高拱坝坝肩开挖集中堆渣对河道截流的影响分析  

Analysis of Impact of High Arch Dam Abutment Excavation and Central Dumping on River Closure

作　　者：贺昌海[1] 刘国清[1] 王新平[1] 蒲建平[2] 唐朝阳[2] 周钟[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]中国水电顾问集团公司成都勘测设计研究院,四川成都610072

出　　处：《水电能源科学》2008年第3期98-99,34,共3页Water Resources and Power

摘　　要：分析了高拱坝坝肩开挖施工过程中产生的集中堆渣对河道截流的有利影响,提出了坝肩附近集中堆渣能降低截流戗堤龙口水力参数需具备的水力控制条件。以锦屏一级水电站为例,从截流模型试验和水力控制条件计算两方面给予验证,提出对截流难度较大的工程可利用坝肩集中堆渣的方法降低截流难度,建议综合考虑坝肩开挖、截流、坝基开挖、上下游围堰填筑、洪水期河道过渣能力等因素对堆渣位置和形状及数量进行合理规划的原则。This paper investigates the favourable impact of the central dumping during high arch dam abutment excavation on river closure, and proposes the hydraulic control which is required for the abutment central dumping to reduce needed hydraulic parameters on the dike closure. Jinping- I project has been given as the example, It has been substantiated in both the closure model tests and hydraulic control calculation that, the abutment central dumping can reduce closure difficulty especially to the rather difficult river closure. The location, quantity and shape of the dumping should be scientifically and reasonably planned, during which process the following factors should be taken into consideration： abutment excavation, river closure, dam base excavation, the filling of upstream and downstream cofferdam etc.

关 键 词：坝肩开挖 集中堆渣 河道截流 水力控制条件 

分 类 号：TV642.4[水利工程—水利水电工程] TV551.2