Method for reinforcing soft clay foundation

A soil foundation and foundation technology, applied in soil protection, infrastructure engineering, construction, etc., to reduce the interface resistance, improve the reinforcement effect, and avoid the loss of electroosmotic energy.

Inactive Publication Date: 2014-04-30
HOHAI UNIV
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Problems solved by technology

[0004] Purpose of the invention: To provide a method for strengthening soft clay foundation to solve the defects existing in the existing vacuum preloading method and electroosmotic method

Method used

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  • Method for reinforcing soft clay foundation
  • Method for reinforcing soft clay foundation

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Embodiment 2

[0033] This embodiment is basically the same as Embodiment 1, especially in that:

[0034] In this embodiment, ordinary plastic drainage boards and conductive plastic drainage boards 3 are used in combination, and ordinary plastic drainage boards are arranged in the foundation of the center line of two rows of conductive plastic drainage boards 3, and are arranged alternately with conductive plastic drainage boards 3. The method of artificially inserting the board is laid, the ordinary plastic drainage board is connected to the horizontal closed drainage system 4, the conductive plastic drainage board 3 is connected to the electrified wire system 5, and the conductive plastic drainage board 3 moves the water in the deep soil to the shallow soil After body, the common plastic drainage board will drain the moisture under the action of vacuum pressure. Compared with the first embodiment, the distance between the electrodes 3 of the conductive plastic drainage board can be appropri...

Embodiment 3

[0035] Embodiment 3: In this embodiment, during the vacuum electroosmosis dewatering process of Embodiment 1 and Embodiment 2, heaping and water preloading are carried out, or after the vacuum electroosmosis dewatering is completed, low-energy dynamic compaction is carried out to further strengthen the soft clay foundation .

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Abstract

The invention discloses a method for reinforcing a soft clay foundation. The method comprises the following steps that equipment needed by a vacuum preloading method and an electroosmosis method is arranged on a pre-reinforced foundation; and the foundation is processed through an intermittent vacuum preloading method and a vacuum preloading-electroosmosis alternating method. At the early stage, soil body water content is high, most free water in soil is discharged through the intermittent vacuum preloading method, the problem that upper layer soil body solidification is too quick, so that lower portion soil body upward water discharging is affected can be avoided, pore water in a deep foundation layer can be driven to flow from an anode to a cathode through the electroosmosis method, the pore water is dredged upwards along a conducting plastic water discharging plate and is accumulated in a shallow soil layer, and water in the shallow soil layer can be effectively discharged by vacuum preloading. Accordingly, the advantages of the two methods can be combined in vacuum electroosmosis alternating reinforcement to achieve effective reinforcement on the soft clay foundation, loss of electroosmosis energy by vacuum preloading is avoided, energy using rate is improved, great reinforcing effect is achieved, and the reinforced soft clay foundation has high bearing force.

Description

technical field [0001] The invention relates to geotechnical engineering related technologies, in particular to a method for strengthening soft clay foundations. Background technique [0002] At present, the common method to deal with large-area ultra-soft foundation is vacuum preloading method. Vacuum preloading method is more effective for free water in the soil, while muddy soil has a higher content of bound water and finer particles. The degree of vacuum increases with the depth of the foundation. Therefore, the reinforcement effect of the shallow soft clay foundation is better, forming a hard crust, and the deep foundation cannot be effectively reinforced; for the foundation after vacuum preloading treatment, even if the surface consolidation degree is very high However, the shear strength is still low, and the bearing capacity of the foundation is still difficult to meet the use requirements. [0003] Electroosmosis can drive the pore water in the soil to flow from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10
Inventor 高明军孙召花余湘娟胡品飞胡士勤王有成
Owner HOHAI UNIV
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