CN219508293U

CN219508293U - Roadbed structure in saline soil area

Info

Publication number: CN219508293U
Application number: CN202320181161.XU
Authority: CN
Inventors: 杨帅; 胡锋; 侯恩厚; 尹春元; 鲁凯; 刘春生; 刘伟; 段计伟; 盖忠
Original assignee: First Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Current assignee: First Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-08-11
Anticipated expiration: 2033-02-08

Abstract

The utility model discloses a roadbed structure in a saline soil area, and belongs to the field. The technical proposal is as follows: the utility model provides a saline soil area roadbed structure, including excavate subaerial, the permeable bearing layer and the water-blocking layer of backfilling in proper order, be located subaerial, cover the overburden on the water-blocking layer top surface, set up the anticorrosive coating at overburden top surface middle part, two side ditches that set up in the anticorrosive coating both sides, bury respectively on the overburden top surface correspondingly meet to and be located between two side ditches, cover the roadbed road surface of locating on the anticorrosive coating top surface, side ditch outside edge and overburden edge parallel and level. The beneficial effects of the utility model are as follows: the roadbed structure construction process in the saline soil area is environment-friendly, high in construction efficiency, construction period-saving, cost-saving and long in service life.

Description

Roadbed structure in saline soil area

Technical Field

The utility model relates to the technical field of feed feeding systems, in particular to a roadbed structure in a saline soil area.

Background

The roadbed is taken as an important component of the whole transportation system, directly bears long-term effects of upper structural load and static and dynamic load of the vehicle, and the quality of the roadbed directly influences the driving speed and driving safety. However, due to the high salt content of the saline soil, the saline soil may damage the road base, including roadbed damage caused by saline soil erosion, roadbed damage caused by swelling and expanding of the saline soil, roadbed slurry generation caused by frost heaving caused by saline soil roadbed filler, roadbed damage caused by slope destabilization caused by rain wash, and damage and influence on the road base caused by capillary water salt carrying rising.

At present, in saline soil engineering construction, a manner of transporting or purchasing high-quality roadbed filler from a stone factory in a long distance is generally adopted to improve the saline soil roadbed, but the problem that the roadbed engineering cost is too high, the construction period is too long and the like is caused by transporting or purchasing high-quality filler from a manufacturer in a long distance. If the curing agent is used for treating the road base, the conventional curing agent is not ideal in curing the salty soil because the salty soil contains various salts and has high salt content, and the conventional chemical curing agent (such as fine cement, epoxy resin, acrylamide, phenolic resin, polyurethane and the like) has high toxicity or danger to a certain extent.

How to solve the technical problems is the subject of the present utility model.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides the roadbed structure of the saline soil area, which has the advantages of green and environment-friendly construction process, high construction efficiency, construction period saving, cost saving and long service life.

In order to achieve the above object, the present utility model provides a roadbed structure in a saline soil area, which comprises a permeable bearing layer and a water-resistant layer excavated on the ground and backfilled in sequence, a covering layer positioned on the ground and covered on the top surface of the water-resistant layer, an anti-corrosion layer arranged in the middle of the top surface of the covering layer, two side ditches correspondingly connected to two sides of the anti-corrosion layer and respectively buried on the top surface of the covering layer, and a roadbed pavement positioned between the two side ditches and covered on the top surface of the anti-corrosion layer, wherein the outer edges of the side ditches are level with the edges of the covering layer; the bearing capacity and stability of the roadbed are ensured through the permeable bearing layer, and the groundwater is blocked through the water blocking layer; the salinization of the roadbed body can be prevented through the covering layer, and the service life of the roadbed is ensured; the erosion of the surface water to the road surface of the roadbed is blocked by the erosion prevention layer, so that the construction of the road surface of the roadbed is ensured; the side ditches are arranged, so that the ground drainage can be facilitated, the rising height of underground water and underground capillary water can be reduced, and the service life of the roadbed is further ensured.

A construction method of a roadbed structure in a saline soil area comprises the following steps:

step one: excavating saline land on the ground, and then burying the permeable bearing layer and the water-resistant layer in sequence, so that the top surface of the water-resistant layer is level with the ground;

step two: paving a covering layer on the top surface of the water-resistant layer;

step three: filling an anticorrosive layer in the middle of the top surface of the covering layer, and burying a side ditch at the top of the covering layer on two sides of the anticorrosive layer respectively, so that the outer side edge of the side ditch is level with the edge of the covering layer;

step four: and constructing a road bed pavement on the top surface of the corrosion-resistant layer.

The roadbed structure in the saline soil area has strong and stable bearing capacity, can effectively block the influence of the saline soil on the roadbed, has long service life, is environment-friendly in construction process, has high construction efficiency, saves construction period and cost, and is suitable for in-situ improvement of the saline soil.

The utility model is characterized in that the anti-corrosion layer is positioned at the lower end part of the side ditch, and the end surface of the anti-corrosion layer is higher than the bottom surface of the side ditch, so that the structure is reasonable.

The utility model is characterized in that the corrosion-resistant layer comprises a fine sand layer and a composite geomembrane covered on the top surface of the fine sand layer, and the material is convenient to obtain and the cost is low.

The utility model is also characterized in that the thickness of the fine sand layer is set to be 10-15cm.

The utility model is characterized in that the permeable bearing layer is made of broken stone, the materials are convenient to obtain, and the cost is low.

