摘要
针对黄土隧道施工过程中遇到的软弱地质带问题开展了研究。首先,分析了黄土软弱地质带的形成机理。其次,依据黄土软弱地质带的形成机理,采用有限差分数值分析方法分析了黄土隧道穿越软弱地质带隧道可能的破坏形式。最后,根据该破坏形式提出了黄土隧道穿越软弱地质带的超前加固处理措施,并分析了处理后的效果。分析结果表明:黄土软弱地质带形成原因主要有水流下浸、水流上浸和土岩交界面3种形式;如果采用合理的超前加固措施,在黄土隧道穿越软弱地质带的施工过程中能实现成功的穿越。
Some problems of weak geological zone encountered in loess tunnel construction are researched. First, the formation mechanism of loess weak geological zone is analyzed. Second, based on the formation mechanism of loess weak geological zone, the potential failure modes of loess tunnel in weak geological zone are analyzed by finite difference numerical method. Finally, based on the potential failure mode, the advanced support measures are proposed and the effect of the advanced support is analyzed. The results show that （ 1 ） there are 3 formation modes of weak geological zone, i. e., water infiltration, groundwater rise and the interface of loess and rock ; （2） the reasonable advanced support measures are reliable when the problems of weak geological zone are encountered in loess tunnel construction.
出处
《公路交通科技》
CAS
CSCD
北大核心
2014年第3期101-105,共5页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(50779054)
贵州省自然科学基金项目(黔科合J字LKB[2012]13号)
贵州省教育厅自然科学重点项目(黔教合KY字(2013)179号)
关键词
隧道工程
黄土隧道
超前支护
软弱地质带
tunnel engineering
loess tunnel
advanced support
weak geological zone
