岩土力学2012，Vol.33Issue(1)：209-214,219,7.
考虑脆性损伤和渗流的圆形水工隧洞解析解
Analytical solutions of circular hydraulic tunnel considering brittle damage and seepage
卞康 1肖明 2刘会波2
作者信息
- 1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071
- 2. 武汉大学水资源与水电工程科学国家重点实验室,武汉430072
- 折叠
摘要
Abstract
Considering the damage characteristic of the brittle rock, the brittle damage model is introduced; and the expression of damage variable under 3-dimension isotropic damage condition is derived. The analytical solutions of elastoplastic stress and plastic radius of the circular hydraulic tunnel are deduced, considering the seepage influence, damage influence and principal stress corresponding relations under different engineering conditions. The research about brittle characteristic shows that the plastic radius of surrounding rock will increase after considering brittle damage. The more distinct the brittle characteristic is, the more larger plastic radius will be. Whether the first principal stress of rock nearby the tunnel is radial stress or tangential stress, the consideration of seepage will expand the plastic zone of the surrounding rock. In the process of internal water pressure increase from zero, the plastic radius will gradually decrease accompany with the increase of internal water pressure, until the plastic zone disappears in the end; however, when the internal water pressure exceeds the critical pressure; the plastic zone appears again; the plastic zone will gradually increase.关键词
圆形隧洞/渗流/脆性损伤/弹塑性解Key words
circular tunnel/seepage/brittle damage/elastoplastic solution分类
建筑与水利引用本文复制引用
卞康,肖明,刘会波..考虑脆性损伤和渗流的圆形水工隧洞解析解[J].岩土力学,2012,33(1):209-214,219,7.
