三维应力状态下圆筒形巷道塑性区次生应力、半径和位移  

Secondary Stress, Radius and Displacement in Plastic Zone of Cylinder Tunnel under 3-D Stress

作　　者：黄煜镔[1] 朱礼君[2] 

机构地区：[1]同济大学交通运输工程学院,上海200092 [2]广东凡口铅锌矿,广东韶关512325

出　　处：《地下空间》2004年第1期5-6,共2页Underground Space

基　　金：国家自然基金项目资助(编号:598790 12 )

摘　　要：现有的圆筒形巷道塑性区次生应力、半径和位移的理论解是基于Mohr Coulomb准则推导而得 ,但是Mohr Coulomb准则没有考虑中间主应力的影响。为此本文利用双剪强度理论分析了三维应力状态下圆筒形巷道塑性区次生应力、半径和位移。计算表明圆筒形巷道在三维应力状态下塑性区半径和位移比二维应力状态下更小 ,据此可充分发挥岩体自身的承载能力 。At present, the theoretical solution of sec ondary stress, radius and displacement in plastic zone of cylinder tunnel is derived on basis of Mohr-Cou l omb criterion, in which the influence of intermediate main stress is not taken i nto consideration. In this paper, the secondary stress, radius and displacement in plastic zone of cylinder tunnel under 3-D stress are analyzed on basis of do u ble shear strength theory. The results of calculation show that the radius and d isplacement in plastic zone of cylinder tunnel under 3-D stress are less than t h ose under 2-D stress, therefore, the bearing capacity of the rock itself could be utilized fully, and it has great significance to the rock engineering.

关 键 词：圆筒形巷道 塑性区 三维应力 次生应力 半径 位移 双剪强度 

分 类 号：TD313[矿业工程—矿井建设]