Filling method for karst surface collapse of shallow-buried karst area

A karst and ground technology, which is applied to the environment-friendly filling treatment of ground subsidence pits in shallow buried karst areas, and the filling field of karst ground collapse, can solve problems such as groundwater channel blockage, sidewall scouring, and collapse, and achieve low engineering costs, The effect of reducing environmental pollution and easy availability of materials

Active Publication Date: 2016-10-12
HEBEI CONSTR & INVESTIGATION RES INST
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Problems solved by technology

[0003] The purpose of the present invention is to provide a filling method for karst ground subsidence in shallow-buried karst areas, which solves the technical problem of continuous subsidence caused by groundwater channel blockage or side wall erosion caused by filling material problems in the currently commonly used karst filling treatment methods

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  • Filling method for karst surface collapse of shallow-buried karst area

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Embodiment

[0032] A karst area treatment project in Guangxi, China. The site is a typical karst landform. There are grooves formed by the dissolution and erosion of the site. There are prominent stone teeth distributed between the grooves. There are dissolved depressions on the site, and the local surface is covered with red clay. Due to the development of karst in the bedrock of the site, pile foundations are used for the construction (structure) of the project. However, in the green area of ​​the factory area, in order to prevent further subsidence, it is necessary to take treatment measures for karst and use the method of the present invention to fill deal with.

[0033] Utilize the karst collapse filling procedure of the present invention to be:

[0034] Step 1: Find out the distribution range and scale of karst soil caves, and design the excavation slope ratio of 1:1.

[0035] Step 2: In the karst subsidence, delineate the excavation range according to the slope ratio of the slope,...

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Abstract

The invention discloses a filling treatment method for surface collapse of shallow-buried karst caves of a karst area. According to the method, the excavation earthing gradient is designed according to distribution and development situations of the shallow-buried karst caves detected out through exploration; the karst caves are filled with gravel to corresponding cave openings after excavation, and the gravel filling the caves is 200-800 mm in diameter; then geotechnical cloth is laid on a slope to the ground and outwards extends by the length not smaller than 1.5 times the pit depth; after laying is completed, the cave openings are filled with graded gravel to the ground and tamping in layers is conducted; and nutrient soil is laid on the surface layer backfilled with the gravel and vegetation is planted. Disadvantages of a conventional filling method are avoided; and not only is the anti-collapse and water guide treatment effect guaranteed, but also certain durability is achieved. Engineering practice proves that the filling method has relatively good practicability and can be used for treatment for the karst surface collapse. The filling treatment method for the surface collapse of the shallow-buried karst caves of the karst area has a relatively good environmental protection effect, materials are easy to obtain, and the cost is low.

Description

technical field [0001] The invention relates to a filling method for karst ground subsidence, in particular to an environment-friendly filling treatment method for ground subsidence pits in shallow-buried karst areas, and belongs to the technical field of foundation treatment. technical background [0002] Karst ground subsidence refers to the general term for collapse or subsidence caused by roof instability in karst areas, karst caves in the lower soluble rock layer or soil caves in the overlying soil layer. Since the 1950s, due to the rapid development of engineering activities, geological disasters of karst collapse have also become more frequent. Especially in the past 10 years, the process of urbanization in my country has been accelerated, the development and utilization of water resources and land resources in karst areas have been increasingly strengthened, and the frequency, intensity and harm of karst ground subsidence have also increased. Therefore, the control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/18
CPCE02D17/18
Inventor 聂庆科梁书奇王英辉贾向新田鹏程李建鹏
Owner HEBEI CONSTR & INVESTIGATION RES INST
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