Anti-settlement structure of roadbed bridge and culvert joint section

Abstract

The utility model discloses an anti-settlement structure of a roadbed bridge and culvert joint section, which belongs to the field of roadbed bridge and culvert, and comprises a bridge abutment and a roadbed, an abutment back backfilling area is arranged between the bridge abutment and the roadbed, layered steps are arranged on the roadbed side of the abutment back backfilling area, and a roadbed lane structure is arranged between the bridge abutment and the roadbed. The roadbed lane structure is located above the abutment back backfilling area. Compared with the prior art, the structure has the advantages that the water immersion phenomenon of materials of each layer in the abutment back backfilling area is avoided through the terrace surfaces of the layered steps and the bentonite waterproof blankets on the two sides of the river channel, and the bridge end transition slab above the bracket is connected to the side wall of the abutment through the slope support on one side of the roadbed lane supporting frame; and the stability of the bridge end transition slab cannot be influenced when the soil on the bottom surface of the lower layered step is soft.

Description

Technical Field

[0001] The utility model relates to the field of roadbed bridges and culverts, and specifically refers to an anti-settling structure of a roadbed bridge and culvert connection section. Background Art

[0002] Bridges have been an indispensable building since ancient times. They were created to shorten the walking distance between two locations. With the development of technology, the distance that bridges can span is getting farther and farther, and the weight that can be passed is getting heavier. Bridges and culverts generally connect the two sides of a river. Because the bridges and culverts are built above the river, the soil on both sides of the bridges and culverts becomes loose. After a long period of water infiltration, the ground on both sides will settle due to the loose soil, causing the bridge deck of the bridge and the roadbed to no longer be flat. When a vehicle travels through this location, the bridge head will jump out. Therefore, in the process of bridge construction, an anti-settlement structure of the roadbed bridge and culvert connection section is needed to improve or solve this problem.

[0003] The existing anti-settlement structure of the roadbed-bridge-culvert connection section is to set up a backfill area between the abutment and the roadbed, add anti-settlement materials in the backfill area, and the anti-settlement materials are layered through layered steps, so that the roadbed and lane structure above will not sink, ensuring that the roadbed and lane structure are in the same plane as the abutment and bridge deck.

[0004] Although the current anti-subsidence structure of the roadbed-bridge-culvert connection section can ensure that the bridge deck will not sink under normal circumstances, as the river water infiltrates for a long time, the gravel layer below will gradually become loose or even run away, eventually causing the area below the abutment backfill area to become hollow, thus affecting the stability of the support columns and the roadbed lane structure above the abutment backfill area will sink. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing platform backfill area cannot prevent river water from soaking the platform backfill area.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is: an anti-subsidence structure of a roadbed bridge-culvert connection section, comprising an abutment and a roadbed, a backfill area behind the abutment is provided between the abutment and the roadbed, a layered step is provided on the roadbed side of the backfill area behind the abutment, a roadbed lane structure is provided between the abutment and the roadbed, the roadbed lane structure is located above the backfill area behind the abutment, an abutment deck connecting to the roadbed lane structure is provided above the abutment, bentonite waterproof blankets are provided on the step surfaces of the layered steps in the backfill area behind the abutment and both sides of the river channel, and a plurality of roadbed lane support frames connected to the abutment are provided below the roadbed lane structure.

[0007] As an improvement, the platform backfill area includes a gravel soil layer, a foamed concrete layer and a water-stabilizing layer filled in sequence from the bottom of the layered steps, and an impermeable geotextile is provided between each layer of the platform backfill area.

[0008] As an improvement, the roadbed and lane structure includes a roadbed and bridge deck connected to the abutment and bridge deck, a bridgehead slab located below the roadbed and bridge deck, and a subbase layer for stabilizing the bridgehead slab. The side of the abutment is provided with a corbel corresponding to the bridgehead slab.

[0009] As an improvement, the roadbed lane support frame under the bridgehead slab is a Y-shaped support, and a pillow beam for sharing the bearing force of the bridgehead slab is provided under the bridgehead slab. The Y-shaped forks of the roadbed lane support frame are respectively located at both ends of the pillow beam, and the inclined support on one side of the roadbed lane support frame is connected between the abutment and the bridgehead slab.

[0010] As an improvement, the base of the roadbed lane support frame passes through the platform backfill area and is connected to the layered steps.

[0011] As an improvement, an expansion joint is provided between the abutment and the bridge deck and the roadbed and lane structure, and the abutment and the bridge deck are connected to the abutment through a bridge frame.

