某大型水库溢洪闸地基与基础抗剪试验研究  

Research on the Base and Foundation Shear Test of the Spillway Sluice of a Large Reservoir

作　　者：魏军[1] WEI Jun(China Building Materials Industry Geologic Exploration Center Shandong Groups,Jinan 250100,Shandong,China)

机构地区：[1]中国建筑材料工业地质勘查中心山东总队,山东济南250100

出　　处：《工程技术研究》2023年第4期217-219,共3页Engineering and Technological Research

摘　　要：某水库溢洪闸位于某河流中、下游,溢洪闸闸址区地基土为水泥土垫层,厚2.5 m。水泥土垫层为水泥黏性土结构,其质量直接影响闸基的稳定性。文章对闸基底板与地基土的接触面进行了抗剪强度试验研究,通过直剪试验对接触面分步进行法向荷载(20 kPa、40 kPa、60 kPa、80 kPa、100 kPa),将所得抗剪强度成果采用图解法和最小二乘法进行数据整理与分析,从分组数据、综合数据、各分级荷载平均值三个方面研究了接触面的剪切峰值强度和比例极限强度,得出了闸基底板与地基土的抗剪强度参数值,可以为水库安全鉴定阶段的溢洪闸抗滑稳定性验算提供科学、合理的依据。The spillway sluice of a reservoir is located in the middle and downstream of a river.The foundation soil of the spillway sluice site is cement-soil cushion with a thickness of 2.5 m.The cement-soil cushion is a cement cohesive soil structure,and its quality directly affects the stability of the sluice foundation.In this paper,the shear strength test of the contact surface between the sluice base plate and the foundation soil is carried out.The normal load(20 kPa,40 kPa,60 kPa,80 kPa,100 kPa)of the contact surface is carried out step by step by direct shear test.The obtained shear strength results are sorted and analyzed by graphic method and the ordinary least square method.The shear peak strength and proportional ultimate strength of the contact surface are studied from three aspects:group data,comprehensive data and average value of each graded load.The shear strength parameters of the sluice base plate and the foundation soil are obtained.It can provide scientific and reasonable basis for checking the anti-sliding stability of spillway sluice in the reservoir safety appraisal stage.

关 键 词：直剪试验 抗剪强度 基底摩擦系数 接触面 

分 类 号：TV62[水利工程—水利水电工程] TV882.1