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Prevention and treatment method of seasonal frozen soil area subgrade frost damage

A seasonal technology in permafrost regions, applied in the field of prevention and control of subgrade freezing damage in seasonal permafrost regions, can solve problems such as inability to effectively drain water and subgrade freezing damage, achieve simple embedding methods, prevent rainfall infiltration, and reduce excavation Effect

Inactive Publication Date: 2019-08-23
SOUTHEAST UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved: the present invention proposes countermeasures from the perspective of heat transfer for the existing traditional freezing damage prevention technology, which cannot effectively discharge the excess water that causes freezing damage in the subgrade, especially under unsaturated conditions, so it cannot be fundamentally solved Subgrade freezing damage caused by water migration

Method used

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  • Prevention and treatment method of seasonal frozen soil area subgrade frost damage

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Embodiment 1

[0024] A road project in Ulanhot City, Inner Mongolia was widened and reinforced with the help of the original expressway. The filling material was gravel excavated on site. In order to prevent frost heaving of the road, geosynthetic clay was embedded in the roadbed according to the method of the present invention. A moisture sensor was embedded in the roadbed to monitor the moisture change in the roadbed, and a comparison road section without geosynthetic clay liner was designed, and the data recorded by the moisture sensor of the two road sections were compared to verify the performance of the geosynthetic clay liner. Anti-freezing effect.

[0025] Specific steps are as follows:

[0026] Such as figure 1 As shown, carry out subgrade replacement and filling structural layer construction. After the construction is completed, lay the geosynthetic clay liner (1) on the upper part of the replacement treatment layer (2) at about 0.2m; Two layers of moisture sensors, 5 for each l...

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Abstract

The invention discloses a prevention and treatment method of seasonal frozen soil area subgrade frost damage. Geosynthetic clay liners are applied to a subgrade as waterproof materials; and specifically, the geosynthetic clay liners are correspondingly laid under a pavement structural layer and at the upper part of a subgrade slope and the upper part of a replacement treatment layer so that the geosynthetic clay liners surround the subgrade to stop water from entering into the subgrade. According to the prevention and treatment method of seasonal frozen soil area subgrade frost damage, by applying the geosynthetic clay liners to the subgrade, problems that shallow groundwater capillary water rises to cause intensifying of frost damage, rainfall permeates to cause water accumulation in subgrade soil and so on can be prevented; and the subgrade frost damage problem is fundamentally solved.

Description

technical field [0001] The invention belongs to the technical field of roadbed construction, and in particular relates to a method for preventing and treating freezing damage of roadbeds in seasonally frozen soil regions. Background technique [0002] The survey shows that the distribution area of ​​middle-depth seasonal frozen soil (>1m) in my country accounts for about 1 / 3 of the country's land area, and roadbed frost damage has long been an important problem that plagues road construction in northern and western my country, and water migration in roadbeds is the cause of roadbed freezing The most critical factor of inflation. Therefore, in highway projects in northern my country, a series of methods and measures will be adopted to reduce subgrade frost heave. The existing traditional frost damage prevention and control is based on the factors that cause freeze damage, mainly including replacement methods, chemical improvement methods, and heat preservation methods. , Im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/06
CPCE01C3/06Y02A30/60
Inventor 刘志彬刘锋张书建白梅雷松林张云龙
Owner SOUTHEAST UNIV
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