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Tomofumi Koyama,Tatsuo Katayama,Tatsuya Tanaka,Yuji Kuzuha,Yuzo Ohnishi,이상환 한국자원공학회 2013 Geosystem engineering Vol.16 No.1
Grouting is commonly used to decrease the hydraulic conductivity of fractured rock masses and control the groundwater inflow. Since underground facilities are constructed in various geological conditions, different types of grout material and mixing/injection methods have been developed for effective and economical grout injection. It is also important to evaluate the grout arrival distance and the range of the altered hydraulic conductivity field after grout injection. However, the mechanism of the grout injection process has not yet been clarified sufficiently due to complex chemical and physical processes during grout injection. In this study, to simulate the grout injection process, a three-dimensional numerical model based on an equivalent continuum approach was developed and applied to the in situ grout injection tests at the Grimsel test site, Switzerland. In the simulations, the injection pressure and/or the injection rate was given as a boundary condition and the total amount of injected grout (silica sol) was calculated. The breakthrough curves (grout arrival time and the time evolution of grout density) at the observation boreholes and the distribution of the altered hydraulic conductivity field were also investigated. The simulation results were also compared with the ones obtained from in situ measurements/monitoring, which showed qualitatively good agreement.
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Yasuhiro Inaba,Yuzo Shimada,Kenji Uchiyama,Kenichi Abe,Yoshio Ishikawa,Takao Sugimoto,Yasuyuki Miyazaki,Yuzo Koyama,Shohei Onishi,Kazuo Matubara,Chikatoshi Satoh,Takao Minejima,Kaname Hirayanagi,Michi 제어로봇시스템학회 2006 제어로봇시스템학회 국제학술대회 논문집 Vol.2006 No.10