摘要
洞室开挖后围岩应力重新分布,引起围岩持续变形。修正的芬纳公式给出了无限大均匀体中轴对称圆形洞室塑性区大小的理论计算方法,该公式在地下洞室计算中得到了广泛的应用。根据修正的芬纳公式,按主应力大小不同分成两种况,分别推导出洞室周边弹塑性位移公式,分析了衬砌与围岩相互作用的机理,得出了围岩与衬砌相互作用规律,并提出了洞室支护的一些措施,为洞室衬砌设计提供指导。
After the roadway is dug,the sustained deformation is caused by the redistributed stress of surrounding rock. The modified Fenner formula, which is widely used in the calculation of underground tunnel, presents a theoretical calculation method to the size of plastic zone of axisymmetric round tunnel. Based on the modified Fenner formula, according to the difference of primary stress, the elastoplastic displacement of around tunnel is obtained, the interaction between support and surrounding rock is analyzed, the regularity of the interaction between support and surrounding rock are concluded and measures of support technology are proposed. Finally, some advices on the design of surrounding rock are provided.
出处
《建筑技术开发》
2010年第12期36-37,53,共3页
Building Technology Development
关键词
隧洞
围岩
支护
相互作用
tunnel
surrounding rock
support
interaction
