软岩隧道开挖的数值模拟与研究  

Numerical Simulation and Research of Soft-rocked Excavation

作　　者：李明[1] 贾磊[1,2] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]石家庄经济学院,河北石家庄050000

出　　处：《交通标准化》2008年第23期57-60,共4页Communications Standardization

摘　　要：采用应力释放法对某软岩隧道开挖进行二维有限元模拟,可得到不同荷载释放系数下隧道开挖后软岩隧道的多个计算参数,以及洞周围岩位移释放量与围岩应力释放量的变化关系,从而为工程设计的精确性分析和施工的及时性提供合理的依据。Stress release method is adopted to build up a 2-D finite element model simulating soft-rocked tunnel excavation, which can deduce several calculation parameters of soft-rocked tunnel after excavation under different load factor release coefficients, as well as the change relations between displacement release and stress release surrounding rock of hole. It can provide basis for the accuracy of analysis and the timeliness of the engineering design.

关 键 词：软岩隧道 弹塑性有限元 荷载释放率 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]