不同岩石数值计算材料下的洞室稳定对比分析  

Comparative Study of the Stability of Underground Excavation with Different Model

作　　者：贾雷[1,2] 孙爱华[1,2] 郑小燕[2] 

机构地区：[1]吉林大学,长春130026 [2]北京市地质工程勘察院,北京100048

出　　处：《科学技术与工程》2012年第29期7635-7640,共6页Science Technology and Engineering

摘　　要：利用数值模拟分析软件,研究了不同岩石材料下的洞室稳定性。结果表明:(1)由于岩体屈服变形的影响,弹性材料下洞壁围岩最大主应力极值最高,弹塑性材料次之,弹脆性材料极值最低。(2)三种材料下地下洞室开挖后最小主应力量值分布基本相似,环洞壁方向量值接近于0。(3)弹性、弹塑性及弹-脆-塑性三种材料所对应的位移情况基本相同,变化规律亦基本相同。(4)洞室围岩不稳定部位,弹性模型计算时稳定系数低于1.0,弹塑性及弹-脆-塑性量值为1.0。采用数值软件模拟分析洞壁围岩稳定时,选用不同材料时应注意相应的取值。Using the numerical simulation software, the stability of underground excavation with different rock mass material was studied. Conclusions can be drawn as follows： （1） Due to the plastic deformation, the value of the maximum principal stress surrounding the tunnel is highest, flowed by elastic-plastic material, and elastic-brit- tle-plastic is low. （2） The minimum principal stress magnitude in the three materials is similar and the value close to 0. （3） The characteristics of displacement in rock mass corresponding to excavation is also basically similar. （4） The stability factor of failure rock mass surrounding excavation of elastic material is also less than 1.0, elastic- plastic and elastic-brittle-plastic large than 1.0. Using numerical simulation software to study the stability of tun- nel, the selection of different materials should pay attention to the appropriate value.

关 键 词：隧道工程 岩石材料 稳定系数 

分 类 号：TU452[建筑科学—岩土工程]