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一、前言近代各种军用或民用的地下建筑群的构筑向人们提出了进行地下结构系统的力学分析问题,以达到经济、安全的目的。对于平行隧道相互影响的研究是其中一具有实际意义、但目前尚未很好解决的基本问题。对此,国内外曾进行了较多的现场量测工作;国内铁路、水利、人防等部门的工程设计规范亦根据经验制定了相应规定。在理论分析方面,对于无衬砌平行洞室、平行水工隧洞(承受均匀内水压力)的应力分析已有若干解析解。目前对于多洞室的应力分析,较多采用有限元等数值法。本文应用复变函数方法得到了任意侧压力系数的弹性地层中平行圆形隧道应力分析解析解,其中考虑了开挖面三维效应、衬砌与洞壁间的施工间隙等因素。可用之计算围岩二、三次应力场和衬砌界面力及内力。
I. INTRODUCTION The construction of various military or civilian underground buildings in modern times puts forward the problem of mechanical analysis of underground structural systems in order to achieve economic and security objectives. The research on the mutual influence of parallel tunnels is one of the basic issues that has practical significance but is not yet well resolved. In response to this, more on-site measurement work has been conducted at home and abroad; the engineering design specifications of the domestic railway, water conservancy, civil air defense, and other departments have also formulated corresponding regulations based on experience. In terms of theoretical analysis, several analytical solutions have been obtained for stress analysis of unlined parallel tunnels and parallel hydraulic tunnels (understand uniform internal water pressure). At present, for the stress analysis of multi-holes, numerical methods such as finite element method are more often used. In this paper, the analytical solution of the parallel circular tunnel stress analysis in an elastic stratum with arbitrary lateral pressure coefficients is obtained by using the complex variable method. The three-dimensional effect of the excavation surface and the construction gap between the lining and the cave wall are considered. It can be used to calculate the second and third stress fields and lining interface forces and internal forces of surrounding rock.