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Conductive composite vacuum soft soil reinforcing prepressing method

A soft soil and preloading technology, applied in soil protection, construction, infrastructure engineering, etc., can solve the problems of long construction period, high cost, tearing vacuum membrane, etc., and achieve the effect of reducing construction cost and saving treatment

Inactive Publication Date: 2013-02-13
SHANGHAI HARBOUR SOFT SOIL TREATMENT ENG CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for quicker and more cost-effectively treating soft ground that has very little or no load capacities compared to traditional methods like fillings made from sandbags. It eliminates the need for expensive machines while still providing effective strengthening support during excavation work.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the strength and durableness of soft bases used around urban areas due to their lacking natural vegetative bonds that allow seepages through them without causing damage. Current solutions involve either increasing pressure or adding more materials like sand into the base material itself (VSE) or modifying existing processes to improve its properties. However these techniques result in higher costs associated with each other.

Method used

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  • Conductive composite vacuum soft soil reinforcing prepressing method
  • Conductive composite vacuum soft soil reinforcing prepressing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a freshly filled silt has an extremely soft site with almost zero initial bearing capacity. Since the site is freshly filled with silt, its initial bearing capacity is almost zero. Therefore, foundation treatment is required to increase its bearing capacity to 60Kpa-90Kpa for subsequent construction.

[0028] The specific method is as follows: firstly, the plastic drainage board 1 is artificially inserted on the treated soil 7, the depth of the plastic drainage board 1 inserted into the treated soil 7 is 2 meters to 27 meters, and the adjacent plastic drainage boards The distance between 1 is 0.3m to 4.0m. Metal wires 5 are provided inside the plastic drainage board 1. The metal wires 5 in the plastic drainage board 1 are connected to the electrodes of the pulse current, and the adjacent metal wires 5 are connected to electrodes of different polarities. Pulse current electrode connection, specifically set as: the metal wire 5 of the first ro...

Embodiment 2

[0032] Such as figure 2 As shown, a certain construction site has been measured, and the initial bearing capacity of the surface layer of 0-4 meters is about 20KPa, which is a very soft foundation, and high-vacuum compaction equipment cannot enter the site for construction. According to the high-vacuum densification equipment entering the construction site, the surface bearing capacity requirement is 60Kpa ~ 70Kpa, so as to carry out subsequent construction.

[0033] The specific method is as follows: firstly, the plastic drainage board 1 is artificially inserted on the treated soil 7, the depth of the plastic drainage board 1 inserted into the treated soil 7 is 18 meters to 44 meters, and the adjacent plastic drainage boards The distance between 1 is 1.7 meters to 3.5 meters. The metal wire 5 is wound on the outside of the plastic drainage board 1. The metal wire 5 is connected to the electrode of the pulse current, and the adjacent metal wire 5 is connected to the pulse cur...

Embodiment 3

[0037] Such as figure 1As shown, a certain construction site has been measured, and the initial bearing capacity of the surface layer of 0-3 meters is about 10KPa, which is a very soft foundation, and high-vacuum compaction equipment cannot enter the site for construction. According to the high-vacuum densification equipment entering the construction site, the surface bearing capacity requirement is 60Kpa ~ 70Kpa, so as to carry out subsequent construction.

[0038] The specific method is as follows: firstly, the plastic drainage board 1 is artificially inserted on the treated soil 7, the depth of the plastic drainage board 1 inserted into the treated soil 7 is 27 meters to 50 meters, and the adjacent plastic drainage boards The distance between 1 is 1.1 meters to 5.0 meters. The metal wire 5 is arranged inside the plastic drainage board 1. The metal wire 5 is connected to the electrode of the pulse current, and the adjacent metal wire 5 is connected to the pulse current elect...

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Abstract

The invention discloses a conductive composite vacuum soft soil reinforcing prepressing method which comprises the following steps: 1, manually inserting a plurality of rows of conductive plastic drainage plates on a processed soil body, and externally retaining appropriate lengths; 2, connecting the conductive plastic drainage plates with the positive pole or negative pole of a pulse current particularly in such a way: the first row of conductive plastic drainage plates are connected with the positive pole or the negative pole of the pulse current, the second row of conductive plastic drainage plates are connected with the negative pole or the positive pole of the pulse current, and so on; 3, arranging a flexible pipe on the surface of the processed soil body, wherein one end of the flexible pipe is communicated with the externally retained parts of the conductive plastic drainage plates, and the other end of the flexible pipe is connected to vacuum extraction equipment; and 4, paving a vacuum membrane on the processed soil body, and carrying out vacuum extraction prepressing under the vacuum membrane. The conductive composite vacuum soft soil reinforcing prepressing method disclosed by the invention can achieve the purpose of fast and economic soft soil foundation processing when processing a soft soil foundation and particularly processing a soft soil foundation which has initial bearing capacity almost equal to zero, of a coastal beach, a newly hydraulic fill area, and the like, can also prevent the cumbersome mechanical equipment from being used, thereby reducing the construction cost.

Description

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Claims

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Application Information

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Owner SHANGHAI HARBOUR SOFT SOIL TREATMENT ENG CO LTD
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