Soft soil foundation high side pressure quick-discharging consolidation method

A soft soil foundation, drainage consolidation technology, applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as failure of foundation reinforcement, difficulty in dissipating pore water pressure, damage to the original structure of saturated soft soil, etc. Benefits and social benefits, shortening the construction period and improving the strength of the project

Inactive Publication Date: 2007-09-26
周健 +3
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AI Technical Summary

Problems solved by technology

Under the existing construction technology of drainage consolidation method, if the foundation is to be strengthened in a short time, the ground load must be increased, and the increase of the ground load will not fundamentally change the horizontal radial seepage consolidation speed in the foundation. On the contrary, the stress generated by the foundation soil under heavy load will seriously damage the original structure of the saturated soft soil, resulting in a significant decrease in its permeability, making it difficult for the pore water pressure to dissipate and remain high, leading to the failure of foundation reinforcement
Therefore, the existing drainage consolidation method takes a long time to strengthen the soft soil foundation. The main reason is that the horizontal radial consolidation of the soft soil foundation cannot be solved.

Method used

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Embodiment 1

[0008] This embodiment is a newly dredged fill of the beach, with an area of ​​13,000 square meters, 0.2m of the surface layer is sandy silt, and below it is 4.0m thick dredged fill muddy silty clay sandwiched with silt, with a water content of 59.3%. The force is less than 30KPa.

[0009] Using the process of the present invention to carry out foundation reinforcement treatment

[0010] (1) First level the site and lay a cushion on the surface. The cushion is silty sand with a thickness of 0.4m and the clay content is less than 5%. At the same time, pre-bury the piezometer and other test components.

[0011] (2) According to soil conditions and foundation reinforcement requirements, use a 0.2m diameter high-pressure hose, one end of the high-pressure hose is closed, the other end is open, and the closed end is buried in the soil. The high-pressure hoses are spaced at 1.5m, arranged in a square, and inserted into the soil to a depth of 5.0m. After the high-pressure hose is s...

Embodiment 2

[0018] This embodiment is a newly dredged fill of the beach, with an area of ​​10,000 square meters. The surface layer is 0.3m sandy silt, and the bottom is 5.0m thick dredged fill muddy silty clay sandwiched with silt, with a water content of 62.0 %, bearing capacity is less than 40KPa.

[0019] Using the process of the present invention to carry out foundation reinforcement treatment

[0020] (1) First level the site and lay a cushion on the surface. The cushion is 0.3m thick silty sand with a clay content of less than 5%. At the same time, pre-embed the piezometer and other test components.

[0021] (2) According to soil conditions and foundation reinforcement requirements, use a 0.2m diameter high-pressure hose, one end of the high-pressure hose is closed, the other end is open, and the closed end is buried in the soil. The high-pressure hoses are spaced at 2.0m, arranged in a square, and inserted into the soil to a depth of 6.0m. After the high-pressure hose is set, its...

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Abstract

The invention relates to a soft foundation discharge fixing technique, used to quickly fix and strengthen soft foundation. The invention combines high-pressure tube device and upright discharge device, to force high pressure on the high-pressure tube, to repeatedly expand the high-pressure tube to sideward press soil, to quickly solidify the soil step from step, and improve the soil strength, to strength the foundation. The strengthen depth of foundation is not limited by soil saturated degree, to confirm the strength quality. The time cost by the invention is 1/4-1/2 of traditional discharge strengthen method, while its cost is 50-70% of traditional discharge strengthen method, with simple operation, non additional construction field, and repeated used tools, non pollution and waste, and significant economic and social benefits.

Description

technical field [0001] The invention relates to a soft soil foundation drainage consolidation treatment technology, which is suitable for fast consolidation and reinforcement treatment of the soft soil foundation. Background technique [0002] At present, the method of drainage consolidation is usually used for the reinforcement of soft soil foundation, mainly by using the self-weight of the soil, loading on the foundation, generating vacuum negative pressure in the foundation soil, and through the vertical Directional drainage devices, such as: sand wells, drainage boards, etc., allow the pore water in the foundation soil to drain horizontally and radially to the sand wells or drainage boards, and drain the water to the surface through the sand wells or drainage boards, and at the same time the foundation is gradually solidified Knot. The main problem of the existing method is that the stress in the soil generated by the vertical pressure on the surface has a small effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10
Inventor 周健刘文白田维林贾敏才
Owner 周健
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