Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Ozaki, Yusuke; Ishibashi, Masayuki; Onoe, Hironori; Iwatsuki, Teruki
no journal, ,
We perform a prediction analysis of the Groundwater Recovery Experiment in Tunnel (GREET) that is an ongoing experiment project in Mizunami Underground Research Laboratory for undearstanding of geoenvironmental recovery after closure of subsurface facility. The hydro-mechanical-chemical coupled behavior of subsurface environment during the excavation of research tunnel for GREET is simulated. For this prediction study, we build a hydrogeological model based on information of fracture with Discrete Fracture Network model. The model is converted to equivalent continuous porous model (ECPM) for Finite Element modelling. We compare the predicted results of drawdown of hydraulic pressure, inflow into tunnel and variation of Cl concentration during excavation.
Ozaki, Yusuke; Onoe, Hironori; Iwatsuki, Teruki
no journal, ,
In the Mizunami Underground Research Laboratory, Groundwater REcovery Experiment in Tunnel (GREET) is performed as a part of development of backfilling technologies. In GREET, water pressure, displacement of bedrock, water quality, etc. are monitored in and around the test drift to capture the disturbance and recovery process of geological environment by excavation and closure of the test drift. In addition to in-situ data acquisition, numerical simulation is performed to enhance the understanding of the coupled process. In this study, we demonstrate the results of coupled simulation of excavation of the test drift.