引水隧洞坍塌冒顶原因分析与处理  

Analysis and Treatment of the Causes of Diversion Tunnel Collapse

作　　者：王伟 祁安岭 WANG Wei;QI Anling(Henan Water Conservancy Survey CO.LTD.,Zhengzhou 450008,China;Special Geotechnical Environment Control Engineering Technology Center of Henan Province,Zhengzhou 450008,China)

机构地区：[1]河南省水利勘测有限公司,河南郑州1450008 [2]河南省特殊岩土环境控制工程技术中心,河南郑州450008

出　　处：《河南水利与南水北调》2023年第10期101-102,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：以小浪底北岸灌区工程某处引水隧洞坍塌冒顶为例,叙述了坍塌冒顶发生的过程;根据坍塌冒顶处地形地貌及工程地质、水文地质条件,分析了坍塌冒顶发生的原因;针对性地采取高压旋喷灌浆+管棚超前支护进行处理,经对处理后的洞身段围岩收敛变形及拱顶围岩沉降进行观测,洞身围岩收敛变形及拱顶围岩沉降正常。为类似隧洞工程可能出现的坍塌冒顶原因分析及处理提供参考。Taking the collapse of a diversion tunnel in the north bank of Xiaolangdi irrigation area as an example,the process of collapse and roof collapse is described.According to the landform,engineering geology and hydrogeology conditions,the causes of collapse and collapse are analyzed.The treatment is carried out by using high pressure rotary spray grouting and advanced support of pipe shed.The convergence and deformation of the surrounding rock of the tunnel section and the settlement of the surrounding rock of the arch are observed after treatment.It provides reference for the analysis and treatment of possible collapse in similar tunnel engineering.

关 键 词：隧洞 围岩 坍塌冒顶 高压旋喷灌浆 管棚超前支护 

分 类 号：TV6[水利工程—水利水电工程]