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Method for reinforcing soft soil foundation through vacuum prepressing combined electroosmosis method

A technology of soft soil foundation and electroosmosis, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of low failure rate, achieve the effects of avoiding bending, reducing energy consumption, and high engineering application value

Active Publication Date: 2019-08-30
HOHAI UNIV
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Problems solved by technology

[0006] In order to solve the above problems, the present invention proposes a method of vacuum preloading combined with electroosmosis to strengthen the soft soil foundation, which reduces the energy consumption in the electroosmosis stage, gives full play to the advantages of vacuum preloading and electroosmosis, and improves the soft soil after reinforcement. The strength of the foundation, and can effectively alleviate the problem of uneven strength of the foundation soil after reinforcement, and the failure rate is low

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  • Method for reinforcing soft soil foundation through vacuum prepressing combined electroosmosis method

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Embodiment Construction

[0031] The present invention proposes a method for strengthening soft ground by vacuum preloading combined with electroosmotic method, which uses a vacuum preloading combined with electroosmotic device, such as figure 1 , including a conductive plastic drainage board 1, an electroosmotic power supply 2, a wire network 3, a horizontal filter tube 4 and a vacuum device 5.

[0032] Such as image 3 and Figure 4 , the conductive plastic drainage plate includes a base plate 11 and two hollow tubes 12 vertically penetrating through the base plate 11; the central axes of the two hollow tubes 12 are located on the same plane as the base plate 11; the hollow tubes Vertical grooves 13 are arranged on the outer surface of 12 and both sides of the substrate 11; the bottom of the groove 13 on the outer surface of the hollow tube 12 is arranged with round holes 14 arranged vertically and uniformly.

[0033] An electrode 6 is embedded in the hollow tube 12 . The electrode 6 is connected ...

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Abstract

The invention provides a method for reinforcing a soft soil foundation through a vacuum prepressing combined electroosmosis method. The method comprises the steps: firstly, a vacuum prepressing combined electroosmosis device is arranged on the soft soil foundation and comprises a plurality of drainage assemblies which are inserted into the soft soil foundation, arranged in an arrayed mode at equalintervals, and internally provided with electrodes, and the electrodes in the adjacent drainage assemblies are opposite in polarity; then vacuum prepressing is conducted through the vacuum prepressing combined electroosmosis device till the soil body water content is decreased to 80%, then the electroosmosis output voltage of the vacuum prepressing combined electroosmosis device is turned on forelectroosmosis drainage, and meanwhile the effective voltage between the electrodes of the adjacent drainage assemblies is detected; and every time after the decreasing speed of the effective voltageis decreased to be nearly zero, the electroosmosis output voltage is gradually decreased stage by stage by (1 / 4)-(1 / 3). Energy consumption of the electroosmosis stage is lowered, the advantages of a vacuum prepressing method and an electroosmosis method are taken into full play, the strength of the reinforced soft soil foundation is improved, the problem of uneven strength of reinforced foundationsoil can be effectively relieved, and the failure rate is low.

Description

technical field [0001] The invention relates to the technical field of foundation soil reinforcement, in particular to a method for strengthening soft soil foundations by vacuum preloading combined with electroosmosis. Background technique [0002] At present, the direct reclamation method is often used in land reclamation projects, and the reinforcement of large areas of deep and soft soil foundations is the key to ensuring land reclamation. Conventional treatment methods for strengthening soft soil foundations in engineering generally include pile foundation method, vacuum preloading method, electroosmosis method, dynamic compaction method, etc. [0003] The electroosmosis method inserts a geosynthetic material electrode into the foundation soil and passes through a direct current. Under the action of the electric field, the water in the soil flows from the anode to the cathode and is discharged at the cathode, thereby reducing the moisture content of the highly viscous so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/11
CPCE02D3/11
Inventor 施文沈扬马英豪戚文成
Owner HOHAI UNIV
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