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Technology for high-vacuum treatment of deep soft soil foundation through composite film

A soft soil foundation and high vacuum technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of poor engineering mechanical properties, low bearing capacity, poor permeability, etc., to reduce secondary consolidation settlement, pressure stable effect

Inactive Publication Date: 2020-07-24
曾国海
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  • Abstract
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Problems solved by technology

[0002] The tidal flats are widely distributed along the coast and along the river, and most of the tidal flats are soft soil (silt and clay) deposited in coastal and river facies. The overall characteristics of this soft soil are high water content, strong compressibility, poor permeability, low bearing capacity, and engineering mechanical properties. Difference

Method used

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  • Technology for high-vacuum treatment of deep soft soil foundation through composite film
  • Technology for high-vacuum treatment of deep soft soil foundation through composite film

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0042] The present invention will be described in detail with reference to the accompanying drawings.

[0043] Specific embodiments of the present invention are as follows: figure 1 , figure 2 shown:

[0044] Step 1: Lay out the vacuum system

[0045] 1. Apply the drainage board 6

[0046] The site is cleared and leveled, and the vacuum unit block is planned according to 5000-10000m2 square meters. The site is laid with 0.6-1.0m medium sand pads, and the drainage plates 6 are mechanically applied. The distance between the drainage plates 6 is 0.8-1.0m. The drainage plates 6 are arranged in a plum-shaped or rectangular shape.

[0047] 2. Set up sealing ditch 2. Cofferdam with bagged soil

[0048] A bagged soil cofferdam shall be set around the vacuum unit block with a height and width of not less than 0.5m, and the sealing trench 2 of the vacuum unit bl...

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Abstract

The invention discloses a technology for high-vacuum treatment of a deep soft soil foundation through a composite film. The technology comprises the following steps that (1) a vacuum system is arranged; (2) vacuum and water overload pre-pressing are performed for the first time through water-film compounding; (3) vacuum, overload and impact compaction are performed for the second time through soil-film compounding; and (4) post-construction intermittent vacuum drainage is carried out. According to the technology for high-vacuum treatment of the deep soft soil foundation through the composite film, the water-film compounding and soil-film compounding two-stage composite film sealing technology is adopted, the sealing and air closing effects are improved, and high-vacuum-degree prepressing is achieved. In the first stage, the overload preloading vacuum degree load is 90 kpa or above; and in the second stage, the overload preloading vacuum degree is 80 kpa, and the problem that the post-pile vacuum degree is sharply attenuated in the later stage in the traditional vacuum degree technology is solved.

Description

technical field [0001] The invention relates to a soft soil foundation treatment method, in particular to a deep soft soil foundation treatment technology which can be recycled by a vacuum pipeline system, multi-pass composite membrane high vacuum pre-pressing, and a three-dimensional network airtight airtight layer is formed on the site after construction. Background technique [0002] The tidal flats are widely distributed in coastal areas along the river. Most of the tidal flat sites are soft soils (silt and clay) deposited in the coastal and riverside facies. The overall characteristics of such soft soils are high water content, strong compressibility, poor permeability, low bearing capacity, and engineering mechanical properties. Difference. The natural elevation of the tidal flat site is generally relatively low, and a certain height of slag needs to be filled to start construction on it to form a high fill site. The consolidation and stability of the site soil and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10E02D3/046E02D3/02E02D19/18
CPCE02D3/02E02D3/046E02D3/10E02D19/18
Inventor 曾国海曾国塔李燕青
Owner 曾国海
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