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

Abstract

The invention discloses a frame-heat anchor pipe structure for preventing and treating cold-region slope collapse due to freeze thawing and a construction method. The structure is composed of a cross beam (1), an upright (2), a protective cover (5) and a heat anchor pipe (7), wherein the heat anchor pipe (7) is composed of a condensation section (A), an evaporation section (B) and an anchoring section (C). When the frame-heat anchor pipe structure for preventing and treating cold-region slope collapse due to freeze thawing is used, the evaporation section of the heat anchor pipe absorbs the heat of a freeze thawing layer in the slope under the action of temperature difference and transfers the heat to the condensation section, and then the heat is dispersed to atmosphere so that the temperature of the soil body of the slope is reduced; as a result, soil pressure transferred to the frame by freeze thawing collapse is reduced; the heat anchor pipe is anchored in well frozen stable stratum by the anchoring section. The frame is connected with the heat anchor pipe to form a space structure, and the frame and the heat anchor pipe work synergetically to improve the overall stability of the frozen soil slope, and therefore, the frame-heat anchor pipe structure is applicable to prevention and treatment of freeze thawing collapse of slopes in a cold region; moreover, the frame-heat anchor pipe structure is convenient to construct, short in construction period, and low in construction cost.

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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