超深覆盖层沥青混凝土心墙坝坝基防渗方案研究  

Foundation Seepage Control Structure of Dam with Asphalt Concrete Core on Super-deep Overburden

作　　者：朱晟[1] 林道通[1] 胡永胜[2] 何顺宾[2] 

机构地区：[1]河海大学水文水资源与水利水电工程科学国家重点实验室,江苏南京210098 [2]中国水电顾问集团成都勘测设计研究院,四川成都610071

出　　处：《水力发电》2011年第10期31-34,共4页Water Power

摘　　要：坝基防渗方案的选择是超深覆盖层上高土石坝建设需要解决的关键技术问题之一。黄金坪沥青混凝土心墙堆石坝坝基为最大深度达133.9 m的强透水性砂砾料覆盖层,且河谷左右两岸地形不对称,为研究不同防渗墙和廊道设计方案对大坝变形与应力的影响,用三维有限元法对不同坝基防渗方案的大坝应力变形性状进行了数值分析。分析认为,坝基采用封闭式混凝土防渗墙、结合小尺寸廊道与沥青混凝土心墙相连的防渗方案,对坝体的应力和变形更为有利。The foundation seepage control scheme is one of the key technical issues in constructing high embankments dams. The Huangjinping Embankment Dam with asphalt concrete core is founded on an overburden which composed by sand and gravel with strong permeable and a maximum depth of 133.9 m. The valley at dam site is also asymmetric. In order to study the influences of different cut-off wall and corridor programs on dam deformation and stress, the 3-D finite element method is used to analysis the stress and deformation on the conditions of different foundation seepage control structures. The studies show that the seepage control system of closed concrete cut-off wall with small-size corridor and combined with asphalt concrete core is beneficial to stress and deformation control of the Dam.

关 键 词：覆盖层 土石坝 沥青混凝土心墙 防渗墙 廊道 黄金坪水电站 

分 类 号：TV223.42[水利工程—水工结构工程]