Study of the Influence of Rock Creep on the Structure of a Tunnel'sSecondary Lining
(1 The 3rd Engineering Co., Ltd of China Railway No.12th Engineering Group Co., Ltd., Taiyuan 030024;
2 School of Civil Engineering of SouthWest JiaoTong University, Chengdu 610031)
Abstract：
Rock creep is one of the most important mechanical behaviors of rocks. Because of this, stress adjustment will continue a long time after tunnel excavation, and the load will be born jointly by the primary support and secondary lining. In the design of a tunnel, the secondary lining is usually regarded as the reserve for tunnel safety without an analysis of the effects of a creep load on the secondary lining. Therefore, it is necessary to analyze the force applied to the secondary lining and the physical condition of the secondary lining over time. Using the Nibashan Tunnel as an example, this paper analyzes the effects of creep at different times on stress redistribution of the surrounding rocks and the mechanical performances of secondary linings using Burger's model of FLAC3D.
LI Jian-Jun-1,
ZHANG Zhi-Qiang-2
.Study of the Influence of Rock Creep on the Structure of a Tunnel'sSecondary Lining[J] MODERN TUNNELLING TECHNOLOGY, 2011,V48(6): 58-64
2011, Vol. 48 