A structure type of expansive soil composite subgrade and its construction method

A technology of composite subgrade and structural type, applied in roads, roads, buildings, etc., to achieve the effect of making up for chemical improvement of polluted environment, ensuring long-term performance stability, and improving stability

Active Publication Date: 2022-04-01
RES INST OF HIGHWAY MINIST OF TRANSPORT
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Problems solved by technology

[0004] The present invention aims to solve the problem of rational utilization of expansive soil as roadbed filler, considering the influence of the atmospheric environment and the depth of significant influence, and based on the basic principle of moisture retention and anti-seepage, a composite roadbed structure type of reinforced expansive soil and geocell ecological protection is proposed and its construction method

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  • A structure type of expansive soil composite subgrade and its construction method
  • A structure type of expansive soil composite subgrade and its construction method
  • A structure type of expansive soil composite subgrade and its construction method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, and the embodiments of the present invention are not limited thereto.

[0039] figure 1 Shown is a structural type of expansive soil composite subgrade, including bottom isolation layer 2, expansive soil core filling area 3, edge reinforcement and anti-seepage area 4, geocell protection area 5, upper embankment 6, road bed 7, Pavement structure layer 8.

[0040] The bottom isolation layer 2 is located above the foundation 1, and is used to prevent the water table from rising or capillary water from migrating to the expansive soil core area 3; the expansive soil core area 3 is located above the bottom isolation layer 2; the upper embankment 6 is located on the expansive soil Above the core filling area 3; the road bed 7 is located above the upper embank...

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Abstract

The invention discloses an expansive soil composite roadbed structure type and a construction method thereof. The expansive soil composite roadbed structure type includes a bottom isolation layer, an expansive soil core filling area, side reinforcement and anti-seepage areas, a geocell protection area, and an upper road Embankment, road bed, pavement structure layer. The expansive soil composite roadbed of the present invention can form a closed water-proof or water-blocking system, avoid external moisture from infiltrating the expansive soil core-filling area, ensure stable humidity in the expansive soil core-filling area, and ensure long-term performance stability of the expansive soil roadbed. At the same time, the The roadbed structure type can not only maximize the use of expansive soil along the line as roadbed filler, but also make up for the disadvantages of no available edge-wrapped soil source and chemical improvement to pollute the environment, which is in line with the concept of ecological and environmental protection.

Description

technical field [0001] The invention relates to an expansive soil composite roadbed structure type and a construction method thereof, belonging to the field of highway roadbeds. Background technique [0002] Expansive soil is a special soil rich in strong hydrophilic clay minerals, which swells when exposed to water, shrinks when dehydrated, and has poor engineering properties. It is widely distributed in my country. In the initial stage of high-grade highway construction in my country, expansive soil is often chemically modified by mixing cement, lime, and slag mixture. This requires high construction machinery and technology, poor environmental protection, and causes a substantial increase in engineering costs. In the mid-to-late 1990s, based on the basic principles of moisture retention and anti-seepage, physical improvement methods such as non-expansive clay / gravel soil covering (including interlayer), geogrid / geogrid edge reinforcement, and geotextile reinforcement bega...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/00E01C3/04E01C3/06
CPCE01C3/00E01C3/04E01C3/06Y02A30/60
Inventor 宋常军吴立坚卞晓琳李鹏李生汀韩志杰
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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