The utility model is characterized in that the thickness of the water permeable bearing layer is 50-70cm

The utility model is characterized in that the material of the water-resistant layer is cement soil, the materials are convenient to obtain, and the cost is low.

The utility model is also characterized in that the thickness of the water-resistant layer is set to be 50-70cm.

The utility model is characterized in that the material of the covering layer is plain soil, and preferably, in-situ saline soil for construction excavation is selected, so that the construction period is saved, and the environment is protected and economical.

The beneficial effects of the utility model are as follows: the utility model has strong and stable bearing capacity, can effectively block the influence of the saline soil on the roadbed, has long service life, green and environment-friendly construction process and high construction efficiency, saves the construction period and the cost, and is suitable for in-situ improvement of the saline soil.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Wherein, the reference numerals are as follows: 1. A water permeable bearing layer; 2. a water blocking layer; 3. a fine sand layer; 4. a composite geomembrane; 5. a cover layer; 6. road surface of the roadbed; 7. and a side ditch.

Detailed Description

In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.

Referring to fig. 1, the embodiment of the utility model provides a roadbed structure in a saline soil area, which comprises a permeable bearing layer 1 and a water-resistant layer 2 excavated on the ground and backfilled in sequence, a covering layer 5 positioned on the ground and covered on the top surface of the water-resistant layer 2, an anti-corrosion layer arranged in the middle of the top surface of the covering layer 5, two side ditches 7 correspondingly connected and arranged on two sides of the anti-corrosion layer and respectively buried on the top surface of the covering layer 5, and a roadbed pavement 6 positioned between the two side ditches 7 and covered on the top surface of the anti-corrosion layer, wherein the outer side edges of the side ditches 7 are flush with the edges of the covering layer 5; the bearing capacity and stability of the roadbed are ensured through the permeable bearing layer, and the groundwater is blocked through the water blocking layer 2; the salinization of the roadbed body can be prevented through the covering layer 5, and the service life of the roadbed is ensured; the erosion of the surface water to the road bed pavement 6 is blocked by the erosion prevention layer, so that the construction of the road bed pavement 6 is ensured; the side ditch 7 is arranged, so that the ground drainage can be facilitated, the rising height of underground water and underground capillary water can be reduced, and the service life of the roadbed is further ensured.

step one: excavating saline land on the ground, and then burying the permeable bearing layer 1 and the water-resistant layer 2 in sequence, so that the top surface of the water-resistant layer 2 is level with the ground; wherein the permeable bearing layer 1 is set to be broken stone with the thickness of 50cm, and the water-resistant layer 2 is set to be cement soil with the thickness of 50 cm;

step two: laying a covering layer 5 on the top surface of the water-resistant layer 2; the material of the covering layer 5 is plain soil, preferably, in-situ saline soil for construction excavation is selected, so that the construction period is saved, and the environment is protected and economical;

step three: an anticorrosive layer is filled in the middle of the top surface of the covering layer 5, and a side ditch 7 is buried at the top of the covering layer 5 at two sides of the anticorrosive layer respectively, so that the outer side edge of the side ditch 7 is level with the edge of the covering layer 5; the anti-corrosion layer is located at the lower end part of the side ditch 7, the end face of the anti-corrosion layer is higher than the bottom face of the side ditch 7, the structure is reasonable, the anti-corrosion layer comprises a fine sand layer 3 and a composite geomembrane 4 covered on the top face of the fine sand layer 3, the thickness of the fine sand layer 3 is 10cm, materials are conveniently obtained, and the manufacturing cost is low.

Step four: and constructing a road bed pavement 6 on the top surface of the corrosion-resistant layer.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. The utility model provides a saline soil area roadbed structure, its characterized in that, including excavation in subaerial, the permeable bearing layer (1) and the water-blocking layer (2) of backfilling in proper order, be located subaerial, cover in overburden (5) on water-blocking layer (2) top surface, set up the corrosion-resistant layer at overburden (5) top surface middle part, the corresponding setting that meets is in corrosion-resistant layer both sides, bury respectively in two side ditches (7) on overburden (5) top surface, and be located two between side ditches (7), cover in roadbed road surface (6) on corrosion-resistant layer top surface, side ditches (7) outside edge and overburden (5) edge parallel and level.

2. The roadbed structure of a saline soil zone according to claim 1, wherein the corrosion-resistant layer is positioned at the lower end part of the side ditch (7), and the end face of the corrosion-resistant layer is higher than the bottom face of the side ditch (7).

3. The roadbed structure of a saline soil zone according to claim 1 or 2, wherein the corrosion-resistant layer comprises a fine sand layer (3) and a composite geomembrane (4) coated on the top surface of the fine sand layer (3).

4. A foundation structure in a saline soil area according to claim 3, characterized in that the thickness of the fine sand layer (3) is set to 10-15cm.

5. The roadbed structure of a saline soil area according to claim 1, wherein the permeable bearing layer (1) is made of crushed stone.

6. The roadbed structure of a saline soil zone according to claim 1, wherein the thickness of the water permeable bearing layer (1) is set to 50-70cm.

7. The roadbed structure of a saline soil area according to claim 1, wherein the water-resistant layer (2) is made of cement soil.

8. The foundation structure of a salinized soil area according to claim 1, characterized in that the thickness of the water barrier layer (2) is set to 50-70cm.

9. The roadbed structure of a saline soil area according to claim 1, wherein the material of the cover layer (5) is plain soil.