隧道围岩变形机制及其本构关系研究  

A Study of the Deformation Mechanisms and Constitutive Relations of a Tunnel's Surrounding Rock

作　　者：刘建友[1,2,3] 赵勇[1] 李鹏飞[1,2] 

机构地区：[1]铁道部经济规划研究院,北京100038 [2]清华大学土木工程系,北京100084 [3]中铁设计咨询集团有限公司隧道及地下工程技术研究中心,北京100055

出　　处：《现代隧道技术》2012年第6期54-61,共8页Modern Tunnelling Technology

基　　金：铁道部科技研究开发计划(2009G005隧道围岩稳定性及其控制技术)

摘　　要：隧道围岩中由于各种结构面的存在,使围岩呈现出块状、层状、碎裂、散体等结构类型,围岩结构的差异使围岩变形的力学机制多样化和复杂化。文章对各类结构围岩的变形机制进行了分析和总结,为隧道围岩的变形控制提供了理论基础。分析结果表明,完整块状围岩一般以弹性变形和塑性变形等材料变形为主,层状围岩多以岩层的弯曲变形为主,碎裂结构的围岩多以岩块的滚动、滑动变形为主,而散体结构围岩以及土砂围岩多以挤密和松弛变形为主。Because of differing structural planes in the rock masses surronnding tunnels, rock masses of different types of structures, such as massive structures, stratified structures, classic structures, and often loose consist tures. Differences between the structures makes the deformation mechanisms of a rock mass complicated and diverse Elastic deformation and plastic deformation are the main deformation mechanisms of massive rock masses, flexural deformation is the main deformation mechanism of stratified rock masses, rolling and sliding deformation is the main deformation mechanism of classic rock masses, and squeezing deformation and relaxing deformation are the main deformation mechanisms of loose rock masses.

关 键 词：隧道围岩 变形 力学机制 本构关系 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]