Special soft foundation consolidation method

A kind of foundation, extra-soft technology, applied in basic structure engineering, soil protection, construction and other directions, can solve the problems of unsafe mechanical walking, high cost, poor safety, etc., and achieve the effect of shortening construction period and easy and safe operation.

Active Publication Date: 2008-12-17
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

Due to the need to use a large amount of sand and gravel resources, and the bamboo board needs to be processed with moso bamboo poles, the cost is high, and the integrity i

Method used

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  • Special soft foundation consolidation method
  • Special soft foundation consolidation method
  • Special soft foundation consolidation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0060] Example 1 , Consolidation of the soft foundation of a project

[0061] The project is located in a development zone in Linhai. The project has carried out a large area of ​​silt filling, and foundation consolidation is required. After treatment, f ak >80kpa, the settlement after construction is less than 50cm.

[0062] The geological data of the construction site are: dredged silty soil, average thickness 4.5 meters, water content 90%, bearing capacity 12kPa, original soil layer is silt silt, average thickness 10 meters, water content w=45%, f ak ≈40kpa; the underlying layer is silty clay, f ak = 80kpa.

[0063] The specific implementation plan is as follows:

[0064] The self-made lightweight crawler slipper is used for construction. The specific construction parameters are determined by the following methods:

[0065] 1, f ap Ok

[0066] f ap ≥ 150 × 1.5 ...

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PUM

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Abstract

The invention provides a concretion method for ultra-soft foundation, comprising the steps as follows: geotextile is paved on the soft foundation and a bamboo rod grid is paved on the geotextile; plastic drainage plates are inserted; horizontal water permeable pipes are paved; the plastic drainage pipes are close to and surround the horizontal water permeable pipes, and are connected to a vacuum-pumping device; a vacuum film is covered and pressed and the vacuum is pumped. By adopting the concretion method provided by the invention, compared with the construction which adopts normal types (such as vacuum pre-pressing method or pile loading pre-pressing method) at home and abroad, as the sand cushion layer is not used, the construction can save manufacture cost by 35-70RMB/m<2>, furthermore, shorten the construction period by more than 20%, and ensure convenient and safe operation.

Description

technical field [0001] The invention belongs to the field of foundation treatment, and in particular relates to a method for consolidating an extra-soft foundation. Background technique [0002] Due to the limitation of arable land use, the current coastal industrial areas generally obtain enough land by dredging and filling mud from the sea to form land, and dredging mud will inevitably form a large area of ​​extremely soft foundation that cannot be accessed by man and machine. At present, methods such as vacuum preloading or surcharge preloading are generally used for the treatment of extra soft foundations, among which: [0003] The construction process of the vacuum preloading method is as follows: lay 1-2 layers of geotextile on the extra-soft foundation, then lay 1-2 layers of bamboo sheets, then lay a sand cushion layer larger than 80cm, and mechanically insert plastic drainage boards, and then lay After leveling the hose, lay another 1-2 layers of vacuum film, and f...

Claims

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Application Information

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