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Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method

A high-vacuum, soft foundation technology, applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of large investment and environmental protection, and achieve the effect of saving huge investment and reducing construction costs

Active Publication Date: 2009-06-17
SHANGHAI HARBOUR SOFT SOIL TREATMENT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of sand cushions requires a large investment and is not environmentally friendly. Therefore, it is necessary to improve this construction method to reduce construction costs.

Method used

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  • Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method
  • Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method
  • Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method

Examples

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Embodiment

[0023] Example , a certain 1 million m 2 Freshly filled silt, very soft ground with almost zero initial bearing capacity

[0024] 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 40-60Kpa for subsequent construction. The ground treatment method is as follows:

[0025] First lay a layer of colored cloth on the surface of the soft soil as the first layer, then lay a layer of vetch on the colored cloth as the second layer, and then lay geotextiles on the vetch as the third layer.

[0026] refer to Figure 1~4 , on the laid geotextile, use a portable manual inserting frame to arrange the plastic drainage boards manually, arrange the drainage boards into a square or an equilateral triangle, the distance between the plastic drainage boards is 1.1 to 1.4 meters, and place the plastic Leave 30-60cm outside the drainage board above the geotextile.

[0027] At th...

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Abstract

The invention provides a fast treating method of shallow soft foundation by solid and high-vacuum heaped preloading. The method comprises the following steps: (A) the surface of the soft soil is laid with a layer of striped fabric which is laid with a layer of vitex basketry; the vitex basketry is laid with a layer of geotextile which is inserted with a plastic draining board; the plastic draining board is externally left by a proper length and is provided with a horizontal draining facility; one end of the horizontal draining facility is connected with the externally left part of the draining board and the other end thereof is connected with vacuum-pumping equipment; a vacuum film is laid on the horizontal draining facility which is built with a small peripheral dyke and is provided with a water-stop film; (B) vacuum pumping is carried out, and the pumped water is injected into the peripheral dyke so as to form heaped water; and (C) after vacuum pumping is carried out for a period, settling condition is observed; if the settlement everyday is less than 2 to 5mm for continuous 3 to 7 days, the vacuum pumping is stopped. The method provided with invention is adopted to treat the soft soil foundation, thus being capable of achieving the purpose of treating the soft soil foundation fast and simply, also avoiding the use of heavy mechanical equipment and sand mats and reducing the construction cost.

Description

technical field [0001] The invention relates to a large-area soft ground treatment method, in particular to a rapid "three-dimensional high-vacuum water-covered preloading" shallow soft ground treatment method. Background technique [0002] At present, the conventional drainage consolidation methods for soft soil foundation treatment mainly include: vacuum preloading method, surcharge preloading method and high vacuum compaction method. Using the above methods to treat soft soil foundation requires the use of machinery to walk on the soft foundation. Therefore, the initial bearing capacity of the foundation generally needs to be above 30-40KPa. However, in the beach and newly filled areas, the initial bearing capacity is almost zero, so the above method cannot be directly used to treat the soft soil foundation, but the initial bearing capacity of the foundation needs to be increased first. [0003] In order to improve the initial bearing capacity, the method currently used ...

Claims

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Application Information

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IPC IPC(8): E02D3/10
CPCE02D3/10
Inventor 徐望
Owner SHANGHAI HARBOUR SOFT SOIL TREATMENT ENG CO LTD
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