[0012] Compared with the prior art, the utility model has the following advantages: the bentonite waterproof blankets on the step surfaces of the layered steps and on both sides of the river channel ensure that the various layers of materials inside the backfill area of ​​the abutment will not be flooded; the bridgehead slab above the corbel is connected to the side wall of the abutment through an inclined bracket on one side of the roadbed lane support frame, which can ensure that when the soil on the bottom surface of the layered steps below is loose, the stability of the bridgehead slab will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a general structural sectional view of an anti-settlement structure of a roadbed bridge and culvert connection section.

[0014] Figure 2 The utility model discloses a roadbed lane structure diagram of an anti-settlement structure of a roadbed bridge-culvert connection section.

[0015] Figure 3 The utility model discloses a structural diagram of a platform backfill area of ​​an anti-settlement structure of a roadbed bridge and culvert connection section.

[0016] Figure 4 The utility model discloses a roadbed lane support frame structure diagram of an anti-settlement structure of a roadbed bridge-culvert connection section.

[0017] As shown in the figure: 1. Abutment; 2. Roadbed; 3. Backfill area behind the abutment; 31. Layered steps; 32. Gravel soil layer; 33. Foamed concrete layer; 34. Water-stabilizing layer; 35. Anti-permeability geotextile; 4. Roadbed and lane structure; 41. Roadbed and bridge deck; 42. Bridge head slab; 43. Subbase; 44. Corbel; 45. Pillar beam; 5. Abutment and bridge deck; 51. Bridge frame; 6. Bentonite waterproof blanket; 7. Roadbed and lane support frame; 8. Expansion joint. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] As the instruction manual Figure 1 , 2 As shown in Figure 3, an anti-settlement structure of a roadbed bridge-culvert connection section comprises an abutment 1 and a roadbed 2, a backfill area 3 is provided between the abutment 1 and the roadbed 2, a layered step 31 is provided on the roadbed 2 side of the backfill area 3, a roadbed lane structure 4 is provided between the abutment 1 and the roadbed 2, the roadbed lane structure 4 is located above the backfill area 3, a bridge abutment deck 5 connecting to the roadbed lane structure 4 is provided above the abutment 1, bentonite waterproof blankets 6 are provided on the step surface of the layered step 31 of the backfill area 3 and on both sides of the river channel, the backfill area 3 comprises a gravel soil layer 32, a foamed concrete layer 33 and a water-stabilizing layer 34 which are filled in sequence from the bottom of the layered step, and the backfill area 3, an impermeable geotextile 35 is arranged between each layer, the roadbed and lane structure 4 includes a roadbed and bridge deck 41 connected with the abutment and bridge deck 5, a bridgehead slab 42 located below the roadbed and bridge deck 41, and a subbase 43 for stabilizing the bridgehead slab 42. A corbel 44 corresponding to the bridgehead slab 42 is arranged on the side of the abutment 1, and an expansion joint 8 is arranged between the abutment and bridge deck 5 and the roadbed and lane structure 4. The abutment and bridge deck 5 is connected to the abutment 1 through a bridge frame 51. The water-stable layer 34 has high strength, rigidity and stability. For asphalt pavement, the water-stable layer is the main load-bearing layer of the entire road structure. The roadbed and lane structure 4 is placed above the water-stable layer 34 to ensure the stability of the roadbed and bridge deck 41.

[0020] As the instruction manual Figure 3 , 4As shown, a plurality of roadbed lane support frames 7 connected to the abutment 1 are provided below the roadbed lane structure 4, the roadbed lane support frame 7 below the bridgehead slab 42 is a Y-shaped frame, a pillow beam 45 for sharing the force of the bridgehead slab 42 is provided below the bridgehead slab 42, the Y-shaped forks of the roadbed lane support frame 7 are respectively located at both ends of the pillow beam 45, the inclined frame on one side of the roadbed lane support frame 7 is connected between the abutment 1 and the bridgehead slab 42, the base of the roadbed lane support frame 7 is connected to the layered step 31 through the abutment backfill area 3, and is fixed to the pillow beam 45 through the roadbed lane support frame 7, so that the force of the bridgehead slab 42 is evenly divided on each roadbed lane support frame 7.

