摘要
隧洞固结灌浆不仅增强围岩自身稳定性,对地下水形成的外水压力有折减作用。岩溶山区岩溶管道系统发育,水文地质条件复杂,隧洞与岩溶管道系统常交叉连通,隧洞固结灌浆施工时要慎重处理;根据水工隧洞建筑物断面形状、隧洞与地下水径流路径相对位置关系,以及水文地质单元的不同,采用固结灌浆措施有差别,当隧洞位于岩溶管道系统上部时,固结灌浆以不要改变原始岩溶管道补排径关系为原则,再考虑尽量固结围岩;当隧洞位于系统下部时,封堵连接岩溶管道系统的通道,加强固结灌浆,增强围岩体抵抗地下水能力,保护衬砌混凝土结构。
Consolidation grouting of the tunnel can not only strengthen the stability of surrounding rock itself,but also can reduce the pressure of external water formed on groundwater. The karst pipe system is developed in Karst mountainous area,and complex of the hydrological geology conditions,the tunnel always is in cross communication with the karst pipe system,needs to be treated carefully while construction of tunnel consolidation grouting. In line with the section shape of hydraulic tunnel structure,relative position relation of the tunnel and the groundwater runoff route,and variable units of hydrological geology,it is different to adopt the measures of consolidation grouting： taking not to change the original karst pipe diameter as the principle to conduct the consolidation grouting when the tunnel is located on the top of the karst pipe system,then to consider to consolidate the surrounding rock as possible; to seal the channel connecting the karst pipe system when the tunnel is located in the lower part of system,to strengthen consolidation grouting,to increase the ability of surrounding rock body against groundwater,so as to protect the lining concrete structure.
作者
武兴亮
欧波
WU Xing-liang;OU Bo(Guizhou Provincial Water Conservancy ＆ Hydroelectric Power Investigation,Design and Research Institute,Guiyang 550002,China)
出处
《黑龙江水利科技》
2018年第7期1-5,共5页
Heilongjiang Hydraulic Science and Technology
基金
黔科合重大专项字[2017]3005-1号
关键词
固结灌浆
地下水
径流路径
岩溶管道系统
隧洞受力
consolidation grouting
groundwater
route of runoff
karst pipe system
stress of tunnel
