地下高压岔管洞室稳定及衬砌损伤开裂分析

Analysis on Stability of Surrounding Rock and Damage Fracture of Concrete Lining for Underground High Pressure Branch Pipes

根据围岩和混凝土破坏原理，提出了围岩和混凝土损伤开裂的三维非线性有限元计算方法．给出了混凝土衬砌开裂后裂缝宽度的估算公式，并对实际工程进行了分析计算．探讨了高压岔管受力和破坏的一些基本特性．

A Computational method of non-linear three-dimensional damage fracture FEM is presented for underground opening and concrete lining.According to the characteristic of concrete failure,the calculational formula of crack width for concrete lining is given.Some basic regulations on loading and failure of underground high pressure branch pipes are obtained by analyzing an engineering example.