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Beading cave pretreatment construction method

A construction method and pretreatment technology, which is applied in the direction of foundation structure engineering, soil protection, sheet pile walls, etc., can solve the problems of high cost, inconvenient construction, limitations, etc., to ensure filling degree, simple and efficient process, and avoid quality The effect of the accident

Inactive Publication Date: 2018-12-18
CHINA CONSTR FOURTH ENG DIV
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AI Technical Summary

Problems solved by technology

[0002] The pretreatment of beaded karst caves is a major problem in the treatment of bad foundations. The traditional treatment methods of beaded karst caves are relatively limited, including the following points: 1. The detection only uses the advanced drilling method, which cannot specifically detect the plane size and development of beaded karst caves
2. The double steel pipe method is often used for processing, which is costly, inconvenient to construct, and the materials cannot be recycled and reused
3. The traditional beaded karst cave program did not specify the corresponding acceptance measures after processing, resulting in uncontrollable quality

Method used

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Embodiment

[0021] refer to figure 1 with figure 2 , the present embodiment provides a construction method for pretreatment of beaded karst caves, the specific method is as follows:

[0022] The advanced drilling method and tube wave detection method are used to detect the beaded karst caves, and the advanced drilling rig is used to drill the pile positions in the areas where the karst caves have been proven to form advanced drilling holes 14. Three drilling holes are tentatively designated for exploration and injection. Slurry and exhaust; pre-embed 48*3 thick sleeve valve pipe 12, the sleeve valve pipe 12 is made of PVC, and a group of 4Φ8mm grouting holes are opened every 330mm on the sleeve valve pipe 12 in the grouting section of the cave. The longitudinal length is 60mm, and each group of grouting holes is wrapped with a layer of rubber sleeve, which is 80mm long, and is wrapped when the sleeve valve tube 12 is lowered to ensure that the grouting hole is just at the corresponding ...

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Abstract

The invention provides a beading cave pretreatment construction method. A method with an advance boring method and a pipe wave detection method combined is adopted for detecting the size and positionof beading caves. Slurry with different matching ratios is configured according to the size of the beading caves, and the filling degree of the beading caves is ensured. Materials are simple and highin efficiency compared with an original technology, the problem of treatment when the beading caves are distributed not evenly is effectively solved, when the cave treatment slurry reaches the strength of the design requirement, the pipe wave detection method is adopted for checking and accepting the treatment result of the beading caves, a treated foundation meets the requirement for bearing force of a pile foundation, quality accidents caused by the beading caves is extremely avoided, and subsequent construction and later input use can be effectively safely ensured. The beading cave pretreatment construction method belongs to the technical field of foundation and foundation construction.

Description

technical field [0001] The invention relates to a bad foundation treatment construction technology, which belongs to the technical field of foundation and foundation treatment construction technology in industrial and civil construction projects. Background technique [0002] The pretreatment of beaded caves is a major problem in the treatment of bad foundations. The traditional treatment methods for beaded caves are relatively limited, including the following points: 1. The detection only uses the advanced drilling method, which cannot specifically detect the plane size and development of beaded caves. 2. The double steel pipe method is often used for processing, which is costly, inconvenient for construction, and the materials cannot be recycled and reused. 3. The traditional beaded karst cave program did not specify the corresponding acceptance measures after processing, resulting in uncontrollable quality. Contents of the invention [0003] The object of the present i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/34E02D3/12
CPCE02D3/12E02D5/34
Inventor 林腾远曾平梁森李松晏韩庆忠
Owner CHINA CONSTR FOURTH ENG DIV
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