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Title:
DOUBLE-HELICAL PIPE FOR REINFORCING SOFT AND WEAK SOIL BODIES, GROUTING AND PILE-FORMING DEVICE, AND CONSTRUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/095291
Kind Code:
A1
Abstract:
A double-helical pipe for reinforcing soft and weak soil bodies, a grouting and pile-forming device, and a construction method therefor. The double-helical pipe comprises an outer helical pipe (1) and an inner helical pipe (2); the outer helical pipe (1) and the inner helical pipe (2) are nested and fixed together, the top of the outer helical pipe (1) is connected to the top of the inner helical pipe (2) in a sealed manner, the inner space of the inner helical pipe (2) forms a grouting cavity (9), the space between the outer helical pipe (1) and the inner helical pipe (2) forms a water discharge and liquid delivery cavity (10), and the pipe body of the outer helical pipe (1) is provided with several water discharge and liquid delivery holes (11). The grouting and pile-forming device further comprises a cabin tank (4). A construction method of a grouting and pile-forming device for reinforcing soft and weak soil bodies, comprising the following steps: 1) operation preparation; 2) forward-direction helical downward penetration; 3) water discharge and consolidation; 4) chemical consolidation; 5) reverse-direction helical rising; and 6) repeating operations until all soil bodies to be reinforced are processed. The grouting and pile-forming device has an ingenious structure, is easy and flexible to operate, and has a wide application range and high reliability.

Inventors:
CHEN XUGUANG (CN)
LU GUANGKUN (CN)
ZHANG NING (CN)
WAN YONG (CN)
Application Number:
PCT/CN2021/074927
Publication Date:
May 12, 2022
Filing Date:
February 02, 2021
Export Citation:
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Assignee:
OCEAN UNIV CHINA (CN)
International Classes:
E02D15/04; E02D5/34
Foreign References:
CN102995622A2013-03-27
JP6664648B12020-03-13
CN111648347A2020-09-11
CN109826189A2019-05-31
CN204185844U2015-03-04
JP2014152447A2014-08-25
US4018056A1977-04-19
CN104131555A2014-11-05
CN102330424A2012-01-25
CN107237311A2017-10-10
CN210975794U2020-07-10
CN106337413A2017-01-18
Attorney, Agent or Firm:
BEIJING ZQLH INTELLECTUAL PROPERTY OFFICE (CN)
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