile assemblies 5 are arranged in the roadbed fill layer 3, and adjacent aggregate pile assemblies 5 are connected by steel plates 6. The roadbed fill layer 3 includes an upper layer of fill 31 and a lower layer of fill 32. A plurality of pile holes 33 are opened in the lower layer of fill 32. The lower part of the aggregate pile assembly 5 is embedded in the pile hole 33, and the upper layer of fill 31 is filled in the upper part of the aggregate pile assembly 5.

[0027] Specifically, a crushed stone cushion layer 7 is provided between the road surface pavement 4 and the roadbed filling layer 3 , and a slab layer 8 is provided between the road surface pavement 4 and the crushed stone cushion layer 7 .

[0028] In this embodiment, the surface layer 1 is the surface layer of the actual road, and the abutment 2 is the actual abutment on site. A concrete structure is adopted. The roadbed is filled on the surface layer 1 on one side of the abutment 2 to form a roadbed fill layer 3. The roadbed fill layer 3 is divided into an upper fill layer 31 and a lower fill layer 32. After the lower fill layer 32 is completed, a pile hole 33 is excavated in the lower fill layer 32.

[0029] Then, the lower parts of several aggregate pile assemblies 5 are embedded in the lower fill 32, the upper fill 31 is filled between the upper parts of several aggregate pile assemblies 5, and the adjacent aggregate pile assemblies 5 are connected by steel plates 6, thereby improving the bearing capacity of the road-bridge transition section, realizing the connection and transition between the rigid abutment and the flexible pavement, reducing construction costs and completing the construction work quickly and efficiently.

[0030] Next, a crushed stone cushion layer 7 is laid on top of several aggregate pile assemblies 5. The crushed stone cushion layer 7 is made of gravel with good permeability. After the crushed stone cushion layer 7 is laid, a slab layer 8 is laid on top of the crushed stone cushion layer 7. The slab layer 8 is made of reinforced concrete. The slab layer 8 is used to improve the overall bearing capacity of the roadbed fill layer 3.

[0031] Finally, a road pavement 4 is laid above the abutment 2 and the roadbed filling layer 3, and the road pavement 4 is cement concrete.

[0032] Example 2

[0033] refer to Figure 2-Figure 3 , which is a structural schematic diagram of a stiffness transition roadbed structure for a road-bridge transition section in this embodiment, and its purpose is to solve the problem of road surface sinking in the existing road-bridge transition section due to insufficient roadbed compaction or incomplete soft foundation treatment. Based on Example 1, this embodiment provides a further solution for the aggregate pile assembly 5. The specific structure of the aggregate pile assembly 5 in this embodiment will be described in detail below.

[0034] The aggregate pile assembly 5 comprises a pile cylinder 51 which is hollow inside. The hollow inside of the pile cylinder 51 is filled with recycled aggregate.

[0035] Specifically, the lower part of the pile tube 51 is embedded in the pile hole 33 , and the upper part of the pile tube 51 is sleeved with a connecting tube 52 , and adjacent connecting tubes 52 are connected by a steel plate 6 .

[0036] In this embodiment, the aggregate pile assembly 5 includes a pile barrel 51. The pile barrel 51 is cylindrical and hollow inside. The hollow inside of the pile barrel 51 is filled with recycled aggregate. The recycled aggregate is vibrated and compacted in the hollow inside of the pile barrel 51 to form a recycled aggregate pile.

[0037] The lower part of the pile tube 51 is embedded in the pile hole 33 opened on the lower fill 32, and a connecting tube 52 is sleeved on the upper part of the pile tube 51. The adjacent connecting tubes 52 are connected through the steel plate 6, and then the upper fill 31 is filled at the connected aggregate pile assembly 5.

[0038] Specifically, four connection grooves 53 are evenly arranged on the outer circumference of the connection tube 52 , and two ends of the steel plate 6 are respectively embedded in the corresponding connection grooves 53 on the adjacent connection tubes 52 and fixed by welding.

[0039] In this embodiment, the connecting tube 52 is cylindrical, and four connecting grooves 53 are evenly arranged on the outer circumference of the cylindrical connecting tube 52. The connecting grooves 53 are matched with the steel plate 6, so that the end of the steel plate 6 is embedded in the connecting grooves 53 and fixed by welding, so that the recycled aggregate pile, the pile tube 51, the connecting tube 52, the steel plate 6 and the roadbed fill layer 3 form an organic whole, thereby improving the bearing capacity of the road-bridge transition section, realizing the connection and transition between the rigid abutment and the flexible pavement, reducing construction costs and completing construction work quickly and efficiently.

[0040] Specifically, a pile cap member 54 for forming a concrete pile cap is provided on the end of the pile tube 51 passing through the connecting tube 52. The pile cap member 54 is a rectangle with a hollow interior and an opening at the top, and a mounting hole 55 matching the pile tube 51 is provided on the side opposite to the opening of the rectangular pile cap member 54.

