摘要
以甘肃省引洮工程总干渠15#引水隧洞施工实践为例,分析了隧洞所在标段饱和黄土的主要工程地质条件,着重研究了在隧洞施工过程中遇到的围岩塌方、拱架变形、涌水等不良地质现象并提出了预防和处理措施,并且通过对桩号为105+166安装的围岩变形观测试验数据分析得到了饱和黄土隧洞变形的一般规律,为施工中何时进行二次支护提供科学的依据。
Taking the construction of 15 # water supply tunnel of the engineering of divert water from Tao river,in Gansu province as a example,main engineering geological conditions of saturated loess in the tunnel are analyzed.Some bad engineering geological phenomena such as collapse,arch deformation and water gushing met in the tunnel construction are studied,and the preventive and treatment measures are given.Meanwhile,the wall rock deformation observation data at 105＋166 pile number are analyzed.The result gives general deformation rule of saturated loess tunnel and provides scientific references for second supporting.
出处
《西北地震学报》
CSCD
北大核心
2011年第B08期340-344,共5页
Northwestern Seismological Journal
关键词
引洮工程
引水隧道
饱和黄土
塌方
收敛变形
Engineering of divert water from Tao river
Water supply tunnel
Saturated loess
Collapse
Convergence deformation
