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http://dx.doi.org/10.14481/jkges.2017.18.6.5

A Study on the Impermeable Effect by Grouting in the Subsea Tunnel  

Kim, Seunghwan (Geotechnical Department, Dream ENG Co., Ltd.)
Lim, Heuidae (Department of Civil Engineering, Chungnam National University)
Yoon, Seongmin (Geotechnical Department, Dream ENG Co., Ltd.)
Publication Information
Journal of the Korean GEO-environmental Society / v.18, no.6, 2017 , pp. 5-19 More about this Journal
Abstract
In this study, the effect of rock mass curtain grouting was investigated by analyzing the correlation between the parameters of the RMR & grout injection volume, Lugeon value & RQD, Lugeon value & cement injection volume. In order to investigate the effect of rock mass curtain grouting, we analyzed the grout injection volume of 315 curtain grouting holes at 9 tunnel face of NATM Subsea tunnels in gneiss area. The total grout injection volume in the Subsea tunnels study was slightly changed in some tunnels face but decreased with increasing the rating of parameters in spacing of discontinuity (R3, Js) and groundwater condition (R5). The geological anomalies of seismic survey (3D, TSP) and the inflow of probe hole were found to be more correlated of relative than the parameters of RMR. The unit injection volume was found to decrease with higher ratings in the parameters of the RMR except the weathering degree of the discontinuity (Jc, R4). The correlation between RQD and Lugeon values is not significant, but it can be confirmed that the Lugeon value tends to decrease as the RQD value increases.
Keywords
Subsea tunnel; Curtain grouting; Lugeon value; RMR; Injection volume;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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