高地应力软岩条件下挤压变形预测及应用  

Squeezing Deformation Prediction of Soft Rocks under High Ground Stress and its Application

作　　者：胡元芳[1] 刘志强[1] 王建宇[1] 

机构地区：[1]中铁西南科学研究院有限公司,成都610031

出　　处：《现代隧道技术》2011年第3期28-34,共7页Modern Tunnelling Technology

基　　金：铁道部科技研究开发计划项目(2009G005-D)

摘　　要：近年来,穿越高地应力区且工程地质环境恶劣的软弱围岩长大隧道工程不断涌现,其不同程度围岩"大变形"问题给施工设计造成了很大困难。从研究软弱围岩隧道"大变形"分类、挤压变形分级出发,利用现场试验对隧道岩体强度进行估算,并采用Hoek方法对挤压变形进行判定及量值估算,其研究成果应用于正在修建的兰渝线木寨岭隧道斜井工程中加以验正,结果与现场实测数据规律基本一致。In recent years,more and more long tunnels with large profile are constructed in soft rocks under high ground stress and adverse geological conditions,resulting in great difficulties in design and construction due to various degree of ＂large deformation＂of surrounding rocks.Authors of the paper estimated rock mass strengths of tunnels by means of in-situ tests based on the classification of rock mass deformations and grading of squeezing deformations,assessed squeezing deformations and evaluated qantitative deformation magnitudes by adopting Hoek method.This technique has been applied to the inclined shaft project of Muzhailing tunnel on Lanzhou-Chongqing railway under construction,results acquired basically complied with the measured data.

关 键 词：木寨岭隧道 挤压变形 高地应力 Hoek 方法 变形预测 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]