Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR DETERMINING SAFETY OF SUBWAY FRACTURE ZONE AFTER CURTAIN GROUTING
Document Type and Number:
WIPO Patent Application WO/2021/244674
Kind Code:
A1
Abstract:
Provided is a method for determining the safety of a subway fracture zone after curtain grouting, comprising the following steps: determining the equivalent radius dp of a fracture zone on a plane; determining the calculated equivalent radius D of a contact zone p; determining the buried depth z1 of the groundwater level in an intrusive contact zone and the distance z2 from the groundwater level to the top of the subway; determining the unit weight γ of the soil above the groundwater level and the saturated unit weight γsat of the soil below the groundwater level γ in the intrusive contact zone; determining the slip force G of the intrusive contact zone due to gravity; determining the undrained shear strength cu of the soil in the intrusion contact zone; determining the thickness of the grouting zone dz; determining the shear strength of the grouting body cc; determining the resistance K of the grouting body; determining the safety factor at which, after the contact zone is grouted, slippage and collapse will not occur; if SF ≥ 1.0, slippage and collapse will not occur; otherwise, if SF < 1.0, slippage and collapse will occur.

More Like This:
JPH06257377TUNNEL CONSTRUCTION METHOD AND DEVICE THEREFOR
JP2008214855REINFORCEMENT CONSTRUCTION METHOD FOR TUNNEL WORKING FACE AND WORKING FACE REINFORCEMENT MEMBER
JP2817076INDUSTRIAL APPLICABILITY: A method for predicting geology in front of a face during tunnel excavation.
Inventors:
GAO YAN (CN)
HE CHANGJIANG (CN)
MENG QINGYI (CN)
WANG JUNHOU (CN)
QIAN KUN (CN)
LIU YUNSHENG (CN)
LI FEI (CN)
YIN ZITAO (CN)
JIAO YONGYAN (CN)
LI DEZHU (CN)
Application Number:
PCT/CN2021/109422
Publication Date:
December 09, 2021
Filing Date:
July 30, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CHINA RAILWAY NO 9 GROUP CO LTD (CN)
International Classes:
E21D9/00
Domestic Patent References:
WO2019124935A12019-06-27
Foreign References:
CN111878094A2020-11-03
CN110631918A2019-12-31
CN108918823A2018-11-30
CN108520113A2018-09-11
CN102003191A2011-04-06
CN107909255A2018-04-13
CN104880544A2015-09-02
Attorney, Agent or Firm:
BEIJING WUZHOUYANGHE & PARTNERS (CN)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: METHOD FOR PREDICTING EMERGENCY-RESPONSE PIPE-PUSHING THRUST FOR SUBWAY TUNNEL COLLAPSE

Next Patent: SUBWAY COLLAPSE EMERGENCY MANAGEMENT SYSTEM AND METHOD FOR IMPLEMENTATION THEREOF