Large Deformation Analysis and Control for Vertically-oriented Slate in Hadapu Tunnel
（1 China Railway No.7 Construction Bureau Group Co., Ltd.，Zhengzhou 450016;
2 Longnan Construction Headquarters of Lanzhou-Chongqing Railway Co., Ltd., Wudu 746000
3 The 3rd Engineering Co.，Ltd., China Railway No.7 Construction Bureau Group, Xi'an 710000)
Abstract：
Hadapu tunnel on Lanzhou-Chongqing railway passes through carbonaceous slate and carbonaceous shale(with local phyllite), and the strike of surrounding rocks basically parallels with the tunnel axis. High convergence deformations occurred due to large horizontal stresses during the tunnel construction. The paper describes the large deformations on vertical slate sections in Hadapu tunnel, and analyses the causes involved in terms of horizontal stresses, underground water, geostatic stresses and section type of the tunnel. Then it puts forward controlling measures such as support with high stiffness, prompt casting of secondary lining and monitoring.
ZHAO Shao-Qiang-1,
LIN An-Ning-2,
YAN Xiao-Jun-3
.Large Deformation Analysis and Control for Vertically-oriented Slate in Hadapu Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2011,V48(2): 73-77
2011, Vol. 48 