Frame-aeration cooling anchor pipe structure for keeping frozen soil slope stable and construction method

Abstract

The invention discloses a frame-aeration cooling anchor pipe structure for keeping a frozen soil slope stable and a construction method. The frame-aeration cooling anchor pipe structure is composed of a cross beam (1), an upright (2), a protective cover (7), an aeration anchor pipe (8) and gravels (18). The aeration anchor pipe (8) is composed of an aeration pipe (9) for aeration, and an anchor pipe (10) which is arranged in the aeration pipe (9) and used for pressure grouting and anchoring. In the use of the frame-aeration cooling anchor pipe structure for keeping the frozen soil slope stable, convective heat exchange is aroused between air in the aeration pipe and air in the gravel layer under the action of temperature difference, so that heat in the slope body is exchanged into atmosphere; in addition, cold air enters a freeze thawing layer through the aeration pipe under the action of wind to reduce the temperature of the slope body; as a result, soil pressure transferred to the frame by freeze thawing collapse is reduced; the frame is anchored in the well-frozen stable stratum by the anchor pipe. The frame is connected with the aeration anchor pipe to form a space structure, and the frame and the aeration anchor pipe work integrally to improve the overall stability of the slope, and therefore, the frame-aeration cooling anchor pipe structure is applicable to prevention and treatment of slope instability in a freeze soil area; moreover, the construction process is simple, and the construction cost is low.

Description

technical field [0001] The invention relates to the technical field of engineering construction in permafrost regions, and is particularly suitable for road, railway and natural slope support projects in permafrost regions. Background technique [0002] There are various slopes in the construction of highways and railways in permafrost areas. Due to the particularity of permafrost and its sensitivity to the environment, as well as the current environmental changes such as the greenhouse effect, rising temperatures, and ecological damage, the upper limit of permafrost As a result, permafrost slopes become unstable and slide, posing a serious threat to the safe operation of roads and railways. In the permafrost slope engineering, measures that can actively protect the permafrost living environment and maintain slope stability have not been taken. The current main measures are: (1) use drainage structures to reduce the groundwater level and moisture content of the slope; (2 ) ...

AI Technical Summary

Problems solved by technology

The above measures not only did not fundamentally solve the shallow landslides caused by frost heaving and thawing, but also left great safety hazards for permafrost slope engineering.

[0003] Ventilation pipe technology has been widely used in subgrade engineering construction in permafrost regions and has achieved good results, but ventilation pipes cannot be used to control slope instability

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