A large cantilever structure for a traveling vehicle and a roadbed joint structure

Abstract

The present invention relates to a joint structure between a large cantilever structure and a roadbed, comprising a pavement layer, a large cantilever structure, a leveling layer, a flexible gasket, roadbed soil, and a slat. The large cantilever structure includes side walls, a top plate and corbels on the side walls, the slats resting horizontally on the corbels and roadbed soil and in contact with the side walls, the flexible gaskets positioned above the joint between the side walls and the slats, the leveling layer covering the flexible gaskets, the slats provided with a water-stable layer, and the pavement layer covering the water-stable layer and the leveling layer. Compared with existing technologies, the present invention provides a continuous, seamless pavement, good structural integrity, and low construction and maintenance costs.

Description

Technical Field

[0001] The present invention relates to the field of bridges and tunnels, and in particular to a joint structure between a large cantilever structure for a vehicle and a roadbed. Background Art

[0002] A tunnel is an underground structure buried in the earth. Its main types include mountain tunnels, underwater tunnels, and underground tunnels. Urban underground tunnels are a crucial component of urban expressways or trunk road networks, and have been increasingly used in urban construction in China in recent years. my country's cities are densely populated and have limited land resources, resulting in a shortage of urban land resources, especially in megacities. To achieve rapid urban transportation, surface or elevated expressways are often used. However, these methods can cause a series of problems during construction, including those affecting the urban environment, land use, and landscape.

[0003] Underground transportation systems have circulation characteristics such as one-way and direct access. At the same time, they have the advantages of reducing energy consumption, saving ground land, diverting vehicles, and reducing ground traffic pressure. Therefore, with the rapid development of cities in my country, the use of underground expressway systems that adapt to urban development trends and meet the requirements of energy conservation, environmental protection, and speed has increasingly obvious advantages and a very broad application prospect. Traditional underground passages are generally fully buried underground passages. Compared with ground expressways or elevated expressways, they have problems such as higher construction costs and greater excavation and support risks. In addition, traditional underground passages have higher management and maintenance costs due to the requirements of ventilation and fire protection. In the driving experience, especially in long-distance tunnel transportation, it is easy to cause visual depression or visual fatigue for the driver, thereby increasing the risk of driving. In order to better solve the above problems, cantilevered open tunnel structures came into being, and correspondingly there will be large cantilever structures for driving.

[0004] The large cantilever structure of a vehicle and the outer roadbed are generally composed of more than two materials. The underground part of the large cantilever structure of a vehicle is mostly a concrete structure. The stiffness and elastic modulus of the concrete structure are different from those of the surrounding soil layer, and uneven settlement will occur under the time and space effect. For driving on a large cantilever structure, it is easy to produce height differences at the cracks, and there will inevitably be joint problems. Traditional joints, such as the expansion joint structure of a bridge, use steel expansion joints to reduce cracks, deformation and uneven settlement at the joints, which reduces the integrity. Vehicles often "jump" at the expansion joints, affecting driving speed, safety and comfort. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a large cantilever structure for a traveling vehicle and a roadbed joint structure, so that the road surface is continuous and seamless, the road surface structure has good integrity, and the construction and operation and maintenance costs are low.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A joint structure between a large cantilever structure of a traveling vehicle and a roadbed, comprising a pavement layer, a large cantilever structure of the traveling vehicle, a leveling layer, a flexible gasket, roadbed soil, and a slat. The large cantilever structure of the traveling vehicle comprises a side wall, a top plate and a corbel on the side wall, the slat is horizontally placed on the corbel and the roadbed soil and in contact with the side wall, the flexible gasket is located above the joint between the side wall and the slat, the leveling layer covers the flexible gasket, the slat is provided with a water-stable layer, and the paving layer covers the water-stable layer and the leveling layer;

[0008] The joint structure between the large cantilever structure for driving and the roadbed creates a continuous and seamless pavement, provides a pleasant driving experience, eliminates vehicle bouncing, and creates a good overall landscape. The water-stabilizing layer and the slab serve as a stiffness transition zone, reducing cracks caused by uneven stiffness settlement between the large cantilever structure for driving and the roadbed soil, thereby forming a uniform transition and strengthening the integrity of the pavement structure.

[0009] Furthermore, a steel mesh is laid in the leveling layer.

[0010] Furthermore, the paving density of the steel mesh in the area above the flexible gasket is greater than the paving density of the steel mesh in the area not above the flexible gasket;

[0011] Denser paving of steel mesh above the flexible gasket can further reduce the crack width of the leveling layer under dynamic load.

[0012] Furthermore, the pavement layer is provided with a caulking joint, and the caulking joint is located directly above the joint between the side wall and the butt plate.

