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Patent Searching and Data


Title:
METHOD FOR EXCAVATING TUNNEL SHAFT
Document Type and Number:
WIPO Patent Application WO/2021/088349
Kind Code:
A1
Abstract:
A method for excavating a tunnel shaft (1), by drilling a number of holes I (2) with smaller diameters, it is possible to predict groundwater and bad geology etc. in advance, which is convenient for confirming the degree of coincidence of the geological survey data, so as to provide guidance for subsequent construction and reduce construction risks and difficulties, at the same time, the excavation from top to bottom does not require the restriction of the formation of a positive hole at the bottom of the shaft (1), it can also be constructed in a non-blasting manner, which has high safety and can loosen the rock and soil in advance, improves the construction efficiency of excavation, and shortens the construction period.

Inventors:
XU QIANG (CN)
HE KAIWEI (CN)
LI QIANG (CN)
Application Number:
PCT/CN2020/090406
Publication Date:
May 14, 2021
Filing Date:
May 15, 2020
Export Citation:
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Assignee:
CHINA RAILWAY NO 2 ENG GROUP CO LTD (CN)
CHINA RAILWAY ERJU 4TH ENG CO LTD (CN)
International Classes:
E21D1/03; E21B7/00; E21D1/08
Foreign References:
CN110821497A2020-02-21
CN106194193A2016-12-07
CN105201513A2015-12-30
CN109681223A2019-04-26
CN207131404U2018-03-23
KR20060071200A2006-06-26
Attorney, Agent or Firm:
SICHUAN LIJIU LAW FIRM (CN)
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