摘要
海底隧道开挖时采用注浆加固措施,可显著减小隧道涌水量、降低衬砌背后水压力,而其关键在于合理地确定注浆圈参数。通过理论计算和分析,得出注浆圈参数变化对隧道涌水量的影响规律;利用安全系数法,采用Flac软件对围岩稳定性进行数值模拟分析,得出围岩稳定的安全范围。在此基础上提出应从隧道涌水量的大小和围岩稳定性2方面综合考虑确定注浆加固圈的参数。
When excavating undersea tunnel, grouting reinforcement is adopted, which may obviously reduce tunnel water inflow, reduce rear water pressure of masonry, and the key to solve these two issues would be in rationally determine grouting rim parameters. With theoretical calculation and analysis, the rule of influence by grouting rim parameter changes to tunnel water inflow is obtained; By utilizing safety coefficient method, via analogue analysis to stability of surrounding rock via Flac software, the stable safety range of wall rock is obtained. Based upon this result, the grouting reinforcement rim parameter is suggested to be determined with comprehensive consideration of tunnel water inflow volume and surrounding rock stability.
出处
《公路交通技术》
2008年第5期99-102,共4页
Technology of Highway and Transport
基金
国家863基金资助项目(2007AA112134)
关键词
海底隧道
注浆圈
涌水量
围岩稳定
数值分析
undersea tunnel
grouting rim
water inflow volume
surrounding rock stability
numeric analysis
