CN221029348U

CN221029348U - High liquid limit soil roadbed structure

Info

Publication number: CN221029348U
Application number: CN202322769786.0U
Authority: CN
Inventors: 斯伟杰; 刘旭; 杨志远; 潘俊涛; 眭建文; 陈东毅; 鲍淑静; 殷杰
Original assignee: Zhejiang Zicheng Road And Bridge Engineering Design Consulting Co ltd
Current assignee: Zhejiang Zicheng Road And Bridge Engineering Design Consulting Co ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2024-05-28
Anticipated expiration: 2033-10-13

Abstract

The utility model discloses a high liquid limit soil roadbed structure, which relates to the technical field of roadbed structures, and comprises a roadbed body, wherein a first geogrid layer is paved on the upper surface of a first filling layer, a first protection layer is paved on the upper surface of the first geogrid layer, a broken stone layer is paved on the upper surface of the first protection layer, a second filling layer is paved on the upper surface of the broken stone layer, after dredging a substrate, a gravel cushion layer is paved on the substrate, and a first geogrid layer, a first protection layer, a broken stone layer and a second geogrid layer are additionally arranged between the first filling layer and the second filling layer, so that the filled first filling layer and the second filling layer are respectively interlocked with the first geogrid layer and the second geogrid layer, a relatively stable plane is formed, the overall stability of the roadbed is improved, and the probability of uneven settlement of the roadbed in a rainy season is reduced.

Description

High liquid limit soil roadbed structure

Technical Field

The utility model relates to the technical field of roadbed structures, in particular to a high liquid limit soil roadbed structure.

Background

The roadbed is a foundation of a track or a road surface, is a geotechnical structure formed by excavation or filling, has the main functions of providing necessary conditions for track or road surface paving and train or driving operation, bearing static load and dynamic load of track and rolling stock or road surface and traffic load, simultaneously transmitting and diffusing the load to the deep part of the foundation, and has the advantages of high water content, light volume weight, poor stability and low strength, the compaction degree of the roadbed according to the conventional construction process can not meet the design specification, the high liquid limit soil generally refers to fine soil with the liquid limit of more than 50 percent, the high liquid limit soil can not be directly used as roadbed filling, but if the high liquid limit soil is directly used as a abandon part, the roadbed can cause serious water and soil loss and bad environment damage, and the roadbed is easy to migrate and subside unevenly in the high liquid limit soil due to the influence of external climate in rainy seasons.

Disclosure of utility model

(One) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a high liquid limit soil roadbed structure, which solves the technical problem that the roadbed is easily influenced by external climate in rainy seasons and the humidity migrates in the high liquid limit soil to generate uneven settlement.

(II) technical scheme

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

The high liquid limit soil roadbed structure comprises a roadbed body, wherein a substrate is paved at the bottom of the roadbed body, a gravel cushion layer is paved on the upper surface of the substrate, a first filling layer is paved on the upper surface of the gravel cushion layer, a first geogrid layer is paved on the upper surface of the first filling layer, a first protection layer is paved on the upper surface of the first geogrid layer, a gravel layer is paved on the upper surface of the first protection layer, and a second filling layer is paved on the upper surface of the gravel layer;

The upper surface of the second filling layer is paved with a second geogrid layer, the upper surface of the second geogrid layer is provided with a top cover layer, and the first filling layer and the second filling layer are both high-liquid limit soil layers.

The first protective layer is coarse sand;

wherein the first protective layer has a thickness of five centimeters.

The upper surface of the second geogrid layer is paved with a non-filling layer, and the upper surface of the non-filling layer is provided with a protective layer;

Wherein, the capping layer is laid on the upper surface of the protective layer, and the protective layer is made of waterproof geotechnical cloth.

A sand stone cushion layer is paved on the upper surface of the non-filling layer;

wherein, the inoxidizing coating sets up the upper surface at sand and stone bed course.

Preferably: a second protective layer is laid on the upper surface of the sand stone cushion layer, and a third geogrid layer is laid on the upper surface of the second protective layer;

Wherein, the inoxidizing coating is laid on the upper surface of third geogrid layer.

Preferably: the second protective layer is coarse sand;

wherein the thickness of the second protective layer is five centimeters.

