特殊隧道围岩的分级方法探讨  

Discussion on Classification Methods of Special Surrounding Rock of Tunnels

作　　者：陈寿堂[1] 吴秋军[1] 杨家熙[1] 苏鹏[1] 江黎[1] 

机构地区：[1]西南交通大学,成都610031

出　　处：《隧道建设》2011年第3期307-310,共4页Tunnel Construction

摘　　要：为探讨黄土、膨胀土、断层破碎带等特殊隧道围岩的分级方法,通过对目前国内外的研究进行总结,得到能反应特殊隧道围岩的特性的指标,采取不同的指标组合进行综合研究对其进行分级。研究认为:黄土可按地质年代、天然含水量、干密度进行分级;膨胀土可按塑性指数、自由膨胀率、标准吸湿含水率进行分级;断层破碎带可按地质力学特性进行分级。The classification methods of special surrounding rocks of tunnels in loess,swelling soil and fault and fracture zones in China and abroad are summarized.Parameters that can reflect the characteristics of the special surrounding rocks of tunnels are obtained.The study shows that loess can by classified by considering the geologic age,natural water content and dry density,swelling soils can by classified by considering the plastic index,free swelling rate and normal water content and fault and fracture zones can be classified by considering the geological and mechanical characteristics.

关 键 词：特殊围岩 分级方法 黄土 膨胀土 断层破碎带 

分 类 号：U452.12[建筑科学—桥梁与隧道工程]