基于3DEC的隧道开挖围岩变形特性研究  

Deformation Characteristics of Surrounding Rock During Tunnel Excavation Based on 3DEC

作　　者：高永涛[1,2] 柴金飞 吴顺川[1,2] 金爱兵[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《矿业研究与开发》2015年第8期61-66,共6页Mining Research and Development

基　　金：国家自然科学基金资助项目(51074014);中央直属高校基本科研业务费资助项目(FRF-SD-12-002A)

摘　　要：运用合适的刚度参数对实际工程进行数值计算,采用ANSYS建立基础模型导入3DEC中,克服了3DEC建模程序的固有缺陷;根据节理岩体变形参数以及孔隙水压力对结构面变形特性影响的研究结论,利用3DEC对黑山隧道在开挖过程中的变形规律进行了研究,得出浅埋破碎围岩区开挖沉降变形影响距离为60m等,与工程实际符合较好的数值模拟结果,从而为确定合理的二衬作业时机奠定了基础。The inherent defects of 3DEC modeling program were overcome,through using suitable stiffness parameters to numerically calculate the actual engineering,and importing the basic model established by ANSYS into 3DEC.And according to the research conclusions on deformation parameters of joint rock mass and the influence of pore water pressure on structure surface deformation,the deformation law was studied with 3DEC during Heishan tunnel excavation.It concluded that the influence distance of settlement and deformation in the shallow and broken surrounding rocks was60 m.The result of numerical simulation was well in accord with engineering practice,which laid a foundation to determine the suitable time for second lining.

关 键 词：隧道 3DEC 数值模拟 节理岩体 围岩变形特性 

分 类 号：TU452[建筑科学—岩土工程]