基于剪切滑移的圆形洞室应力状态研究  

Research on stress state of circular openings based on shearing slip

作　　者：李杰[1] 李文培[1,2] 施存程[1,3] 王德荣[1] 范鹏贤[1] 

机构地区：[1]解放军理工大学爆炸冲击防灾减灾国家重点实验室,南京210007 [2]海军工程设计研究局,北京100070 [3]第二炮兵指挥学院五系,武汉430012

出　　处：《岩土力学》2012年第11期3271-3277,共7页Rock and Soil Mechanics

基　　金：国家自然科学杰出青年基金(No.50825403);国家重点基础研究发展计划(973计划)项目(No.2010CB732003);国家自然科学创新研究群体科学基金(No.51021001);水利部公益性行业科研专项项目(No.201001009)

摘　　要：引入一种基于滑移线上非线性本构关系的圆形洞室计算模型,并从这个模型推导得出洞室开挖后应力状态的非连续表达式。在该表达式中围岩的应力分区以及其中的应力值由一个不定的荷载参数控制。通过引入边界条件的方法确定荷载参数,解决了荷载参数不确定的问题。从围岩的应力分布状态确定荷载参数的取值范围,并计算得到不同荷载参数范围内围岩应力分布曲线。将围岩应力状态的解析解与局部剪切应变二维有限元程序的数值解进行比较验证,一致性较好。A computation model of circular openings based on nonlinear constitutive relationship along slip lines is introduced.Discontinuous expressions for stress state around the openings after excavation are deduced based on the model.Distributions and values of stresses in surrounding rock are controlled by a uncertain load parameter,which could be determined by introducing a boundary condition.Stress distribution curves of surrounding rock in different ranges of the load parameter are obtained,where the ranges of the load parameter are determined by stress state in surrounding rock.The discontinuous analytical solutions of surrounding rock stress state are consistent with the numerical solutions of two dimensional finite element code for local shear strain.

关 键 词：圆形洞室 非连续 解析解 滑移线 

分 类 号：TU45[建筑科学—岩土工程]