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A filling method for karst ground subsidence in shallow buried karst areas

A karst and ground technology, which is applied to the filling of karst ground subsidence, and the field of environmental protection filling treatment of ground subsidence pits in shallow-buried karst areas. The effect of reducing environmental pollution and easily obtaining materials

Active Publication Date: 2019-01-04
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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  • A filling method for karst ground subsidence in shallow buried karst areas

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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. The site is distributed with dissolved depressions, 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 the karst and use the method of the present invention for filling 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: Delineate the excavation range at the karst subsidence according to the slope ratio...

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Abstract

The invention discloses a method for filling and controlling ground subsidence of shallow buried karst caves in karst areas. According to the distribution and development of the shallow buried caves found in the survey, the method designs the slope of the excavated soil, fills the cave with gravel to the entrance of the cave after excavation, and the diameter of the filled gravel is 200 mm to 800 mm. Then, lay geotextiles on the slope to the ground and The length extending outward is not less than 1.5 times the depth of the pit. After the paving is completed, the graded gravel is filled from the hole to the ground and compacted in layers. On the surface of the backfilled gravel, nutrient soil is laid and vegetation is planted. It avoids the disadvantages of the traditional filling method, not only ensures the effect of anti-collapse and water guiding, but also has certain durability. Engineering practice proves that the filling method of the present invention has good practicability and can be used for the control of karst ground subsidence. The invention has good effect on environmental protection, and the 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 Patents(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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