水电站高埋深硐室群渗压计施工技术研究  

Study on Construction Technology of Piezometer in Deeply-Buried Chambers

作　　者：王晓佳 靳伟强 WANG Xiaojia;JIN Weiqiang(No.3 Engineering Co.,Ltd.of China Gezhouba Group,Xi'an 710061,China)

机构地区：[1]中国葛洲坝集团第三工程有限公司,陕西西安710061

出　　处：《电力勘测设计》2022年第6期58-65,共8页Electric Power Survey & Design

摘　　要：孔隙水压力监测是大坝、闸口边坡、河道堤坝、水电站厂房等常见观测项目之一,孔隙水压力计常用来观测岩体内渗透水压力,不同部位的埋设方法也有所不同。以巴基斯坦N-J水电站项目地下厂房硐室群为例,研究适用于复杂地质条件的高埋深硐室群渗压计施工技术,用于不同量程渗压计的施工及监测。根据钻孔特征及地质情况进行钻机选型,制定合理的钻孔方案;根据渗压计钻孔轴线朝向,制定渗压计安装及封孔回填等方案,并阐述复式渗压计的安装方法。最后分析总结振弦式读数仪采集的数据。Pore water pressure monitoring is one of the common observation activities in dams,gate slopes,river embankments,and hydropower plants,etc.Piezometers are commonly used to observe the permeable water pressure in rock masses,and the method of embedding varies in different parts.In this article,using the Neelum Jhelum hydropower project in Pakistan as an example,the construction technology of seepage piezometers for high burial depth chamber complex are studied,which is used for the construction and monitoring of different ranges of seepage piezometers.To implement the subject technology,the drilling rig is selected according to the characteristics of the borehole and geological conditions,and a reasonable drilling plan is developed.Further,the installation and backfilling of the seepage piezometer is developed according to the orientation of the seepage piezometer borehole axis,and the installation method of the comprehensive seepage piezometer is described.The data collected by the vibrating string type readout was analyzed and summarized.

关 键 词：水电站 高埋深硐室群 渗压计 孔隙水压力 监测 施工技术 

分 类 号：TV52[水利工程—水利水电工程]