施工技术 2014年11月上 24 CONSTRUCTION TECHNOLOGY 第43卷第21期 D01:10.7672/gjs2014210024 钻劈法施工在大岗山水电站围堰防渗墙工程中的应用 梅良敏，苟永平 (葛洲坝集团基础工程有限公司，湖北宜昌443002) [摘要]大岗山水电站上、下游土石围堰采用复合土工膜心墙普通混凝土防渗墙，防渗墙质量的好坏直接影响基坑 开挖及大坝主体工程施工，意义重大.由于围堰地处狭窄的“”形河谷地段，地势陡峻，且河床部位有多条辉绿岩 脉、断层、破碎带穿插，地质条件十分复杂，给防渗墙施工带来了极大困难.本工程采用钻劈法施工工艺成功解决 了防渗墙成槽难题. [关键词]水电站；围堰；防渗墙；钻劈法；施工技术 [中图分类号]TV73 [文献标识码]A [文章编号]1002-8498(2014)21-0024-03 Application of Boring Cleaving Method in Cofferdam Anti-seepage Wall of the Dagangshan Hydroelectric Power Station Mei Liangmin Gou Yongping Gezhouba Group Foundation Engineering Co.Ltd.Yichang Hubei 443002 China) Abstract:The upstream and downstream concrete cofferdam of the Dagangshan hydroelectric power station uses usual concrete anti-seepage wall with posite geomembrane core-wall.It is of great significance because the quality of the anti-seepage wall will directly affect the construction of foundation excavation and the main work of the dam.The geological conditions are plex that the cofferdam locates in V- shaped valley area with steep terrain moreover multiple diabase dikes faults and fracture zone lie in riverbed which brings greatly difficulties to the anti-seepage wall.The project solves how to make slot with construction technology of boring cleaving method. Key words:hydroelectric power stations;cofferdams;anti-seepage wall;boring cleaving method;construction 1工程概况 大困难. 大岗山水电站位于雅安市石棉县安顺场上游2围堰地质条件 约27km处，大坝坝型为混凝土双曲拱坝，其上、下 上、下游围堰相距约585m 地形条件相似.枯水 游围堰为土石围堰，采用复合土工膜心墙普通混凝 期上、下游水位高程分别为952.700 ...
钻劈法施工在大岗山水电站围堰防渗墙工程中的应用.pdf
