摘要
文章结合我国铁路隧道建设经验,阐述了挤压性围岩隧道的高地应力条件及挤压性围岩地质特征,提出了挤压性地层围岩级别分类的建议,并针对影响隧道初期支护变形的围岩完整程度、层厚、地质构造及地应力等地质因素进行了深入的分析,探讨了挤压性围岩隧道按相对变形、初期支护的裂损程度、软硬质岩、偏压、断面大小等因素进行分类的方法,并提出了挤压性围岩隧道的设计及大变形的系统治理技术。
Based on the experience of tunnels with high geostress conditions constructed in China, assessment criterion, geological characteristics of squeezed surrounding rock and suggestions for the rock mass classification are presented. A further analysis of geological factors of rock mass integrity, thickness, structure and geostress that affect initial support deformation is conducted, a classification method, which is based on relative deformation, the degree of cracking of the initial support, soft and hard rock, and an unsymmetrical load and section dimension, is discussed, and a design method for a tunnel in squeezed surrounding rock and systematic management techniques for large deformation are proposed.
出处
《现代隧道技术》
EI
CSCD
北大核心
2018年第1期1-6,共6页
Modern Tunnelling Technology
基金
原铁道部科研项目<复杂地质特长隧道安全施工综合技术研究>(2009G009-B)
关键词
挤压性围岩
隧道
地质特征
高地应力
初期支护
大变形
Squeezed surrounding rock
Tunnel
Geological characteristics
High geostress
Initial support
Large deformation
