<<
[an error occurred while processing this directive] | [an error occurred while processing this directive] >>
Study of the Force Upon the Primary Support of a Loess Tunnel for a High-Speed Railway
1 China Railway No. 19th Engineering Group Ltd., Beijing 1001762 Engineering Research Center of the Education Department of Tunneling & Underground Works of Beijing, Jiaotong University, Beijing 100044
Abstract The rational design of a supporting structure is key to the design of loess tunnels with large sections. Based on a specific loess tunnel, this paper analyzes the support structure, force upon the surrounding rock, and mechanical behavior variation at different stages of support of the loess tunnel. A rational suggestion for timing the selection of primary support is given with a focus on controlled rock deformation. This paper summarizes the law of force upon the primary support of loess tunnels and comes to the following conclusions: the loess features rheological properties and the additional load induced by the rock due to this is mainly born by the support structure; and the force acting upon the support structure is asymmetrical and should be taken into consideration in the design.
Abstract：
The rational design of a supporting structure is key to the design of loess tunnels with large sections. Based on a specific loess tunnel, this paper analyzes the support structure, force upon the surrounding rock, and mechanical behavior variation at different stages of support of the loess tunnel. A rational suggestion for timing the selection of primary support is given with a focus on controlled rock deformation. This paper summarizes the law of force upon the primary support of loess tunnels and comes to the following conclusions: the loess features rheological properties and the additional load induced by the rock due to this is mainly born by the support structure; and the force acting upon the support structure is asymmetrical and should be taken into consideration in the design.
Keywords：
Cite this article:
CAO Hui-1,
WANG Qi-2,
YANG Jian-Guo-3 etc
.Study of the Force Upon the Primary Support of a Loess Tunnel for a High-Speed Railway[J] MODERN TUNNELLING TECHNOLOGY, 2012,V49(3): 83-86
2012, Vol. 49 