[0041] In this embodiment, both ends of the connecting tube 52 are open, so that the pile tube 51 can pass through the connecting tube 52. A pile cap member 54 is provided on the end of the pile tube 51 passing through the connecting tube 52 through the pile tube 51 being embedded in the mounting hole 55. The pile cap member 54 is a rectangle with a hollow interior and an opening on the top, which is used for pouring concrete, so that concrete is formed through the pile cap member 54 to form a concrete pile cap. After the concrete pile cap is formed, the upper filling soil 31 is filled between adjacent concrete pile caps.

[0042] The working principle of a stiffness transition roadbed structure used in a road-bridge transition section of this scheme is:

[0043] In practical application, the utility model refers to Figure 1-Figure 3 , a roadbed fill is formed on the surface layer 1 on one side of the abutment 2 to form a roadbed fill layer 3, and the roadbed fill layer 3 is divided into an upper fill layer 31 and a lower fill layer 32. After the lower fill layer 32 is completed, a pile hole 33 is excavated on the lower fill layer 32.

[0044] Then, the lower parts of several aggregate pile assemblies 5 are embedded in the lower layer of fill 32, and the adjacent aggregate pile assemblies 5 are connected by connecting tubes 52 and steel plates 6, and the upper layer of fill 31 is filled between the upper parts of several aggregate pile assemblies 5, so that the aggregate pile assemblies 5, steel plates 6 and roadbed fill layer 3 form an organic whole, thereby improving the bearing capacity of the road-bridge transition section, realizing the connection and transition between the rigid abutment and the flexible pavement, reducing construction costs and completing the construction work quickly and efficiently.

[0045] Next, a crushed stone cushion layer 7 is laid on top of several aggregate pile assemblies 5. The crushed stone cushion layer 7 is made of gravel with good permeability. After the crushed stone cushion layer 7 is laid, a slab layer 8 is laid on top of the crushed stone cushion layer 7. The slab layer 8 is made of reinforced concrete. The slab layer 8 is used to improve the overall bearing capacity of the roadbed fill layer 3.

[0046] Finally, a road pavement 4 is laid above the abutment 2 and the roadbed filling layer 3, and the road pavement 4 is cement concrete.

[0047] Although the specific implementation of the utility model is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A stiffness transition roadbed structure for a road-bridge transition section, characterized in that: It comprises a bridge abutment (2) and a roadbed fill layer (3) located on a ground surface layer (1), wherein the roadbed fill layer (3) is located on one side of the bridge abutment (2), and a road surface pavement (4) is laid above the bridge abutment (2) and the roadbed fill layer (3); A plurality of aggregate pile assemblies (5) are arranged in the roadbed filling layer (3), and adjacent aggregate pile assemblies (5) are connected via steel plates (6); The roadbed fill layer (3) comprises an upper fill layer (31) and a lower fill layer (32), the lower fill layer (32) being provided with a plurality of pile holes (33), the lower portion of the aggregate pile assembly (5) being embedded in the pile holes (33), and the upper fill layer (31) being filled in the upper portion of the aggregate pile assembly (5).

2. The stiffness transition roadbed structure for a road-bridge transition section according to claim 1 is characterized in that: The aggregate pile assembly (5) comprises a pile cylinder (51) with a hollow interior, and the hollow interior of the pile cylinder (51) is filled with recycled aggregate; The lower part of the pile cylinder (51) is embedded in the pile hole (33), and the upper part of the pile cylinder (51) is sleeved with a connecting cylinder (52), and adjacent connecting cylinders (52) are connected by a steel plate (6).

3. The stiffness transition roadbed structure for a road-bridge transition section according to claim 2 is characterized in that: Four connection grooves (53) are evenly arranged on the outer circumference of the connection tube (52); the two ends of the steel plate (6) are respectively embedded in the opposite connection grooves (53) on the adjacent connection tubes (52) and fixed by welding.

4. The stiffness transition roadbed structure for a road-bridge transition section according to claim 3 is characterized in that: A pile cap member (54) for forming a concrete pile cap is provided on the end of the pile tube (51) passing through the connecting tube (52).

5. The stiffness transition roadbed structure for a road-bridge transition section according to claim 4 is characterized in that: The pile cap member (54) is a rectangle with a hollow interior and an opening at the top, and a mounting hole (55) matching the pile tube (51) is provided on the side of the rectangular pile cap member (54) opposite to the opening.

6. The stiffness transition roadbed structure for a road-bridge transition section according to claim 1, characterized in that: A crushed stone cushion layer (7) is provided between the road surface pavement (4) and the roadbed filling layer (3).

7. The stiffness transition roadbed structure for a road-bridge transition section according to claim 6 is characterized in that: A slab layer (8) is provided between the road surface pavement (4) and the crushed stone cushion layer (7).

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