Settling prevention structure for sewer well and surrounding road

Abstract

The utility model discloses an anti-settling structure for a sewer well and a surrounding road. The anti-settling structure comprises the sewer well, a well periphery backfilling structure and a pavement structure, the sewer well comprises a well body, a well ring is fixed to the upper end of the well body, a well lid support is arranged on the well ring, and a well lid is installed on the well lid support. The well periphery backfilling structure is arranged on the periphery of the sewer well and comprises a cement soil backfilling layer and a concrete backfilling layer which are sequentially arranged in a stacked mode from bottom to top. The pavement structure is arranged on the periphery of the sewer well, partially surrounds the well periphery backfill structure and comprises a base layer and an asphalt concrete layer which are sequentially stacked from bottom to top. The cement soil and the concrete are used for comprehensively compacting and tightly wrapping the sewer well, so that the sewer well can be supported and prevented from being damaged or collapsed under the compression of external force, and an isolating layer can be formed between the sewer well and the road subgrade, so that water is prevented from permeating into the road subgrade to a certain extent; therefore, the probability of cavities and differential settlement caused by erosion of the surrounding road genes by the water body is reduced.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of road engineering, in particular to an anti-settling structure for a sewer well and surrounding roads. Background Art

[0002] In road engineering, the problem of road subsidence near manhole covers has always been difficult to solve. In the prior art, due to the long-term erosion of the manhole body by water, the manhole cover and the surrounding road surface are prone to cavitation and uneven subsidence, which seriously affects the flatness of the road surface and driving comfort, and may even cause traffic accidents, posing a serious threat to the travel safety of citizens. Therefore, it is necessary to optimize the structure of the manhole and the surrounding roads to reduce the occurrence of uneven subsidence. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a structure for preventing subsidence of a sewer well and surrounding roads.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A structure for preventing subsidence of a sewer and surrounding roads, comprising a sewer, a backfill structure around the sewer and a pavement structure; the sewer comprises a sewer body, a sewer ring is fixed at the upper end of the sewer body, a sewer cover support is arranged on the sewer ring, and a sewer cover is installed on the sewer cover support; the backfill structure around the sewer is arranged at the periphery of the sewer, and comprises a cement soil backfill layer and a concrete backfill layer stacked in sequence from bottom to top; the pavement structure is arranged at the periphery of the sewer and partially surrounds the backfill structure around the sewer, and comprises a base layer and an asphalt concrete layer stacked in sequence from bottom to top.

[0006] As a further improvement of the above technical solution:

[0007] The well body is arranged as a brick structure or a concrete cast structure; when the well body adopts a brick structure, a plastering layer is arranged on the inner wall thereof.

[0008] The manhole ring is configured as a reinforced concrete structure, and the manhole ring and the manhole cover support are integrally cast.

[0009] A cement mortar layer is arranged between the well body and the well ring to fill the gap between them.

[0010] The width L1 between the outer edge of the cement soil backfill layer and the well body is 0.5-0.8m.

[0011] The width L2 between the outer edge of the concrete backfill layer and the well body is 0.5-0.8m.

[0012] The base layer is arranged at the periphery of the well backfill structure, and comprises a lower base layer and an upper base layer which are stacked in sequence from bottom to top.

[0013] The asphalt concrete layer is arranged at the periphery of the sewer well, and comprises a coarse-grained asphalt concrete layer, a medium-grained asphalt concrete layer and a fine-grained asphalt concrete layer which are stacked in sequence from bottom to top.

[0014] The anti-settling structure also includes a multi-layer spider-web structure steel mesh laid on the periphery of the sewer well, and the steel mesh is built into the asphalt concrete layer.

[0015] Steel fibers are mixed into the asphalt concrete layer within the area surrounded by the steel mesh.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] A backfill structure is set up around the sewer well. Specifically, the backfill structure is divided into a cement soil backfill layer at the lower layer and a concrete backfill layer at the upper layer. The cement soil and concrete fully compact and tightly wrap the sewer well, which not only provides support for the sewer well to prevent it from being damaged or collapsed under external pressure, but also forms an isolation layer between the sewer well and the road subgrade, which to a certain extent hinders the infiltration of water into the road subgrade, thereby reducing the probability of voids and uneven settlement of the surrounding road subgrade due to water erosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view schematic diagram of the anti-settlement structure of the sewer well and surrounding roads;

[0019] Figure 2 It is a top-down schematic diagram of the anti-subsidence structure of the sewer well and surrounding roads.

