WSX水库工程窄深式河槽大坝基础处理方案比选  

Comparison and Selection of Foundation Treatment Schemes for Narrow Deep Channel Dam of WSX Reservoir Project

作　　者：谢宇[1] XIE Yu(Xinjiang Water Conservancy and Hydropower Survey and Design Institute Co.,Ltd.,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆乌鲁木齐830000

出　　处：《红水河》2022年第4期39-43,共5页Hongshui River

摘　　要：WSX水库坝址区的河道地形受河水冲刷及洪水的影响,形成窄深式深切河槽,河道两岸覆盖深厚的钙质胶结砂砾石层,属于南疆地区具有代表性的河道特点。为保证大坝的安全建设和运行,大坝的基础处理是关键,属于重要隐蔽单元工程和关键部位,防渗体系在大坝建设中起着重要作用。根据现有地质勘察资料,结合工程施工的可行性、合理性,该工程基础处理拟定了防渗墙和高基座两种技术上均可行的方案进行技术经济综合比选,推荐采用防渗墙方案,即先对窄深式河槽进行填筑后成墙的施工方法,通过基座将沥青混凝土心墙与防渗墙连接形成防渗体系。该方案具有施工安全、施工难度小、工程量少、投资少等特点,可为类似中小型工程提供设计思路。The river topography in the dam site area of WSX Reservoir is affected by river water scouring and flood,forming a narrow and deep-cut channel.The deep calcareous cementation sandy gravel layer on both sides of the river is covered,which belongs to the representative river characteristics in southern Xinjiang.In order to ensure the safe construction and operation of the dam,the foundation treatment of the dam is the key,which belongs to the important hidden unit engineering and key parts.The anti-seepage system plays an important role in the dam construction.According to the existing geological exploration data,combined with the feasibility and rationality of engineering construction,the foundation treatment of the project has developed two feasible schemes of cut-off wall and high base technology for technical and economic comprehensive comparison and selection.It is recommended to adopt the cut-off wall scheme,that is,the construction method of filling the narrow deep channel before forming the wall,and the anti-seepage system is formed by connecting the asphalt concrete core wall and the cut-off wall through the base.The scheme has the characteristics of construction safety,small construction difficulty,less engineering quantity and less investment,which can provide design ideas for similar small and medium-sized projects.

关 键 词：窄深式河槽 钙质胶结砂砾石 坝基处理 

分 类 号：TV543.8[水利工程—水利水电工程]