Unified semi-analytical solution for elastic-plastic stress of deep circular hydraulic tunnel with support yielding
来源期刊：中南大学学报(英文版)2013年第6期
论文作者：ZENG Kai-hua(曾开华) XU Jia-xiong(许家雄)
文章页码：1742 - 1749
Key words：unified strength theory (UST); intermediate principal stress; support yielding; choice of major principal stress
Abstract: A unified semi-analytical solution is presented for elastic-plastic stress of a deep circular hydraulic tunnel with support yielding under plane strain conditions. The rock mass is assumed to be elastic-perfectly plastic and governed by the unified strength theory (UST). Different major principal stresses in different engineering situations and different support yielding conditions are both considered. The unified solution obtained in this work is a series of results, rather than one specific solution, hence it is suitable for a wide range of rock masses. In addition, parametric study is conducted to investigate the effect of intermediate principal stress. The result shows the major principal stress should be rationally chosen according to different engineering conditions. Finally, the applicability of the unified solution is discussed according to the critical pressures.
ZENG Kai-hua(曾开华), XU Jia-xiong(许家雄)
(Department of Civil Engineering, Nanchang Institute of Technology, Nanchang 330099, China)
Abstract:A unified semi-analytical solution is presented for elastic-plastic stress of a deep circular hydraulic tunnel with support yielding under plane strain conditions. The rock mass is assumed to be elastic-perfectly plastic and governed by the unified strength theory (UST). Different major principal stresses in different engineering situations and different support yielding conditions are both considered. The unified solution obtained in this work is a series of results, rather than one specific solution, hence it is suitable for a wide range of rock masses. In addition, parametric study is conducted to investigate the effect of intermediate principal stress. The result shows the major principal stress should be rationally chosen according to different engineering conditions. Finally, the applicability of the unified solution is discussed according to the critical pressures.
Key words:unified strength theory (UST); intermediate principal stress; support yielding; choice of major principal stress
