马蹄形隧洞考虑支护滞后过程的应力分析

发布时间：2018-07-01 13:29

本文选题：非圆形隧洞 + 支护滞后　；参考：《岩土力学》2014年S1期

【摘要】：基于平面弹性复变函数中的保角变换方法,推导出带有衬砌的非圆形隧洞在原始地应力作用下的应力解析解。根据衬砌内边界的应力边界条件及围岩衬砌接触面上的应力和位移连续条件,获得求解围岩和衬砌解析函数的基本方程,计算了围岩和衬砌中的应力和位移。在求解过程中,考虑了支护滞后于开挖的力学过程,并认为围岩和衬砌之间紧密接触,不会相互分开和相对滑动。以马蹄形隧洞为例,获得了围岩开挖边界和衬砌内外边界的切向应力及围岩与衬砌接触面上的接触应力分布规律,并与ANSYS数值方法结果对比,算例表明两种方法的计算结果吻合很好。
[Abstract]:Based on the conformal transformation method in the plane elastic complex variable function, the analytical solution of the stress of the non-circular tunnel with lining under the action of the original ground stress is derived. According to the stress boundary condition of lining inner boundary and the continuity condition of stress and displacement on the contact surface of surrounding rock lining, the basic equation for solving the analytic function of surrounding rock and lining is obtained, and the stress and displacement in surrounding rock and lining are calculated. In the process of solution, the mechanical process of support lagging behind excavation is considered, and the close contact between surrounding rock and lining is considered, which will not separate and slide relative to each other. Taking the horseshoe tunnel as an example, the tangential stress of surrounding rock excavation boundary and lining inner and outer boundary and the distribution law of contact stress between surrounding rock and lining contact surface are obtained, and the results are compared with the results of ANSYS numerical method. Examples show that the results of the two methods are in good agreement with each other.
【作者单位】：华北电力大学水电与岩土工程研究所;
【基金】：国家自然科学基金资助(No.11172101) 中央高校基本科研业务费专项资金资助(No.NCEPU13QN20)
【分类号】：U451

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