Numerical analysis of rock fall at Hanekleiv road tunnel

被引:9
|
作者
Mao, Dawei [1 ]
Nilsen, Bjorn [1 ]
Lu, Ming [2 ]
机构
[1] Norwegian Univ Sci & Technol NTNU, Dept Geol & Mineral Resources Engn, Trondheim, Norway
[2] SINTEF Rock Engieering, N-7465 Trondheim, Norway
关键词
Swelling clay; Tunnel; Rock fall; Rock support; Numerical analysis;
D O I
10.1007/s10064-012-0438-3
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The twin tube, 1,765 m long Hanekleiv road tunnel is located in Southeast Norway. Ten years after completion of the tunnel, a serious rock fall occurred in the southbound tube, approximately 1.1 km from the northern tunnel entrance, in a fault zone containing swelling clay. In addition to swelling, gravitational collapse due to the very low internal friction played an important role in the development of the instability. Numerical analysis has been carried out for the rock slide. Modelling based on the support actually applied indicated cracks during tunnel excavation as well as the tunnel collapse. Simulation showed that even reinforced shotcrete ribs or 25 cm thick concrete lining, based on the Q-system, may not be sufficient for the fault zone.
引用
收藏
页码:783 / 790
页数:8
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