Negative skin friction (NSF) removing foundation treatment method

A technology of foundation treatment and negative friction resistance, applied in soil protection, infrastructure engineering, construction, etc., can solve problems such as single and backward treatment and solution methods, and achieve the goal of promoting, accelerating saturation consolidation and accelerating consolidation. Effect

Inactive Publication Date: 2014-04-23
SOUTHEAST UNIV
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  • Claims
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Problems solved by technology

[0016]Technical problem: the present invention is aimed at the newly deposited under-consolidated soil site where the negative frictional resistance effect is gradually increasing, but the treatment and solution methods are single and backward, and it is difficult to In order to effectively solve the problem of negative friction resistance ...

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  • Negative skin friction (NSF) removing foundation treatment method
  • Negative skin friction (NSF) removing foundation treatment method
  • Negative skin friction (NSF) removing foundation treatment method

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Embodiment Construction

[0045] The foundation treatment method of the present invention is a composite foundation combining loose piles and flexible piles, including loose piles and flexible piles, the loose piles and flexible piles are arranged in separate rows, and the surface of the foundation on the upper part of the loose piles and flexible piles is laid. Body pile drainage cushion.

[0046] The arrangement of the row arrangement can be that each row of loose piles and flexible piles is aligned front and back, and the overall arrangement is square; or each flexible pile is located on the center line of the line connecting two adjacent loose piles in the adjacent row Each flexible pile forms a triangular arrangement with two adjacent loose piles. Through the criss-cross combined drainage channels of loose piles and drainage cushions, the soil between the piles can be quickly drained and consolidated, so as to further reduce the consolidation settlement and negative frictional resistance effects o...

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Abstract

The invention discloses a negative skin friction (NSF) removing foundation treatment method. A method for combining discrete piles and flexible piles is used for treating NSF caused by self-weight consolidation of a soil body, gravel piles or sand-gravel piles can serve as the discrete piles, the discrete piles and the flexible piles are arranged at intervals, and gravelly soil cushions are laid on the foundation surface above the discrete piles and the flexible piles. According to the NSF removing foundation treatment method, self consolidation settlement of foundation soil is reduced by construction compaction and vibro-compaction of the discrete piles, loads can be transmitted to foundation supporting layers by the construction of the flexible piles so that stress and compressive deformation of a reinforced zone can be reduced, and 'extrusion' and 'clamping' effects can be achieved on soil among piles under the combined action of the discrete piles and the flexible piles so that consolidation settlement of the foundation soil and NSF caused by the consolidation settlement of the foundation soil can be inhibited. Meanwhile, the combined foundation treatment method can improve bearing capacity of a foundation to a large extent by drainage consolidation and substitution of the flexible piles.

Description

[0001] technical field [0002] The invention belongs to the field of special foundation treatment in geotechnical engineering, and relates to a foundation treatment method for eliminating negative friction resistance. [0003] Background technique [0004] Pile foundation has been widely used in engineering practice because of its strong adaptability to foundation soil, high bearing capacity and small settlement. In general, under the working conditions, the pile bears most of the upper load, and produces a downward displacement relative to the soil. The soil on the side of the pile provides upward resistance to the pile, which is called positive skin friction (PSR for short). However, in some cases, the soil on the side of the pile will have a downward displacement relative to the pile, thereby generating a downward side frictional resistance on the pile body, which is called negative skin friction (Negative skin friction, referred to as NSF). Due to the existence of neg...

Claims

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Application Information

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IPC IPC(8): E02D3/08
Inventor 储亚蔡国军
Owner SOUTHEAST UNIV
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