摘要
在分岔隧道施工过程中,小间距段支护体系力学性态直接反映分岔隧道的稳定状况,结合沪—蓉线庙垭分岔隧道,对小间距中墙薄弱处侧向加固进行了理论分析,通过对围岩变形和围岩压力、钢支撑内力、锚杆轴力等支护体系监测成果的系统分析,以及中墙爆破振动现场试验研究,评判了小间距隧道的稳定状况,所得结论可为日后同类工程的设计、施工、监测提供有益的借鉴。
The mechanical behavior of supporting system for closely adjacent tunnels is the direct indication of its safety in the excavation of diverging tunnels;combined practical work of Miaoya diverging tunnel with small interval in Hu-Rong Expressway, the lateral reinforcement theory of inter-space rock and site monitoring of closely adjacent tunnels are introduced;based on the results,the deformation of surrounding rock and mechanical behavior of supporting system are presented;together with the study on the field experiments for blasting vibration of inter-space rock,the stability of closely adjacent tunnels is evaluated;and the conclusions obtained will devote to the following studies.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第S1期333-338,共6页
Rock and Soil Mechanics
基金
国家自然科学基金重点项目(No.50379052)
国家自然科学基金面上项目(No.50574053)
关键词
分岔隧道
小间距
支护性态
监测分析
diverging tunnel
closely adjacent tunnels
mechanical behavior of supporting system
site monitoring analysis
