錾高水电站工程输水渠道湿陷性黄土基础处理方案  

Treatment Plan for Collapsible Loess Foundation of Water Delivery Channel in Zhangao Hydropower Station Project

作　　者：王小军[1] WANG Xiaojun(Xinjiang Institute of Water&Hydropower Engineering Investigation,Design and Research 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：《云南水力发电》2023年第11期164-168,共5页Yunnan Water Power

摘　　要：錾高水电站工程为大流量引水式电站,主要任务是发电,渠道设计流量375.6m3/s,总线路长8.6 km,工程规模大,渠道线路长,沿线地形地质条件复杂.在可行性研究阶段对渠道基础处理进行了多方案比较研究,包括预浸水法、强夯法、换填法,基本确定了以换填法为主的处理思路;施工图设计阶段对黄土段渠道基础进行补充勘测,进一步明确了黄土段渠道基础的深度分布及地下水补给情况,研究了地下水对湿陷性的影响,明确了湿陷界限,设计处理方案仍以换填方式为主,结合现场试验确定了基础处理深度及范围.工程运行后经沉降观测验证,该段渠道基础处理方案是合理可行的.Zhangao Hydropower Station project is a large flow diversion type power station,with the main task of generating electricity.The designed flow rate of the channel is 379.6 m3/s,and the length of the bus road is 8.6km.The project scale is large,the channel route is long,and the terrain and geological conditions along the line are complex.In the feasibility study stage,multiple schemes are compared for channel foundation treatment,including pre immersion method,dynamic compaction method,and replacement method,and the main treatment approach is basically determined to be the replacement method.During the construction drawing design phase,supplementary surveys are conducted on the channel foundation in the loess section,further clarifying the depth distribution and groundwater recharge of the channel foundation in the loess section.The impact of groundwater on collapsibility is studied,and the boundary of collapsibility is clarified.The design and treatment plan still focused on replacement methods,and the depth and scope of basic treatment were determined through on-site experiments.After the operation of the project,settlement observation has verified that the foundation treatment plan for this section of the channel is reasonable and feasible.

关 键 词：引水式电站 输水渠道 大流量 湿陷性黄土 基础处理 

分 类 号：TV223.21[水利工程—水工结构工程]