Title:
LOW-TENSION ANCHOR CABLE CONSTRUCTION METHOD CAPABLE OF REDUCING PRESTRESS LOSS
Document Type and Number:
WIPO Patent Application WO/2019/119900
Kind Code:
A1
Abstract:
Disclosed is a low-tension anchor cable construction method capable of reducing prestress loss. According to the sequence where an ultra-quick anchoring agent (1) is jacked first and a slow-speed anchoring agent (2) is jacked thereafter, the anchoring agents are completely jacked into a drilled hole by means of an anchor cable (3) and are fully stirred, same are left to stand until the ultra-quick anchoring agent (1) has completely solidified, and tensioning is then performed by means of a tension jack and an anchor tool; and load is held for a period of time, and the tensioning is then completed. The process is completed before the slow-speed anchoring agent (2) starts to solidify. During the tensioning process, a free section of the anchor cable (3) is the longest, and the proportion of the prestress loss caused by retraction of a clip of the anchor tool is the smallest; and the prestress loss caused by the debonding and slipping of a front end of an anchoring body can be eliminated by means of load holding.
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Inventors:
ZHANG NONG (CN)
XIE ZHENGZHENG (CN)
YUAN YUXIN (CN)
XIE ZHENGZHENG (CN)
YUAN YUXIN (CN)
Application Number:
PCT/CN2018/105355
Publication Date:
June 27, 2019
Filing Date:
September 13, 2018
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21D20/00; E21D20/02
Foreign References:
| CN108104852A | 2018-06-01 | |||
| CN102116162A | 2011-07-06 | |||
| CN105134267A | 2015-12-09 | |||
| CN102337912A | 2012-02-01 | |||
| CN205172610U | 2016-04-20 | |||
| US20130064609A1 | 2013-03-14 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
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