Coral sand foundation pile using expansion agent and construction method

A technology of expansion agent and coral sand, which is applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of increasing effective pressure of coral sand particles, reducing coral sand pore water pressure, and unqualified projects, so as to improve the side The effect of wall friction resistance, meeting the bearing requirements, and improving strength
CN113174925BActive Publication Date: 2022-06-21CHINA THREE GORGES UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA THREE GORGES UNIV
Publication Date
2022-06-21

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Abstract

The invention provides a novel coral sand foundation pile using an expansion agent and a construction method. Carrier piles are uniformly buried inside the coral sand foundation, and the pile bottom of the carrier pile is provided with a lower compacted filling material area; the lower part The expansion agent is filled inside the tamping filler area to form a bottom expansion head structure; the outer wall of the carrier pile is provided with a plurality of side wall extension expansion head branches, and the interior of the side wall extension expansion head branches is filled with expansion agent and Magnetic mortar, and an electromagnet device for controlling the fluidity of the magnetic mortar is arranged inside the branch of the side wall extension expansion head. In this method, expansion agent is added to the expansion area at the bottom of the carrier pile and the branch area of ​​the extension head of the side wall to make it expand, extrude the coral sand around the pile, increase the density of the coral sand, reduce the pore water pressure of the coral sand, and the coral sand particles The effective pressure will increase.
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Description

technical field

[0001] The invention relates to a coral sand foundation pile using an expansion agent and a construction method, which is particularly suitable for the pile foundation construction of a coral sand foundation with a macropore structure, and belongs to the technical field of pile foundation construction. Background technique

[0002] Sand liquefaction refers to loose saturated sand below the water table, which tends to become tighter when subjected to vibration. However, the pores of the saturated sand are all filled with water. Therefore, this tightness will lead to a sudden increase in the pore water pressure, and in the short period of the earthquake process, the suddenly increased pore water pressure has no time to dissipate, which makes the original The pressure (effective pressure) transmitted by the sand particles through their contact points is reduced. When the effective pressure disappears completely, the sand layer will completely lose its shear stre...

Claims

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