Simulation of Stress Concentration and Drilling Relief of Deep Tunnel Boring Face

Abstract:

Using the numerical analysis software FLAC3D, the stress concentration and drilling relief on the boring face of deep tunnel were analyzed through three dimensional numerical simulations, in which, the characteristics of stress concentration area distribution and the effect of depth on the stress concentration were the main works. The stress relief through drilling was also simulated. Through above studies, the results show that drilling is a very effective method to relief the concentrated stress. But the drilling layout, such as numbers of drilling, should be rational. Generally, the deeper the tunnel buried, the greater the degree of stress concentration, and more number of boreholes are required. All results in this paper provide a reference for the actual projects.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 1362-1365
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.1362
• Online since: October 2012
• Authors: Zhi Tao Ma, Tong Xu Wang, Sai Jiang Liang
• Keywords: Deep Tunnel, Numerical Simulation, Stress Concentration, Stress Drilling Relief

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