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Insulation construction method for frozen-earth roadbed

A construction method and technology of frozen soil, which is applied to roads, roads, buildings, etc., can solve problems such as unstable construction subgrades, achieve the effects of shortening the construction period, protecting the ecological environment, and reducing the thickness of the filling

Inactive Publication Date: 2012-08-08
TIANJIN 20 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a thermal insulation construction method for frozen soil subgrades, which overcomes the problem of unstable subgrades during road construction in permafrost sections in the prior art

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  • Insulation construction method for frozen-earth roadbed
  • Insulation construction method for frozen-earth roadbed

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Construction principles:

[0029] The "Technical Specifications for Highway Bridge and Culvert Construction", "Highway Quality Inspection and Evaluation Standards" and various provisions of the design documents are implemented for the construction technology of thermal insulation construction of frozen soil subgrade.

[0030] First of all, based on the technical specifications and design documents, on the basis of fully combining the actual situation, in accordance with the guarantee of quality, taking into account the saving of funds and the construction period, a scientific construction plan is formulated, and attention is paid to ensuring the safety of project construction.

[0031] Fully prepare for construction before construction: collect meteorological information, geological survey report data and roadbed design data, d...

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Abstract

The invention discloses an insulation construction method for a frozen-earth roadbed, which comprises the steps of: (1) carrying out excavating and replacing-filling construction; (2) laying a sand mattress layer, an insulation board, a geotextile and a geogrid; (3) burying temperature sensors; and (4) performing regular temperature observation. The insulation construction method for the frozen-earth roadbed relates to a construction method of setting a thermal insulation layer in a permafrost section, which is capable of controlling disturbance on a permafrost layer effectively, and maintaining property stability of the permafrost layer, thereby enhancing the overall stability of a roadbed, preventing the roadbed in the permafrost section from damages of subsidence, frost heave, pavement cracking, collapse, and the like, reducing replacing-filling thickness, saving construction cost, and shorting construction period under the same conditions.

Description

technical field [0001] The invention relates to a roadbed construction method, in particular to a frozen soil roadbed construction method. Background technique [0002] At present, in China's Qinghai-Tibet Plateau, Northeast Daxingan Mountains, Xiaoxing'an Mountains, Tianshan Mountains, Altai Mountains and other regions, because they are located in severe cold regions, they have formed a special soil quality - permafrost. The permafrost is generally divided into two layers: the upper part is summer The active layer (seasonal frozen soil) that thaws in winter, and the lower part is the perennial frozen layer that does not thaw all year round. [0003] Road construction in cold plateau areas often encounters permafrost sections. How to ensure that the permafrost at the bottom of the road subgrade is not destroyed (prevent melting), and how to ensure the stability of the road subgrade has been a problem that road construction needs to solve for a long time. Contents of the i...

Claims

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Application Information

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IPC IPC(8): E01C3/06
Inventor 刘宝生韩香宏韩国东贾威
Owner TIANJIN 20 CONSTR