Effects of intermediate principal stress on the displacement around tunnels in visco-elastoplastic rock

被引：0
|
作者：
Xiaoli, Y. [1 ]
Linrong, X. [1 ]
Liang, L. [1 ]
Baochen, L. [1 ]
机构：
[1] Civil Architectural Eng. Coll., Central South University, Changsha 410075, China
来源：
Geotechnical Engineering | 2002年 / 33卷 / 02期
关键词：
Computer simulation - Creep - Failure (mechanical) - Model structures - Strain measurement - Stress analysis - Structural analysis - Tunnels;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
To evaluate the effects of intermediate principal stress on the displacement around tunnels, this paper discusses the problem using a unified yield criterion and a non-associated flow rule. The time-dependent behavior is simulated by Kelvin model, consisting of a spring and a cohesive element with parallel connection. The effects of dilatancy and creep of rock are considered in the solution. The general tunnel engineering analysis is characterized by the usage of Mohr-Coulomb (MC) or Hoek and Brown yield criterions that neglect the effects of intermediate principal stress. The unified strength theory, with intermediate principal stress on failure surface concerned, is applied to tunnel engineering. It has been shown that the displacement around tunnels using linear MC criterion, a special case of those in the paper, may be overestimated in rock.
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页码：87 / 92
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