(III) beneficial effects

1. Through setting up first geogrid layer, cooperation gravel layer, to the basement behind dredging, spread the gravel bed on to the basement, added first geogrid layer, first protective layer, gravel layer and second geogrid layer between first filling layer and second filling layer, make first filling layer and second filling layer interlock mutually with first geogrid layer and second geogrid layer respectively and, make it form relatively stable plane, improve its overall stability, reduce the non-uniform probability of roadbed settlement in rainy season.

2. Through the inoxidizing coating that sets up, cooperation third geogrid layer, laid non-filling layer, sand and stone bed course, second protective layer and third geogrid layer on the upper surface on second geogrid layer, increased the bearing capacity at road bed top, the inoxidizing coating that the upper surface on third geogrid layer was laid simultaneously is made by waterproof geotechnique's cloth, can effectively keep apart filling layer and external, reduces the influence of humidity to filling layer.

Drawings

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

FIG. 1 is a block diagram of the present utility model;

FIG. 2 is a cross-sectional view of the subgrade body of FIG. 1 in accordance with the present utility model;

FIG. 3 is a block diagram of the present utility model;

fig. 4 is a structural diagram of the present utility model.

Legend description: 1. a roadbed body; 2. a substrate; 3. a gravel pack; 4. a first filling layer; 5. a first geogrid layer; 6. a first protective layer; 7. a crushed stone layer; 8. a second filling layer; 9. a second geogrid layer; 10. a capping layer; 11. a non-filling layer; 12. a protective layer; 13. a sand and stone bedding; 14. a second protective layer; 15. and a third geogrid layer.

Detailed Description

The embodiment of the application effectively solves the technical problem that the roadbed is easily affected by external climate in rainy season and the humidity migrates in the high liquid limit soil to generate uneven settlement by providing the high liquid limit soil roadbed structure.

Examples

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the technical scheme in the embodiment of the application is to effectively solve the technical problem that in a rainy season, a road base is easily influenced by external climate and humidity and migrates in high liquid limit soil to generate uneven settlement, and the general thought is as follows:

Aiming at the problems existing in the prior art, the utility model provides a high liquid limit soil roadbed structure, which comprises a roadbed body 1, wherein a substrate 2 is paved at the bottom of the roadbed body 1, a gravel layer 3 is paved on the upper surface of the substrate 2, a first filling layer 4 is paved on the upper surface of the gravel layer 3, a first geogrid layer 5 is paved on the upper surface of the first filling layer 4, a first protection layer 6 is paved on the upper surface of the first geogrid layer 5, a gravel layer 7 is paved on the upper surface of the first protection layer 6, and a second filling layer 8 is paved on the upper surface of the gravel layer 7;

The second geogrid layer 9 is laid on the upper surface of the second filling layer 8, and a capping layer 10 is arranged on the upper surface of the second geogrid layer 9, wherein the first filling layer 4 and the second filling layer 8 are both high-liquid limit soil layers.

Through setting up first geogrid layer 5, cooperation rubble layer 7, to the substrate 2 dredging the back, spread to the substrate 2 on gravel bed course 3, added first geogrid layer 5 between first filling layer 4 and second filling layer 8, first protective layer 6, rubble layer 7 and second geogrid layer 9, make first filling layer 4 that fills and second filling layer 8 interlock mutually with first geogrid layer 5 and second geogrid layer 9 respectively and, make it form relatively stable plane, improve its overall stability, reduce the non-uniform probability of roadbed settlement in rainy season.

The first protective layer 6 is coarse sand;

wherein, the thickness of the first protection layer 6 is five centimeters, and the first geogrid layer 5 is prevented from being in direct contact with the crushed stone layer 7.

The upper surface of the second geogrid layer 9 is paved with a non-filling layer 11, and the upper surface of the non-filling layer 11 is provided with a protective layer 12;

The capping layer 10 is paved on the upper surface of the protective layer 12, the protective layer 12 is made of waterproof geotextile, and the protective layer 12 paved on the upper surface of the third geogrid layer 15 is made of waterproof geotextile, so that the filling layer can be effectively isolated from the outside, and the influence of humidity on the filling layer is reduced.

