Reinforced hot melt pile/reinforced gravel pile composite roadbed structure in degenerated permafrost region

Abstract

The invention discloses a reinforced hot melt pile / reinforced gravel pile composite roadbed structure in a degenerated permafrost region, and relates to a roadbed structure in the degenerated permafrost region, and aims to solve the technical problems that at present, road thaw collapse damage caused by permafrost region frozen soil degradation cannot be effectively controlled, moisture cannot berapidly discharged after frozen soil is thawed, a foundation becomes a soft foundation, the bearing capacity of the foundation is insufficient, and uneven settlement of a road occurs. The multiple reinforced hot melting piles and the multiple reinforced gravel piles are vertically arranged in the permafrost foundation, the upper-layer unfrozen soil foundation and the lower-layer unfrozen soil foundation. According to the novel roadbed structure for the degeneration type high-temperature permafrost region, two different pile bodies, namely the reinforced hot melting pile and the reinforced gravel pile, are used for forming a novel binary pile composite roadbed, the melting effect of heat released by the hot melting pile on frozen soil and the excellent drainage capacity of the gravel pile are combined, and pre-melting of the frozen soil and drainage consolidation of the melted soil can be achieved at the same time.

Description

technical field [0001] The invention relates to a subgrade structure in degraded permafrost regions. Background technique [0002] The area of ​​permafrost is widely distributed. In my country, only the Greater and Lesser Khingan Mountains and the northern part of the Songnen Plain are covered with 390,000 square kilometers of permafrost. However, due to the combined effects of global warming and frequent human engineering activities, the permafrost environment in Northeast China is losing its original thermal balance. Taking the island-shaped permafrost region in Northeast my country as an example, the melting of permafrost caused uneven settlement of infrastructure such as roads, which seriously affected the durability and stability of the superstructure. [0003] At present, the treatment of severely degraded permafrost foundations mainly follows the principles of "protection" and "destruction". However, due to the obvious degradation of permafrost, especially high-temp...

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Problems solved by technology

[0004] The present invention aims to solve the road thawing damage caused by the inability to effectively control the degradation of permafrost in permafrost areas, and the fact that the water cannot be quickly discharged after the permafrost melts, making the foundation a soft foundation, and the lack of bearing capacity of the foundation leads to unevenness in the road In order to solve the technical problems of settlement, a composite subgrade structure of reinforced thermal thaw piles / reinforced crushed stone piles in degraded permafrost areas is provided

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