本文選題：非圓形隧洞 + 支護滯后��； 參考：《巖土力學》2014年S1期

【摘要】：基于平面彈性復變函數(shù)中的保角變換方法,推導出帶有襯砌的非圓形隧洞在原始地應力作用下的應力解析解。根據(jù)襯砌內(nèi)邊界的應力邊界條件及圍巖襯砌接觸面上的應力和位移連續(xù)條件,獲得求解圍巖和襯砌解析函數(shù)的基本方程,計算了圍巖和襯砌中的應力和位移。在求解過程中,考慮了支護滯后于開挖的力學過程,并認為圍巖和襯砌之間緊密接觸,不會相互分開和相對滑動。以馬蹄形隧洞為例,獲得了圍巖開挖邊界和襯砌內(nèi)外邊界的切向應力及圍巖與襯砌接觸面上的接觸應力分布規(guī)律,并與ANSYS數(shù)值方法結(jié)果對比,算例表明兩種方法的計算結(jié)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.
【作者單位】： 華北電力大學水電與巖土工程研究所;
【基金】：國家自然科學基金資助(No.11172101) 中央高校基本科研業(yè)務費專項資金資助(No.NCEPU13QN20)
【分類號】：U451

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