苗尾水电站心墙坝接触土料质量控制指标探析
摘要:水电水利工程通常采用塑性指数和黏粒含量来判别接触土料质量。土的塑性取决于黏粒部分中含有能与水发生物理化学作用的高亲水性黏土矿物的种类和含量,而塑性指数越大,土体的水稳定越差。通过分析,现行标准中对接触土料塑性指数和黏粒含量的指标界定不尽合理。提出以塑性指数Ip=10~26、活动性指数Ac=0.75~1.25作为接触土料质量控制指标。苗尾水电站土料黏粒含量低于规范要求,但计算得到活动性指数Ac为1.08~1.25,符合活动性指数要求,可作为接触土料利用。苗尾水电站建成投产后,根据监测资料,两岸接触性黏土位移较小,未发生塑性破坏,从而说明提出的控制指标是可行的。
Abstract:In the hydropower and water conservancy projects, the quality of contact soil is usually judged by the plasticity index and clay content. The plasticity of the soil depends on the type and content of highly hydrophilic clay minerals in the clay particle, which are capable of physicochemical interaction with water. The greater the plasticity index, the worse the water stability of the soil. Through analysis, the definition of the plasticity index and clay content of the contact soil in the current standard is not reasonable. The plasticity index Ip=10~26 and the activity index Ac=0.75~1.25 are proposed as the quality control indicators for contact soil materials. The clay content of soil materials for the Miaowei hydropower station is lower than the requirements of the specification, but the activity index Ac is calculated to be 1.08~1.25, which meets the requirement of activity index, so that it can be used as contact soil. After the Miaowei hydropower station was put into operation, according to the monitoring data, the displacement of the contact clay soil on both sides of the bank was small and no plastic failure occurred, which proved that the proposed control index is feasible.
中文标题：
苗尾水电站心墙坝接触土料质量控制指标探析
Quality Control Index for Contact Clay in Core Wall Dam of Miaowei Hydropower Project
作者：
孟永旭1,董育烦2,尹飞3,陈梁3,王永明2
Meng Yongxu1,Dong Yufan2,Yin Fei3,Chen Liang3,Wang Yongming2
作者简介:孟永旭,男,1964年生,大学本科,教授级高级工程师,主要从事水电水利工程地质勘察工作。E-mail:myx@sidri.com
通讯地址：
1. 上海勘测设计研究院有限公司, 上海 200335; 2. 中国电建集团华东勘测设计研究院有限公司, 浙江杭州 311122; 3. 华东勘测设计院(福建)有限公司, 福建福州 350000
1.ShanghaiInvestigation,Design&ResearchInstituteCorporationLimited,Shanghai200335,China; 2.HuadongEngineeringCorporationLimited,Hangzhou311122,Zhejiang,China; 3.HuadongEngineering(Fujian)CorporationLimited,Fuzhou350000,Fujian,China
中图分类号:P642.11+4
doi:10.3969/j.issn.1007-2993.2020.06.004
出版物：岩土工程技术
收稿日期:2019-12-09
网络出版日期:2021-07-06
关键词:心墙坝,接触黏土,高塑性土,活动性指标,塑性指数
Key words:core wall dam,contact clay,high plastic soil,activity index,plasticity index
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