摘要
隧道工程场区是否存在高地应力对路线选择及工程造价影响极大,对深埋隧道应进行地应力专项测试分析。通过对云南省某拟建高速公路软岩隧道地应力专项测试分析过程进行总结,明确了勘察中常用地应力测试方法,并归纳水压致裂法与DCDA法适用条件,分别采用强度应力比法与新岩体强度应力比地应力评价指标对软岩隧道地应力进行评价,规范方法评价结果极为保守,新岩体强度应力比地应力评价指标在软岩高地应力评价取得的结果更为合适。
Whether there is high geostress in tunnel engineering site has great influence on route selection and project cost.This paper summarizes geostress measurement and analysis process of a soft rock tunnel in Yunnan province,clears the crustal stress test methods in geological survey,generalizes the applicable conditions of hydraulic fracturing method and DCDA method and uses the Strength-stress ratio method and the New geostress evaluation index of rock mass strength stress ratio to valuate the geostress of a soft rock tunnel.The evaluation results shows that the Strength-stress ratio method is more conservative,and the Newgeostress evaluation index of rock mass strength stress ratio is more suitable.
作者
朱源婷
黄彪
Zhu Yuanting;Huang Biao(Guizhou Geological Environment Monitoring Institute,Guiyang 550081,China;Guizhou Transportation Planning Survey&Design Academe Co.,Ltd.,Guiyang 550081,China)
出处
《科学技术创新》
2022年第26期125-128,共4页
Scientific and Technological Innovation
基金
贵州省科学技术厅科技平台及人才团队计划(黔科合人才[2017]5402)。
关键词
隧道工程
软岩
地应力测试
tunnel engineering
soft rock
geostress measurement
