Wall net combination structure with prevention and early warning functions of karst collapse and construction method

Abstract

The invention discloses a wall net combination structure with prevention and early warning functions of karst collapse. The wall net combination structure comprises a plurality of box-like structuralretaining walls (1), synthetic material nets (2) and early warning units (3), wherein fillers connected with the box-like structural retaining walls on the two sides is arranged between every two oppositely arranged box-like structural retaining walls (1); the two ends of each synthetic material net (2) are arranged in the space between every two oppositely arranged box-like structural retaining walls (1) and buried in the corresponding fillers; the synthetic material nets (2), the fillers and the box-like structural retaining walls (1) together form a stress structure; and each early warningunit (3) comprises a wire net arranged at the top of the corresponding synthetic material net (2) and used for synchronizing the corresponding synthetic material net (2) and a warning structure. The invention further discloses a construction method of the wall net combination structure with prevention and early warning functions of karst collapse. The construction cost is reduced, and meanwhile the roles of prevention and early warning of karst collapse are played.

Description

technical field [0001] The invention belongs to the technical field of karst prevention and early warning, and more specifically relates to a wall-net composite structure and construction method capable of preventing and early warning of karst collapse. Background technique [0002] The distribution area of ​​carbonate rocks in my country is about 1.3 million km2, and the limestone distribution in Guangxi, Guangdong, Yunnan, Guizhou, Sichuan, Hubei, and Hunan is concentrated and widespread, accounting for about half of the national distribution area. Karst collapse (karst breakdown survey) refers to that in karst areas, the karst caves in the lower soluble rock layer or the soil caves in the overlying soil layer collapse or subside due to the expansion of the cave itself or the instability of the roof under the influence of natural and human factors. collectively. The comprehensive system composed of karst caves, covering soil, and water (air) is prone to form soil caves or...

AI Technical Summary

Problems solved by technology

[0005] (1) The cost of prevention and control engineering is generally as high as 400-500 yuan / m2, which is obviously higher for the weakly karst-developed section, and there is a large engineering waste;

[0006] (2) Karst grouting is generally detected by geophysical contrast test, water injection contrast test and other methods, and the reliability of the detection methods is poor, and the quality and effect are difficult to control;

[0007] (3) The construction process is complex and lengthy, and the monitoring cannot achieve no dead ends. Poor grouting quality has become a long-standing problem in the engineering field that cannot be completely solved;

[0008] (4) Karst collapse has no early warning function. When karst collapse occurs during the operation period due to poor construction quality, the safety of surface structures, appendages, and personnel cannot be guaranteed;

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