The upper surface of the non-filling layer 11 is paved with a sand and stone cushion layer 13;

Wherein, the protective layer 12 is arranged on the upper surface of the sand and stone bedding layer 13 to increase the stability of the non-filling layer 11.

The second protective layer 14 is laid on the upper surface of the sand and stone cushion 13, and the third geogrid layer 15 is laid on the upper surface of the second protective layer 14;

Wherein the protective layer 12 is laid on the upper surface of the third geogrid layer 15, so that the sand and stone bedding layer 13, the non-filling layer 11 and the second protective layer 14 are interlocked and form a stable plane.

The second protective layer 14 is coarse sand;

The second protective layer 14 has a thickness of five cm, avoiding direct contact between the sand and stone bedding layer 13 and the third geogrid layer 15.

Through the inoxidizing coating 12 that sets up, cooperation third geogrid layer 15, laid non-filling layer 11, sand stone bed course 13, second protective layer 14 and third geogrid layer 15 on the upper surface of second geogrid layer 9, increased the bearing capacity at road bed top, inoxidizing coating 12 that the upper surface of third geogrid layer 15 was laid simultaneously is made by waterproof geotechnique's cloth, can effectively keep apart filling layer and external, reduces the influence of humidity to the filling layer.

Working principle:

Through setting up first geogrid layer 5, cooperate rubble layer 7, behind dredging substrate 2, gravel bed 3 has been spread on to substrate 2, first geogrid layer 5 has been increased between first filling layer 4 and second filling layer 8, first protective layer 6, rubble layer 7 and second geogrid layer 9, make first filling layer 4 that fills and second filling layer 8 interlock mutually with first geogrid layer 5 and second geogrid layer 9 respectively, make it form relatively stable plane, improve its overall stability, reduce the probability that the road bed subsides unevenly in the rainy season, non-filling layer 11 has been laid at the upper surface of second geogrid layer 9, sand stone bed layer 13, second protective layer 14 and third geogrid layer 15, increase the bearing capacity at road bed top, the inoxidizing coating 12 that the upper surface of third geogrid layer 15 was laid is made by waterproof geotechnique cloth simultaneously, can effectively keep apart filling layer and external world, reduce the influence of humidity to the filling layer.

Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. The utility model provides a high liquid limit soil roadbed structure, includes roadbed body (1), basement (2) have been laid to the bottom of roadbed body (1), and gravel bed (3) have been laid to the upper surface of basement (2), a serial communication port, first filling layer (4) have been laid to the upper surface of gravel bed (3), and first geogrid layer (5) have been laid to the upper surface of first filling layer (4), and first protective layer (6) have been laid to the upper surface of first geogrid layer (5), and gravel layer (7) have been laid to the upper surface of first protective layer (6), and second filling layer (8) have been laid to the upper surface of gravel layer (7);

The upper surface of the second filling layer (8) is paved with a second geogrid layer (9), the upper surface of the second geogrid layer (9) is provided with a top cover layer (10), and the first filling layer (4) and the second filling layer (8) are both high-liquid limit soil layers.

2. A high liquid limit soil subgrade structure according to claim 1, wherein: the first protective layer (6) is coarse sand;

wherein the thickness of the first protective layer (6) is five centimeters.

3. A high liquid limit soil subgrade structure according to claim 1, wherein: the upper surface of the second geogrid layer (9) is paved with a non-filling layer (11), and the upper surface of the non-filling layer (11) is provided with a protective layer (12);

wherein, the capping layer (10) is paved on the upper surface of the protective layer (12), and the protective layer (12) is made of waterproof geotextile.

4. A high liquid limit soil subgrade structure according to claim 3, wherein: the upper surface of the non-filling layer (11) is paved with a sand and stone cushion layer (13);

Wherein, the protective layer (12) is arranged on the upper surface of the sand and stone cushion layer (13).

5. The high liquid limit soil subgrade structure according to claim 4, wherein: a second protective layer (14) is laid on the upper surface of the sand and stone cushion layer (13), and a third geogrid layer (15) is laid on the upper surface of the second protective layer (14);

Wherein the protective layer (12) is paved on the upper surface of the third geogrid layer (15).

6. The high liquid limit soil subgrade structure according to claim 5, wherein: the second protective layer (14) is coarse sand;

wherein the second protective layer (14) has a thickness of five centimeters.