高拱坝坝肩开挖出渣方式施工技术进展及工程研究  

Technical Progresses and Engineering Research of Abutment Excavation Taphole Methods for High Arch Dams

作　　者：任金明[1] 曾建平[1] 陈炜旻[1] 邬志[1] 

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州310014

出　　处：《水力发电》2014年第8期116-118,132,共4页Water Power

摘　　要：坝肩开挖是高拱坝工程的关键项目,西部高拱坝坝肩开挖普遍存在支护量大、地形高陡、道路布置困难、开挖工作面狭小、出渣速度受制约、地质风险度大、不确定因素多等问题。针对西部高拱坝工程特点,对高拱坝坝肩开挖及出渣施工技术进行了总结,提出拱坝坝肩开挖的关键在于出渣速度,主要制约因素是道路布置和开挖工作面大小;坝肩开挖方案选择主要与工程截流时机密切相关,而截流时机主要受导流隧洞施工进度控制,若能创造条件使导流隧洞提前分流,则可从根本上解决大量开挖石渣下江带来的一系列问题。The abutment excavation is a key project of high arch dam construction. The common problems of high arch dams＇ abutment excavation in western China contain large quantities of supporting, high and steep terrain, difficult road arrangement, narrow excavation space, slow taphole speed, high geological risk and too many uncertain factors. With the project characteristics of high arch dams in western China, the abutment excavation and construction technologies of high arch dams are reviewed and summarized herein. It is presented that： （a） the key of abutment excavation of high arch dams is the speed of taphole and the constraints for abutment excavation are traffic road arrangement and the size of excavation surface; and （6） the selection of abutment excavation scheme is closely related to the time of river closure, and the closure time is mainly controlled by diversion tunnel construction. If the diversion tunnel can be early put into operation, the problem of excavated gravel falling into river can be fundamentally solved.

关 键 词：高拱坝 坝肩开挖 施工技术 

分 类 号：TV642.4[水利工程—水利水电工程] TV554.11