An anchoring device for preventing freeze-thaw damage of slopes in cold regions

Abstract

The invention discloses an anchoring device for preventing freeze-thaw damage of slopes in cold regions, comprising an anchoring assembly anchored on slopes in cold regions, the anchoring assembly includes an anchoring body and a shell-expanding anchoring head arranged at the front end of the anchoring body, the anchoring A closed liquid storage chamber is formed in the body, and the liquid storage chamber is filled with phase change liquid. The part of the anchor body provided with the liquid storage chamber is divided into an evaporation section, an adiabatic section and a condensation section from front to back, and the condensation section Extending to the outside of the slope, the thermal insulation section is located in the shotcrete support layer on the surface of the slope, and the evaporation section is located in the freeze-thaw circle of the slope. The invention can prevent the freeze-thaw change of the surface rock mass of the slope caused by the external climate change, prevent the damage, deterioration and denudation of the rock slope in the cold region caused by the freeze-thaw cycle, and is beneficial to maintain the long-term stability of the slope in the cold region.

Description

technical field [0001] The invention relates to the technical field of slope engineering anchoring, in particular to an anchoring device for preventing freeze-thaw damage of slopes in cold regions. Background technique [0002] my country's high-altitude cold regions are rich in mineral resources and concentrated in distribution. The large temperature difference between positive and negative in this area, the cycle of day and night, and the change of seasons, and the freeze-thaw cycle caused by constant temperature changes seriously threaten the safety of geotechnical engineering in cold regions. A large number of irregular and multi-scale pores and cracks are scattered inside the slope rock mass. These defects produce mechanical, physical, and chemical changes under the action of water and freeze-thaw cycles. The micro-defects in the rock continue to deteriorate and gradually evolve into Macro cracks cause slope instability and failure. [0003] The current protective mea...

AI Technical Summary

Problems solved by technology

The change of climate temperature will form a freeze-thaw circle on the surface of the rock mass of the slope, and the freeze-thaw cycle will continuously erode the rock mass, resulting in the expansion of cracks in the freeze-thaw circle, the reduction of bearing capacity, and the phenomenon of spalling, chipping, and sandification on the surface of the rock mass. The effect gradually dissipates, and the slope maintenance cannot be guaranteed, so the protective effect is not obvious, and the long-term performance is poor

[0005] 2) Install thermal insulation layer and secondary support: This type of protection is provided with a layer of thermal insulation layer between the primary protection and the secondary lining to prevent the change of external climate temperature from being transmitted to the interior of the rock mass and reduce heat exchange. It has certain positive significance for the prevention and control of freeze-thaw disasters, but there are still some problems. For example, the thermal insulation layer can block the freezing back of the surrounding rock freeze-thaw zone. When it is cold, the rock mass in the freeze-thaw zone cannot be further frozen or slowed down. The freezing speed is reduced, and the cost of secondary lining is high, and the economy is poor

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