[0020] The numbers in the figure represent: 1. sewer; 11. well body; 12. well ring; 13. well cover support; 14. well cover; 15. cement mortar layer; 2. well backfill structure; 21. cement soil backfill layer; 22. concrete backfill layer; 23. plain concrete ring; 3. pavement structure; 31. base layer; 311. lower base layer; 312. upper base layer; 32. asphalt concrete layer; 321. coarse-grained asphalt concrete layer; 322. medium-grained asphalt concrete layer; 323. fine-grained asphalt concrete layer; 4. steel mesh. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Example

[0023] like Figure 1 and Figure 2As shown, the anti-subsidence structure of the sewer well and the surrounding roads of this embodiment includes a sewer well 1, a backfill structure 2 around the well and a pavement structure 3; the sewer well 1 includes a well body 11, a well ring 12 is fixed to the upper end of the well body 11, a well cover support 13 is arranged on the well ring 12, and a manhole cover 14 is installed on the manhole cover support 13; the backfill structure 2 around the well is arranged on the periphery of the sewer well 1, and includes a cement soil backfill layer 21 and a concrete backfill layer 22 which are stacked in sequence from bottom to top; the pavement structure 3 is arranged on the periphery of the sewer well 1 and partially surrounds the backfill structure 2 around the well, and includes a base layer 31 and an asphalt concrete layer 32 which are stacked in sequence from bottom to top. A well-surrounding backfill structure 2 is arranged around the sewer well 1. Specifically, the well-surrounding backfill structure 2 is divided into a cement soil backfill layer 21 located at the lower layer and a concrete backfill layer 22 located at the upper layer. The cement soil and concrete fully compact and tightly wrap the sewer well 1, which can not only provide support for the sewer well 1 to prevent it from being damaged or collapsed under the pressure of external forces, but also form an isolation layer between the sewer well 1 and the roadbed, which to a certain extent hinders the infiltration of water into the roadbed, thereby reducing the probability of the surrounding roadbed being eroded by water to produce cavities and uneven settlement.

[0024] In this embodiment, the well body 11 is set as a brick structure or a concrete casting structure; when the well body 11 is a brick structure, a plastering layer is set on its inner wall. The concrete casting structure has good waterproof performance, and the well body 11 with a brick structure has good economic efficiency. By setting a 20mm thick plastering layer on the inner wall of the well body 11 with a brick structure, the waterproof performance of the well body 11 can be further enhanced, thereby reducing the probability of water leakage in the well. Further, the well ring 12 is set as a reinforced concrete structure, and the well ring 12 and the well cover support 13 are integrally cast. The well ring 12 and the well cover support 13 are connected as a whole in the form of integral casting, which can effectively seal the gap between the two, thereby reducing the probability of water diffusing into the road along the gap to a certain extent. Furthermore, a cement mortar layer 15 for filling the gap between the well body 11 and the well ring 12 is set. By setting a cement mortar layer with a C30 mark, the gap between the two can be effectively sealed, thereby reducing the probability of water diffusing into the road along the gap to a certain extent.

[0025] In this embodiment, the width L1 of the outer edge of the cement soil backfill layer 21 from the well body 11 is 0.5-0.8m, and its density is not less than the requirement of the roadbed at the same elevation. The width L2 of the outer edge of the concrete backfill layer 22 from the well body 11 is 0.5-0.8m, and it uses C20-grade plain concrete or reinforced concrete with built-in structural φ8@150 reinforcement. By setting the thickness of the cement soil backfill layer 21 and the thickness of the concrete backfill layer 22 to 0.5-0.8m, the well surrounding backfill structure 2 can fully compact and tightly wrap the sewer 1, which can not only provide support for the sewer 1 to prevent it from being damaged or collapsed under external pressure, but also form an isolation layer between the sewer 1 and the roadbed, which to a certain extent hinders the water body from penetrating into the roadbed, thereby reducing the probability of the surrounding roadbed being eroded by water to produce cavities and uneven settlement. Moreover, since the aggregate particles in the asphalt concrete layer 32 are relatively large, it is difficult to densely fill the angle formed by the well ring 12 and the base layer 31 . Therefore, a plain concrete ring 23 is poured in the dead angle area around the well ring 12 . The cross section of the plain concrete ring 23 is triangular.

