Double-spiral-tube structure, grouting and pile forming device and construction method for strengthening soft soil

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United States of America Patent

PATENT NO 11525231
APP PUB NO 20220251794A1
SERIAL NO

17728998

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Abstract

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A grouting and pile forming device includes a compartment box and a double-spiral-tube structure. The double-spiral-tube structure includes an outer spiral tube and an inner spiral tube, which are nested and fixed together. A top part of the outer spiral tube and a top part of the inner spiral tube are hermetically connected. An inner space of the inner spiral tube forms a grouting cavity. A space between the outer spiral tube and the inner spiral tube forms a drainage and delivery cavity. A plurality of drainage and delivery holes are provided in a tube body of the outer spiral tube. A construction method for strengthening soft soil through the grouting and pile forming device includes the following steps: 1) operation preparation; 2) downward spiral penetration; 3) drainage consolidation; 4) chemical consolidation; 5) upward spiral lifting; and 6) repeated operation until all soil to be strengthened is treated.

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Patent Owner(s)

  • OCEAN UNIVERSITY OF CHINA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Xuguang Qingdao, CN 8 17
Lu, Guangkun Qingdao, CN 2 1
Wan, Yong Qingdao, CN 34 124
Zhang, Ning Qingdao, CN 494 4310

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