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Method for treating foundation consisting of liquid soil layer and soft soil mutual layer

A foundation treatment and soil layer technology, applied in soil protection, foundation structure engineering, sheet pile walls, etc., to achieve the effects of improving work efficiency, convenient construction, and simple operation

Active Publication Date: 2010-06-02
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

[0005] Technical problem: the present invention mainly aims at the problems that cannot be solved by conventional treatment methods for the interbedded foundation of liquefied soil and soft soil, and proposes a foundation treatment method for interbedded liquefied soil and soft soil. Combined construction of dense sand piles, compacted sand piles solve the liquefaction problem of the upper liquefied soil layer, and expanded diameter piles solve the bearing capacity and settlement problems of the soft soil layer

Method used

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  • Method for treating foundation consisting of liquid soil layer and soft soil mutual layer
  • Method for treating foundation consisting of liquid soil layer and soft soil mutual layer
  • Method for treating foundation consisting of liquid soil layer and soft soil mutual layer

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Embodiment Construction

[0021] The present invention organically combines the two foundation treatment methods, constructs two-way stirring variable cross-section piles first, and then constructs compacted sand piles, which not only solves the liquefaction problem of the upper liquefied soil layer, but also solves the load bearing of the soft soil layer Force and settlement issues.

[0022] This invention is mainly to organically combine the two ground treatment methods to form a new set of construction methods. The specific operation steps are as follows:

[0023] The specific operation steps are as follows:

[0024] (1) Leveling the site

[0025] (2) The two-way mixing variable cross-section piles and compacted sand-sand piles are arranged in a quincunx shape (see figure 1 )

[0026] (3) Positioning of the two-way mixing pile driver: move the two-way mixing pile driver, and align the drill bit with the pile position;

[0027] (4) Drilling down, grouting, mixing: construct a two-way mixing pile ...

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Abstract

The invention discloses a method for treating a foundation consisting of a liquid soil layer and a soft soil mutual layer, which is provided mainly for solving the problem that the foundation consisting of the liquid soil layer and the soft soil mutual layer cannot be treated by the conventional method. In the method, combined construction of bidirectional stirring variable-section piles and sand compaction piles is adopted, wherein the sand compaction piles solve the liquefaction problem of the upper liquid soil layer, and the expanded-diameter piles solve the bearing capacity and settlement problems of the soft soil layer. The method comprises the steps of: a, leveling a site; b, positioning a bidirectional stirring pile machine; c, drilling down, guniting and stirring; d, lifting; e, constructing the sand compaction piles; and f, using a composite foundation formed by the formed bidirectional stirring variable-section piles and sand compaction piles to treat the foundation consisting of the liquid soil layer and the soft soil mutual layer.

Description

technical field [0001] The invention relates to a foundation treatment method for interbedded liquefied soil and soft soil, belonging to the technical field of foundation treatment. Background technique [0002] In expressway construction, dynamic compaction and crushed stone piles are often used for the treatment of liquefied sand foundations in high seismic intensity areas, while composite foundation technologies such as mixing piles are often used for soft soil foundations, and a certain amount of design and construction experience has been accumulated. , but the treatment method for the special unfavorable foundation interbedded with liquefied sand and soft soil is still a blank. [0003] In some areas in northern Jiangsu, there are foundations where the upper part is a liquefied soil layer and the lower part is a soft soil layer. The upper liquefaction is severe liquefaction, moderate liquefaction and slight liquefaction, and the soft soil layer is saturated soft clay ...

Claims

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Application Information

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IPC IPC(8): E02D5/46E02D3/08
Inventor 杜广印刘松玉程远
Owner SOUTHEAST UNIV
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