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http://dx.doi.org/10.9720/kseg.2019.2.113

Evaluation of Groundwater Level Decline and Water Quality Due to Tunnel Excavation  

Kim, Min Gyu (Department of Land, Water and Environment Research, KICT)
Kim, Minsoo (Daelim Industrial Co. Ltd.)
Jeong, Gyocheol (Department of Earth and Environmental Science, Andong National University)
Lee, Jeongwoo (Department of Land, Water and Environment Research, KICT)
Chung, Il-Moon (Department of Land, Water and Environment Research, KICT)
Publication Information
The Journal of Engineering Geology / v.29, no.2, 2019 , pp. 113-122 More about this Journal
Abstract
In this study, the flow analysis to evaluate the extent of groundwater decline and the effect of the small valleys caused by the decrease of groundwater level in the construction of road tunnel, and the pollutant movement analysis to evaluate pollution of nearby water source by pollutant discharge during tunnel construction, respectively. The decrease of the groundwater during the 30 month tunnel excavation period was maximum 27 m and it was found to be the largest within 50 m from the tunnel center. The flow of groundwater is shown in the form of flowing into the tunnels and the effects of groundwater level decline were observed up to a tunnel radius of 200 m. As a result of the numerical modeling of the contaminant transport to examine the influence of the polluted water discharge from the tunnel, the range of the turbid water generated at the end of the tunnel is up to 120 m and it is estimated that the risk of contamination of the small river is not large.
Keywords
tunnel excavation; groundwater level drawdown; contaminant transport; effective distance;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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