【摘要】 利用复变函数解析法,在拟静力条件下对触地爆炸长波作用下坑道周边围岩进行了应力分析,得出了不同侧压力系数下坑道周边的应力分布状态,结果显示最大应力值出现在侧墙底脚处、其次为拱肩处,拱顶的最大应力值随着侧压力系数的增大明显增大,并与拱肩的应力值相近。另外,通过有限元数值模拟软件模拟了六种侧压力系数下坑道破坏的形态,破坏形态与理论计算结果吻合较好,对实际工程中围岩的支护和锚固设计有一定的参考价值。更多还原

【Abstract】 In the light of the complex function analytic method,a stress analysis is made of the surrounding rock of a tunnel under the action of long-wave explosion in the quasi-static conditions,upon the basis of which the states of stress distribution around the tunnel with different lateral coefficients are obtained.The results show that the maximum value of stress appears at the foot of the side wall and then at the spandrel.The value of the maximum stress at the vault increases obviously with the increase in the coefficients of lateral pressure,which is close to the value of stress at the spandrel.Besides,the finite element software is used to simulate the failure mode of the tunnel with six coefficients of lateral pressure.The failure modes are found to fairly well agree to the results of the theoretical calculations.The results of the research may be of some useful referential value for surrounding rock support and the design of anchoring.更多还原