王圪堵水库坝址基础处理措施的研究  

Study on Treatment Measures of Dam Foundation in the Wanggedu Reservoir

作　　者：杨聚利[1] 宋文搏[1] 濮声荣[1] 

机构地区：[1]陕西省水利电力勘测设计研究院,陕西西安710001

出　　处：《资源环境与工程》2012年第5期501-504,共4页Resources Environment & Engineering

摘　　要：王圪堵水库地处陕北黄土高原北部,毛乌素沙漠南缘的结合部位。坝址横跨三个地貌单元,工程地质及水文地质条件复杂。河库基岩为砂、泥岩,上覆为砂土层,较厚,需加以利用。其强度与稳定性是主要的工程地质问题之一。通过对地质条件的研究,认为对河库砂砾石层及下伏基岩强风化岩体进行垂直防渗处理是必要的,下部基岩可不设置防渗帷幕。河库下部砂土层压缩性低,可在降水后振动压实即可,无需特殊处理;无需对承压水进行专门处理,只需做好坝底和坝脚反滤排水体,即可保证大坝安全。Wanggedu reservoir which is located at the boundary of the north Loess Plateau in northern Shaanxi province and the south Mn Us Desert passes through three different geographic units,with complicated conditions of engineering geology and hydrogeology.The bedrock of the reservoir is sand and mudstone,the overburden layer is sandy soil which is rather thick,they are needed to be used.The strength and stability is one of the main engineering geological problems.The confined water distributes in the underlying rock of reservoir,whether the treatment is carried out or not relates to the engineering safety and investment.Based on the study of geological conditions of reservoir,it is think that vertical seepage prevention to the gravel layer and highly weathered rock mass in underlying bedrock is necessary,anti-seepage curtain may not set in the bedrock bottom.The sandy soil layer in the bottom of the reservoir with low compressibility can be dealt with by vibratory compaction after rain,does not need the special treatment,and it dose not need the specialized treatment to the confined water.It is only need to do a good anti-seepage drain in the dam base and dam toe which could ensure the dam safety.

关 键 词：坝基处理 砂砾石层 砂泥岩 承压水 

分 类 号：TV5[水利工程—水利水电工程]