Frame-heat anchor pipe structure for preventing and treating cold-region slope collapse due to freeze thawing and construction method

Abstract

A frame thermal anchor pipe structure and construction method for preventing freeze-thaw slump of slopes in cold regions, the structure is composed of beams (1), columns (2), protective surfaces (5) and thermal anchor pipes (7). The thermal anchor pipe (7) consists of a condensation section (A), an evaporation section (B) and an anchor section (C). When the invention is used, the evaporation section of the heat anchor pipe absorbs the heat of the freeze-thaw layer in the slope under the action of the temperature difference and transmits it to the condensation section, and then dissipates it into the atmosphere to reduce the temperature of the slope soil, thereby reducing the transfer of freeze-thaw slump Give the earth pressure to the frame, and anchor the hot anchor pipe in the well-frozen stable ground by the anchor section. The frame is connected with the thermal anchor pipe to form a spatial structure, and the two work together to improve the overall stability of the permafrost slope. It is suitable for the prevention and control of freeze-thaw landslides on slopes in cold regions, and the construction is convenient, the construction period is short, and the cost is low.

Description

technical field [0001] The invention relates to a frame thermal anchor pipe structure and a construction method for preventing freeze-thaw slump of slopes in cold regions, and is suitable for the support field of roads, railway slopes and natural slopes in cold regions. Background technique [0002] A large number of high slopes are produced in the construction of highways and railways in cold regions. Due to the special physical properties of permafrost, shallow landslides will occur under the action of freeze-thaw cycles, which poses a major threat to the safe operation of highways and railways. Therefore, engineering measures must be taken. Technology governs it. At present, there are three main engineering technologies used to prevent the freeze-thaw slump of slopes in cold regions: the first is to use non-frost-heave coarse aggregate with a large permeability coefficient to completely replace the frost-heave soil of the slope; the second is to use drainage barriers The...

AI Technical Summary

Problems solved by technology

[0003] The use of non-frost-heave coarse aggregate will increase the project cost by dozens of times, and the construction period will be long; the use of a stable structure with drainage and heat insulation cannot completely solve the slump caused by the freeze-thaw cycle, and it is not suitable for the stability of high and steep slopes. It is even more unfavorable; the use of ordinary retaining structures cannot fundamentally solve the shallow landslides caused by periodic frost heaving and thawing, and cause large economic losses and potential safety hazards

In addition, hot rod technology has been widely used in engineering construction in cold regions and has achieved good results, but there are still defects in controlling the freeze-thaw slump of slopes only by using hot rods.

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