[0013] Furthermore, the caulking is filled with a flexible waterproof material;

[0014] Grooving and filling the joints above the side walls and the slabs with flexible waterproof materials can increase the surface ductility of the pavement layer, facilitate the formation of a uniform transition, and enhance the integrity of the structure.

[0015] Furthermore, the flexible waterproof material is polyurethane.

[0016] Furthermore, the flexible gasket is a rubber gasket.

[0017] Furthermore, the side walls are of uniform thickness, variable thickness, or a combination of uniform thickness walls and buttresses.

[0018] Furthermore, the top plate is a plate of uniform thickness, a plate of variable thickness, a rib plate structure or a box-type structure.

[0019] Furthermore, the top plate is an ordinary reinforced concrete structure, a prestressed concrete structure or a steel-concrete composite structure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The structure of the present invention includes a pavement layer, a large cantilever structure for driving, a leveling layer, a flexible gasket, a roadbed soil and a slab. The large cantilever structure for driving includes a side wall and a top plate and a corbel on the side wall. The slab is horizontally placed on the corbel and the roadbed soil and contacts the side wall. The flexible gasket is located above the joint between the side wall and the slab. The leveling layer covers the flexible gasket. A water-stable layer is provided on the slab. The pavement layer covers the water-stable layer and the leveling layer. The joint between the large cantilever structure for driving and the roadbed forms a continuous and seamless pavement. The driving experience is good, there is no vehicle jumping phenomenon, and the overall landscape is good. The water-stable layer and the slab serve as a stiffness transition zone, which can reduce cracks caused by uneven stiffness settlement between the large cantilever structure for driving and the roadbed soil, form a uniform transition, strengthen the integrity of the pavement structure, and stabilize the structure.

[0022] (2) The leveling layer of the present invention is paved with steel mesh, and the paving density of the steel mesh in the area above the flexible gasket is greater than the paving density of the steel mesh in the area not above the flexible gasket. The denser paving of the steel mesh above the flexible gasket can further reduce the crack width of the leveling layer under dynamic load and improve driving comfort.

[0023] (3) The pavement layer of the present invention is provided with a caulking joint, which is located directly above the joint between the side wall and the slats. The caulking joint is filled with a flexible waterproof material. A groove is opened above the joint between the side wall and the slats and the flexible waterproof material is filled in the caulking joint, which can increase the ductility of the pavement surface, facilitate the formation of a uniform transition, and enhance the integrity of the structure.

[0024] (4) When the structure of the present invention requires maintenance, the corresponding structural layer can be replaced according to the maintenance needs, which is convenient for maintenance, easy to manage during on-site maintenance, and has low operating costs;

[0025] (5) The construction process of the present invention only involves the steps of steel bar binding, concrete and water-stabilizing pouring, laying of pavement layer, grooving and caulking, etc. The process is simple and the difficulty of on-site construction is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention when the slab and the water-stabilizing layer are installed;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention when the leveling layer is installed;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 4 is a cross-sectional view of the present invention;

[0030] Description of the numbers in the figure:

[0031] 1. Anti-collision structure, 2. Auxiliary structure, 3. Pavement layer, 4. Grooves, 5. Large cantilever structure for driving, 6. Leveling layer, 7. Flexible gasket, 8. Roadbed soil, 9. Plate, 10. Water-stabilizing layer, 11. Steel mesh, 51. Top plate, 52. Side wall, 53. Corbel. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0033] Example 1

[0034] A structure for connecting a large cantilever structure of a vehicle and a roadbed, comprising a pavement layer 3, a large cantilever structure of the vehicle 5, a leveling layer 6, a flexible gasket 7, a roadbed soil body 8, and a slat 9. The large cantilever structure of the vehicle 5 includes a side wall 52 and a top plate 51 and a corbel 53 on the side wall 52. The top plate 51 is a cantilever structure, communicating with the outside of the tunnel and being semi-open. The slat 9 is horizontally placed on the corbel 53 and the roadbed soil body 8 and in contact with the side wall 52. The flexible gasket 7 is a rubber gasket located above the joint between the side wall 52 and the slat 9. The leveling layer 6 covers the flexible gasket 7. A water-stable layer 10 is provided on the slat 9. The pavement layer 3 covers the water-stable layer 10 and the leveling layer 6.

[0035] The joint structure between the large cantilever structure for driving and the roadbed makes the pavement continuous and seamless, and the driving feeling is good, there is no vehicle jumping phenomenon, and the overall landscape is good. The water-stabilizing layer 10 and the slab 9 serve as the stiffness transition zone, which can reduce the cracks caused by the uneven stiffness settlement of the large cantilever structure 5 and the roadbed soil 8, form a uniform transition, and enhance the integrity of the pavement structure.

