Akademik Veri Yönetim Sistemi
JOURNAL OF MINING SCIENCE, cilt.47, sa.1, ss.47-54, 2011 (SCI-Expanded, Scopus)
The studies done about shallow tunnels have been going on extensively. In the shallow tunnels especially driven in population dense areas, soil-rock problems are encountered as well as ground water. Although ground water is the most common problem, it does not take place so much in literature. During tunneling, the drainage of the groundwater is the most important point that should be considered. In some cases, the drainage of ground water through the tunnel cause ground settlements in the surrounding buildings. This problem particularly seen in weak soil/rock formations could be turned into a handicap by the surface injection applications. Sometimes, injection application to prevent settlement problem and to reinforce the ground creates risky conditions such as face burst, roof collapse during tunneling. This problematic situation risks both the work safety and the environmental safety. This study investigates retrospectively the collapse of the tunnel roof and faces burst during the construction of Izmir Metro 2nd phase. Eventually, in the zone where ground water regime exists and very weak formation is present, injection study did not seem to serve the purpose.