期刊论文

Xiao, J.(jqxiao@163.com)

中文

岩石力学与工程学报

1000-6915

2013

32

12

2471-2480

国家重点基础研究发展计划（973）项目（2010CB732006） 国家自然科学基金青年科学基金项目（11002067） 河南省高等学校青年骨干教师资助计划项H（2011GGJS-144）

本校为其他机构

针对地下圆形隧道的开挖卸荷效应,基于岩石动力学和弹塑性理论,在求解其动、静态显式解析解方面进行新的尝试.首先,探讨非均匀应力场中圆形隧洞开挖卸荷的力学模型,研究初始应力的分布规律以及卸荷过程的处理方法.基于Laplace变换和留数定理,给出一种计算隧道开挖时围岩响应规律动态解析解的方法,得到线性卸荷条件下围岩应力和位移的解析表达式.其次,考虑岩体的非线性硬化和软化特性,运用弹塑性解析法,推导出围岩应力和位移的静态解析表达式.对比分析动静态解析结果的差异,结果表明:(1)卸载阶段,惯性力的存在能减少开挖卸荷对围岩的破坏,保持围岩的完整性,故而在动态解析结果中,围岩的扰动范围小...

An attempt is initiated to obtain the dynamic and static explicit solutions for the unloading effect in underground engineering based on rock dynamics and elastoplastic theory. So, the mechanical model of dynamical excavation in circular tunnel with nonuniform geostress was explored;and the distribution law of initial stress and the processing method for unloading are studied firstly. Based on the Laplace transform and residue theorem, a dynamically analytical method to calculate the behavior of surrounding rock in the condition of excavation is put forward;and the stress and deformation analy...