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Electroosmosis method and apparatus for dehydration for large area high moisture percentage earth body

A high-water content, large-area technology, applied in soil protection, construction, infrastructure engineering, etc., to achieve the effect of increasing peak voltage, uniform water content, and reducing contact resistance

Inactive Publication Date: 2011-03-30
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an electroosmotic method for dehydrating large-area high water content soil, which solves the defects in the existing electroosmotic dehydration technology, improves the dehydration efficiency, and reduces the energy consumption of dehydration

Method used

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  • Electroosmosis method and apparatus for dehydration for large area high moisture percentage earth body
  • Electroosmosis method and apparatus for dehydration for large area high moisture percentage earth body
  • Electroosmosis method and apparatus for dehydration for large area high moisture percentage earth body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 Shown, a kind of electroosmosis method that is used for the dehydration of large area high moisture content soil, its operation steps are as follows:

[0029] 1. Positioning, burying electrodes, inserting drainage boards

[0030] Accurately position according to the layout requirements and then bury the electrodes and insert the drainage board. The height above the ground is 0.1m, and the coarse sand is poured. The negative and positive electrodes are arranged in parallel and staggered. The corresponding electrode of the infiltration device; in order to prevent the current from excessive diversion from the soil surface, reduce the effect of electroosmosis and the occurrence of electric corrosion effect, the exposed metal parts above the ground of the cathode and anode should be cleaned before energization, and a layer of asphalt should be applied to reduce the electric current. Consumption; the two ends of the connection between the drain board and the...

Embodiment 2

[0046] The difference from Example 1 is:

[0047] (1) Constant current start: 6 electrodes are embedded in the soil at a depth of 5 meters, and the current of each electrode is set to 0.5 amperes, the initial current is 1.5 amperes and the target voltage value is 30 volts, and the steady current output mode is adopted, that is, the output current The initial current is constant at 1.5 amperes, and the output voltage increases with the electroosmotic dehydration at this time;

[0048] (2) Constant voltage maintenance: When the output voltage reaches the set target voltage value of 30 volts, it will switch to a regulated output, that is, the output voltage is constant at the target voltage value;

[0049] (3) Pulse strengthening: During the constant voltage holding process, the output voltage is superimposed on the target voltage value with a positive pulse voltage. The pulse voltage is 27 volts. When there is no pulse, the output voltage is the target voltage value. The cycle i...

Embodiment 3

[0054] The difference from Example 1 is:

[0055] (1) Constant current start: 2 electrodes are embedded in the soil to a depth of 5 meters, and the current of each electrode is set to 0.2 amperes, the initial current is 1.0 amperes and the target voltage value is 25 volts, and the steady current output mode is adopted, that is, the output current The initial current is constant at 1.0 ampere, at this time the output voltage increases with the electroosmotic dehydration;

[0056] (2) Constant voltage maintenance: When the output voltage reaches the set target voltage value of 25 volts, it will switch to a regulated output, that is, the output voltage is constant at the target voltage value;

[0057] (3) Pulse strengthening: During the constant voltage holding process, the output voltage is superimposed on the target voltage value with a positive pulse voltage. The pulse voltage is 20 volts. When there is no pulse, the output voltage is the target voltage value. The cycle is 20 ...

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Abstract

The invention relates to an electroosmotic method used for dewatering the soil with large area and high water content and equipment thereof. The operation comprises the following steps of: (1) constant current starting: adopting a constant current output mode, namely the output current is constant and the output voltage is variable; (2) constant voltage holding: when the output voltage reaches a preset value, the output voltage is converted into stable voltage and then output, namely the output voltage is constant and the output current is variable, and the stable working condition is held for long time; (3) strengthening impulse: in the process of holding constant voltage, impulse voltage is superimposed by a certain interval; (4) energization at intervals: energization and power off arecarried out alternatively; and (5) polarity convention: according to the change of water yield, the positive polarity and the negative polarity of output voltage of the special electroosmotic device are automatically changed. By improving the operation method to electroosmotic dewatering, the invention solves the defects in the prior art, improves dewatering efficiency and reduces the energy consumption.

Description

technical field [0001] The invention relates to a method for soil dehydration, in particular to an electroosmotic method for dehydrating large-area high-water-content soil, and is especially suitable for occasions such as tidal flat development with high water content, foundation treatment of buildings and structures, and the like. Background technique [0002] In the development of tidal flats in coastal areas, excavation of foundation pits of buildings and structures in some high water level areas, etc., the problem of how to dehydrate the soil is faced. These soils (soft clay, backfill soil, soil containing organic matter, etc.) generally have the characteristics of high moisture content, high compressibility, and small permeability coefficient. When the treatment area is large, filling and replacement methods should be used for such soil The method is obviously impractical, and only non-filling preloading, compaction, tamping and other methods can be used, and these meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/11
Inventor 曹泰斌杨静明刘青松
Owner JIAXING UNIV
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