Prefabricated block for frozen soil roadbed temperature reduction and frozen soil roadbed composite structure

Abstract

The invention relates to a prefabricated block for frozen soil roadbed temperature reduction and a frozen soil roadbed composite structure. The prefabricated block is of an integral structure, and comprises a ventilation passage (1) positioned at the upper part or the middle upper part and three convection heat exchange spaces respectively positioned at left and right lower sides and lower side ofthe ventilation passage (1). The prefabricated block uses the integral design; a plurality of prefabricated blocks are sequentially spliced; then, an integral ventilation passage of an embankment temperature regulation and control layer and an integral convection heat exchange space are formed by one step; convenience and high speed are realized; meanwhile, through the integral combination of theventilation passage and the convection heat exchange spaces, the composite temperature lowering effect of the forced convection of the ventilation pipe and the natural convection of the convection heat exchange space is reinforced, so that the one-way heat conduction effect of the temperature regulation and control layer is achieved to the maximum degree; the power and the temperature lowering effect of the heat exchange layer are exponentially improved; the engineering regulation and control effects are obviously improved; the frozen soil roadbed stability is greatly improved; meanwhile, thedifficult problem of frozen soil highway building is predominantly solved; the long-time safety and stability of the frozen soil engineering are ensured.

Description

Technical field [0001] The invention relates to the field of frozen soil engineering, in particular to a prefabricated block used for cooling the frozen soil roadbed and a frozen soil roadbed composite structure. Background technique [0002] Frozen soil is a kind of soil and rock with a temperature lower than 0℃ and containing ice. my country's permafrost (preservation time reaches 2 years to several million years) accounts for 21.5% of the country's land area, making it the third largest frozen soil country in the world. , And the area of ​​high-altitude permafrost is the largest in the world. [0003] my country’s construction of the Qinghai-Tibet Railway and Qinghai-Tibet Highway, as well as the upcoming Qinghai-Tibet Expressway, Xin-Tibet Highway, Xin-Tibet Railway, and the West Route of the South-to-North Water Transfer Project are all facing high temperatures (ie, permafrost with a temperature close to 0°C) and frozen soil with high ice content (ie. Many problems such as perm...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a prefabricated block and composite structure of frozen soil roadbed for cooling the frozen soil roadbed, so as to overcome the fatal defects of the existing composite roadbed structure in actual engineering application, and to effectively solve the problem of permafrost regions Find effective solutions to highway construction problems

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