高海拔高寒峡谷巨孤漂石地层混凝土防渗墙施工技术  

Construction Technology of Concrete Impervious Wall in Giant Boulder Stratum in High Altitude and Alpine Valley

作　　者：李东福[1] LI Dongfu(Sinohydro Bureau 7 Co.,LTD,Chengdu,Sichuan,611130)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都611130

出　　处：《四川水力发电》2020年第6期40-44,共5页Sichuan Hydropower

摘　　要：西藏高原独特的地形地貌和复杂多样的地质特征,特别是该区域多为深Ⅴ峡谷河段与崩坡冲积巨孤漂石地层,存在大起伏、河床深切陡坡,河床内巨孤漂石粒径大且含量超多,增加了水电站工程防渗墙的施工难度。针对该类地质条件,通过采取超前同轴钻孔精准预爆技术,结合对巨孤漂石预爆、物探检测和三维地质可视化等基覆界线判定综合集成技术,安全、高效、保质保量地完成了防渗墙施工。该技术不仅先进、成熟可靠,可有效规范高海拔高寒峡谷巨孤漂石地层地区混凝土防渗墙施工工艺,实现标准化、程序化作业,便于施工人员操作执行,而且经济效益和社会效益突出。介绍了该项技术的研究与应用过程。The unique topography and complex geological characteristics of Tibet Plateau,especially the deep valley reaches and collapse slope alluvial boulder stratum in this region,with large undulation,deep and steep riverbed slope,large particle size and excessive content of giant boulders in the riverbed,which increases the construction difficulty of the impervious wall of hydropower stations.In view of this kind of geological conditions,through the adoption of advanced coaxial drilling precision pre-blasting technology,combined with the comprehensive integrated technology of base boundary determine,such like large boulder pre-blasting,geophysical detection and 3D geological visualization,the construction of impervious wall is completed safely and efficiently with quality and quantity.The technology is not only advanced,mature and reliable,but also can effectively standardize the construction technology of concrete impervious wall in the giant boulder stratum area at high altitude and alpine valley,realize standardized and programmed operation,facilitate the operation of construction personnel,and have outstanding economic and social benefits.The study and application of this technology are introduced.

关 键 词：高海拔 高寒 峡谷 西藏大古 水电站 巨孤漂石 防渗墙 施工技术 

分 类 号：TV7[水利工程—水利水电工程] TV543