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Technology for treating deep soft soil foundation through vacuum preloading of low-permeability solidified soil composite film

A low-permeability, soft-soil foundation technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of large settlement of drainage channels, difficult maintenance of high vacuum, and rapid aging, so as to reduce the treatment cost and improve the overall Bearing capacity, effect of controlling post-construction settlement

Pending Publication Date: 2022-05-13
曾国海
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Problems solved by technology

However, the plastic vacuum film vacuum preloading technology also has disadvantages such as rapid aging of the vacuum film after long-term high-intensity use, difficulty in maintaining high vacuum after loading, and large settlement of drainage channels after construction.

Method used

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Embodiment Construction

[0051] In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

[0052] In order to achieve the above purpose, a low-permeability solidified soil composite membrane vacuum preloading technology for deep and thick soft soil foundation is provided.

[0053] Include the following steps:

[0054] Step 1 Lay out the vacuum system:

[0055] Step 1-1, the site is cleared and leveled, and the vacuum unit block is set out;

[0056] Step 1-2, laying sand cushion;

[0057] Step 1-3, mechanically beat the drainage board to the design depth;

[0058] Step 1-4, laying the first layer of plastic vacuum film, laying 1 layer of geotextile on the c...

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Abstract

The invention relates to the technical field of soft soil foundation treatment, and particularly discloses a technology for treating a deep soft soil foundation through vacuum preloading of a low-permeability solidified soil composite film. Then sequentially carrying out the operations of plastic film vacuum prepressing, first-layer solidified soil loading, second-layer plastic vacuum film laying, second-layer solidified soil loading and site sealing; high-vacuum preloading in the whole soft foundation treatment process is achieved, the solidified soil and plastic film composite film sealing technology is adopted, after stacking loading is conducted on the film, the vacuum under the film is stabilized to be 85 kpa or above, and the problem that the vacuum degree is sharply attenuated after stacking loading is conducted through a traditional vacuum degree technology is solved; by the adoption of the vacuum preloading technology, the total load can reach 120 kpa or above, and compared with a traditional vacuum preloading technology with the same stacking height, the total preloading load of the vacuum preloading technology is larger by 20% or above.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation treatment, in particular to the technology of low-permeability solidified soil composite film vacuum preloading treatment of deep soft soil foundation. Background technique [0002] The silted soft soil (silt and clay) is widely distributed in the tidal flat area along the coast. The overall characteristics of this kind of soft soil are high moisture content, strong compressibility, low bearing capacity, and extremely poor engineering physical and mechanical properties. Generally, the elevation of the site in tidal flat areas is relatively low, and the site needs to be filled for development and construction to meet the needs of flood control and urban construction. In the development and construction of highly filled tidal flat areas, the problem of dealing with the deep and thick soft soil foundation under the site must first be solved. [0003] In the existing technology, the comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D3/02E02D3/10
CPCE02D3/00E02D3/02E02D3/10
Inventor 曾国海曾彦文李燕青曾国塔
Owner 曾国海
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