[0026] In this embodiment, the base layer 31 is arranged at the periphery of the well backfill structure 2, and includes a lower base layer 311 and an upper base layer 312 stacked sequentially from bottom to top. The asphalt concrete layer 32 is arranged at the periphery of the sewer well 1, and includes a coarse-grained asphalt concrete layer 321, a medium-grained asphalt concrete layer 322, and a fine-grained asphalt concrete layer 323 stacked sequentially from bottom to top. Specifically, the thickness of the lower base layer 311 and the upper base layer 312 are both set to 200 mm, and the top surface of the upper base layer 311 is flush with the top surface of the concrete backfill layer 22. The thickness of the coarse-grained asphalt concrete layer 321, the medium-grained asphalt concrete layer 322, and the fine-grained asphalt concrete layer 323 are set to 70 mm, 50 mm, and 40 mm, respectively.

[0027] In this embodiment, the anti-settling structure also includes a multi-layer spider web-like structure steel mesh 4 laid on the periphery of the sewer 1, and the steel mesh 4 is built into the asphalt concrete layer 32. By laying the steel mesh 4 on the periphery of the sewer 1, the steel mesh 4 can be used to transfer the external load outward, thereby greatly improving the compressive resistance of the road surface, and effectively avoiding the settlement of the road surface caused by external forces such as vehicle rolling. Steel fibers are added to the asphalt concrete layer 32 in the area surrounded by the steel mesh 4. By adding steel fibers to the asphalt concrete layer 32, the road surface is not only wear-resistant and compression-resistant, but also can significantly improve the toughness and service life of the road surface, ensuring the long-term flatness and stability of the road surface.

[0028] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A sewer well and surrounding road anti-settlement structure, comprising a sewer well (1), a well perimeter backfill structure (2) and a road surface structure (3), characterized in that: The sewer well (1) comprises a well body (11), a well ring (12) is fixed at the upper end of the well body (11), a well cover support (13) is arranged on the well ring (12), and a well cover (14) is installed on the well cover support (13); The well perimeter backfill structure (2) is arranged at the periphery of the sewer well (1), and comprises a cement soil backfill layer (21) and a concrete backfill layer (22) stacked in sequence from bottom to top; The pavement structure (3) is arranged outside the sewer well (1) and partially surrounds the well perimeter backfill structure (2), and comprises a base layer (31) and an asphalt concrete layer (32) which are stacked in sequence from bottom to top.

2. The anti-settling structure for a sewer well and surrounding roads according to claim 1, characterized in that: The well body (11) is configured as a brickwork structure or a concrete pouring structure; when the well body (11) is configured as a brickwork structure, a plastering layer is provided on its inner wall.

3. The anti-settling structure for a sewer well and surrounding roads according to claim 1, characterized in that: The manhole ring (12) is configured as a reinforced concrete structure, and the manhole ring (12) and the manhole cover support (13) are integrally cast.

4. The anti-settling structure for a sewer well and surrounding roads according to claim 1, characterized in that: A cement mortar layer (15) is provided between the well body (11) and the well ring (12) to fill the gap between the two.

5. The anti-settling structure for a sewer well and surrounding roads according to claim 1, characterized in that: The width L1 between the outer edge of the cement soil backfill layer (21) and the well body (11) is 0.5-0.8 m.

6. The anti-settling structure for a sewer well and surrounding roads according to claim 1, characterized in that: The width L2 between the outer edge of the concrete backfill layer (22) and the well body (11) is 0.5-0.8 m.

7. The anti-settling structure for a sewer well and surrounding roads according to claim 1, characterized in that: The base layer (31) is arranged at the periphery of the well backfill structure (2), and comprises a lower base layer (311) and an upper base layer (312) which are stacked in sequence from bottom to top.

8. The anti-settling structure for a sewer well and surrounding roads according to claim 1, characterized in that: The asphalt concrete layer (32) is arranged at the periphery of the sewer well (1), and comprises a coarse-grained asphalt concrete layer (321), a medium-grained asphalt concrete layer (322), and a fine-grained asphalt concrete layer (323) which are stacked in sequence from bottom to top.

9. The anti-settling structure for a sewer well and surrounding roads according to any one of claims 1 to 8, characterized in that: The anti-settling structure also includes a multi-layer spider-web-like structured steel mesh (4) laid on the periphery of the sewer well (1), and the steel mesh (4) is built into the asphalt concrete layer (32).

10. The anti-settling structure for a sewer well and surrounding roads according to claim 9, characterized in that: Steel fibers are mixed into the asphalt concrete layer (32) within the area surrounded by the steel mesh (4).

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