[0021] During the specific implementation of the utility model, the backfill area 3 of the platform is excavated, and the ground of the backfill area 3 of the platform is compacted by a machine. A bentonite waterproof blanket 6 is laid on the layered steps 31 of the backfill area 3 of the platform. A gravel soil layer 32, a foamed concrete layer 33 and a water-stabilizing layer 34 are laid in sequence on each layered step 31. During the laying, each layer is separated by an impermeable geotextile 35, and each layer is compacted and flattened by a machine during the laying process. The bottom hole of the roadbed lane support frame 7 is punched on the layered steps 31 of the backfill area 3 of the platform, and the roadbed The bottom hole of the lane support frame 7 passes through the foamed concrete layer 33 and the water-stable layer 34, and a subbase layer 43 is laid on the top of the water-stable layer 34. After compaction, the bridgehead slab 42 and the roadbed bridge deck 41 are laid on the subbase layer 43 in sequence. The bridgehead slab 42 is fixed to the roadbed lane support frame 7 through a pillow beam 45, wherein one side of the bridgehead slab 42 is located on the corbel 44, and the abutment bridge deck 5 is aligned with the roadbed bridge deck 41, leaving an expansion joint 8 between the two, and bentonite waterproof blankets 6 are laid on both sides of the river channel to prevent the river water from soaking the land on both sides.

[0022] When in use, the corbels 45 of the abutment 1 and the bridgehead slab 42 are connected to the oblique bracket of the roadbed and lane support frame 7. When the soil below the gravel soil layer 32 is loose and no longer stable, the roadbed and lane support frame 7 at this end is fixed on the abutment 1, so the stability of the bridgehead slab 42 above the roadbed and lane support frame 7 can be ensured. Because the bentonite waterproof blanket 6 is laid on the step surface of the layered steps 31, it can be ensured that the subbase layer 43 of the bridgehead slab 42 will not be soaked by the moisture below, and the soil in the subbase layer 43 will not become loose, so that the bridgehead slab 42 and the roadbed and bridge deck 41 above will not sink.

[0023] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An anti-settlement structure for a roadbed bridge-culvert connection section, comprising an abutment (1) and a roadbed (2), wherein an abutment backfill area (3) is provided between the abutment (1) and the roadbed (2), wherein a layered step (31) is provided on the roadbed (2) side of the abutment backfill area (3), wherein a roadbed lane structure (4) is provided between the abutment (1) and the roadbed (2), wherein the roadbed lane structure (4) is located above the abutment backfill area (3), and an abutment deck (5) connected to the roadbed lane structure (4) is provided above the abutment (1), wherein the abutment deck (5) is provided above the abutment (1), wherein the abutment deck (5) is connected to the roadbed lane structure (4), and the abutment deck (5) is characterized in that: Bentonite waterproof blankets (6) are provided on the step surfaces of the layered steps (31) of the abutment backfill area (3) and on both sides of the river channel, and a plurality of roadbed and lane support frames (7) connected to the abutment (1) are provided below the roadbed and lane structure (4).

2. The anti-settlement structure of the roadbed bridge-culvert connection section according to claim 1 is characterized by: The platform backfill area (3) comprises a gravel soil layer (32), a foamed concrete layer (33) and a water-stabilizing layer (34) which are filled in sequence from the bottom surface of the layered steps, and an impermeable geotextile (35) is provided between each layer of the platform backfill area (3).

3. The anti-settlement structure of the roadbed bridge-culvert connection section according to claim 1 is characterized by: The roadbed and lane structure (4) comprises a roadbed and bridge deck (41) connected to the abutment and bridge deck (5), a bridgehead slab (42) located below the roadbed and bridge deck (41), and a subbase (43) for stabilizing the bridgehead slab (42), and a corbel (44) corresponding to the bridgehead slab (42) is provided on the side of the abutment (1).

4. The anti-settlement structure of the roadbed bridge-culvert connection section according to claim 3 is characterized by: The roadbed lane support frame (7) below the bridgehead slab (42) is a Y-shaped support, and a bolster (45) for sharing the bearing force of the bridgehead slab (42) is provided below the bridgehead slab (42), and the Y-shaped forks of the roadbed lane support frame (7) are respectively located at both ends of the bolster (45), and the inclined support on one side of the roadbed lane support frame (7) is connected between the abutment (1) and the bridgehead slab (42).

5. The anti-settlement structure of the roadbed bridge-culvert connection section according to claim 3 is characterized by: The base of the roadbed lane support frame (7) passes through the platform backfill area (3) and is connected to the layered steps (31).

6. The anti-settlement structure of the roadbed bridge-culvert connection section according to claim 1 is characterized by: An expansion joint (8) is provided between the abutment bridge deck (5) and the roadbed lane structure (4), and the abutment bridge deck (5) is connected to the abutment (1) via a bridge frame (51).

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