[0036] An auxiliary structure 2 and an anti-collision structure 1 are provided at the end of the top plate 51. The anti-collision structure 1 can be an anti-collision plate, and the auxiliary structure 2 can be set as a flower bed.

[0037] The side wall 52 is a wall of uniform thickness, a wall of variable thickness, or a combination of a wall of uniform thickness and buttresses.

[0038] The top plate 51 is a plate of uniform thickness, a plate of variable thickness, a ribbed plate structure or a box-type structure.

[0039] The top plate 51 is a common reinforced concrete structure, a prestressed concrete structure or a steel-concrete composite structure.

[0040] The construction sequence of the joint structure between the crane cantilever structure and the roadbed is as follows:

[0041] like Figure 1 , place the buttress plate 9 horizontally on the corbel 53 and the roadbed soil 8;

[0042] like Figure 2 , laying flexible gaskets 7 and leveling layers 6, and pouring water-stabilizing layers 10;

[0043] like Figure 3 , lay pavement layer 3.

[0044] Example 2

[0045] In this embodiment, Figure 4 The leveling layer 6 is paved with steel mesh 11. The paving density of the steel mesh 11 in the area above the flexible gasket 7 is greater than the paving density of the steel mesh 11 in the area not above the flexible gasket 7. Increasing the density of the steel mesh 11 above the flexible gasket 7 can further reduce the crack width of the leveling layer 6 under dynamic loads. This density can significantly reduce cracks within the flexible gasket 7 and improve driving comfort. Other aspects are the same as those of Example 1.

[0046] Example 3

[0047] In this embodiment, Figure 4 After the pavement layer 3 is laid, a caulking joint 4 is formed in the pavement layer 3, located directly above the joint between the side wall 52 and the buttressing board 9. The caulking joint 4 is filled with a flexible waterproof material. Grooving the caulking joint 4 above the joint between the side wall 52 and the buttressing board 9 and filling it with the flexible waterproof material increases the surface ductility of the pavement layer 3, facilitates a uniform transition, and strengthens the integrity of the structure.

[0048] The flexible waterproof material is polyurethane.

[0049] The rest is the same as Example 1.

[0050] Example 1, Example 2 and Example 3 propose a joint structure between a large cantilever structure for driving and a roadbed. The joint structure between the large cantilever structure for driving and the roadbed has a continuous and seamless road surface, a good driving feel, no vehicle jumping phenomenon, a good overall landscape, a uniform transition, a strong integrity of the road surface structure, and low construction and operation and maintenance costs.

[0051] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A joint structure between a large cantilever structure of a traveling vehicle and a roadbed, characterized in that: The invention comprises a pavement layer (3), a large cantilever structure (5), a leveling layer (6), a flexible gasket (7), a roadbed soil (8) and a slat (9), wherein the large cantilever structure (5) comprises a side wall (52) and a top plate (51) and a corbel (53) on the side wall (52), the slat (9) is horizontally placed on the corbel (53) and the roadbed soil (8), and is in contact with the side wall (52), the flexible gasket (7) is located above the joint between the side wall (52) and the slat (9), the leveling layer (6) covers the flexible gasket (7), the slat (9) is provided with a water-stable layer (10), and the pavement layer (3) covers the water-stable layer (10) and the leveling layer (6); The leveling layer (6) is paved with a steel mesh (11), and the paving density of the steel mesh (11) located in the area above the flexible gasket (7) is greater than the paving density of the steel mesh (11) not located in the area above the flexible gasket (7); The paving layer (3) is provided with a caulking (4), and the caulking (4) is located just above the joint between the side wall (52) and the butt plate (9).

2. The joint structure between a large cantilever structure of a traveling vehicle and a roadbed according to claim 1, characterized in that: The caulking (4) is filled with a flexible waterproof material.

3. The joint structure between a large cantilever structure of a traveling vehicle and a roadbed according to claim 2, characterized in that: The flexible waterproof material is polyurethane.

4. The joint structure between a large cantilever structure of a traveling vehicle and a roadbed according to claim 1, characterized in that: The flexible gasket (7) is a rubber gasket.

5. The joint structure between a large cantilever structure of a traveling vehicle and a roadbed according to claim 1, characterized in that: The side wall (52) is a wall of uniform thickness, a wall of variable thickness, or a combination of a wall of uniform thickness and buttresses.

6. The joint structure between a large cantilever structure of a traveling vehicle and a roadbed according to claim 1, characterized in that: The top plate (51) is a plate of uniform thickness, a plate of variable thickness, a rib plate structure or a box structure.

7. The joint structure between a large cantilever structure of a traveling vehicle and a roadbed according to claim 1, characterized in that: The top plate (51) is a common reinforced concrete structure, a prestressed concrete structure or a steel-concrete combined structure.

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