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结合复变函数理论求解弹性力学平面带孔洞问题的优势,以及交替法简单的重复循环计算步骤,成功地解决了半无限平面内双孔平行圆形隧道开挖的弹性问题,并且借助于计算机编程,获得了隧道开挖后围岩的应力场和位移场。从附加面力的逼近精度、迭代计算的收敛度以及洞周位移三个不同的方面,对计算精度进行了讨论。此外,通过工程实例分析,将现场实测的单孔和双孔隧道施工后产生的地表沉降值与理论计算结果相比较,发现两者吻合较好,其中地表产生的最大沉降值的计算结果与实测值的误差不超过5%。
Combined with the theory of complex function to solve the problem of hole with elastic mechanics, and the simple repeat cycle calculation of alternating method, the elastic problem of double parallel circular tunnel excavation in semi-infinite plane is solved successfully. With computer programming , The stress field and displacement field of surrounding rock after tunnel excavation were obtained. The accuracy of the calculation is discussed from three aspects: the approximation accuracy of additional surface force, the convergence of iterative calculation and the displacement of the cavity. In addition, through the engineering example analysis, comparing the surface settlement value produced by the on-site measured single-hole and double-hole tunnel construction with the theoretical calculation results, it is found that the two agree well with each other, and the calculation result of the maximum settlement value generated on the ground surface and the measured The value of the error does not exceed 5%.