Numerical analysis of rock fall at Hanekleiv road tunnel
Numerical analysis of rock fall at Hanekleiv road tunnel
复制标题
DOI：
10.1007/s10064-012-0438-3
复制
发表时间：
2012-09
影响因子：
4.2
通讯作者：
D. Mao;B. Nilsen;Mingxu Lu
中科院分区：
文献类型：
--
作者：
D. Mao;B. Nilsen;Mingxu Lu
哈内克列夫公路隧道（Hanekleiv Road Tunnel）全长1,765米，位于挪威东南部。隧道建成10年后，南行管道发生严重落石，距离北方隧道入口约1.1公里，位于含有膨胀粘土的断层带。除了膨胀，由于非常低的内部摩擦引起的引力坍缩在不稳定性的发展中发挥了重要作用。对岩滑进行了数值分析。基于实际应用的支撑的建模表明隧道开挖期间的裂缝以及隧道坍塌。模拟表明，即使是钢筋喷射混凝土肋或25厘米厚的混凝土衬砌，基于Q系统，可能不足以为断层带。
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.