碾压混凝土和常态混凝土联合筑坝结构温度应力与变形分析  

Temperature Stress and Deformation of RCC-CC Combined Dam Structure

作　　者：汪娟 赵凯丽 王振红[1] WANG Juan;ZHAO Kaili;WANG Zhenhong(China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Beijing IWHR Corporation,Beijing 100048,China;Pumped-Storage Technological&Economic Research Institute,State Grid Xinyuan Co.,Ltd.,Beijing 100053,China)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]北京中水科工程集团有限公司,北京100048 [3]国网新源控股有限公司抽水蓄能技术经济研究院,北京100053

出　　处：《水利与建筑工程学报》2025年第2期149-154,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家重点研发计划项目(2021YFC3090102,2021YFC3090104);国家自然科学基金(52192672)。

摘　　要：针对碾压混凝土和常态混凝土在坝体交界面区域引发复杂的温度应力和变形问题,以向家坝重力坝为例,结合三维有限元分析,进行碾压-常态混凝土联合筑坝结构温度应力与变形研究,分析不同性质的混凝土因热力学指标差异对缝开度变化的影响以及施工期和运行期坝体温度作用下的应力与变形情况。结果表明:当坝体蓄水至正常水位时,纵缝和横缝的应力分布呈现出以压应力为主的特征;随着上游水位的上升,坝体会因齿槽布置形式的差异以及地基条件相对软弱而发生顺河向下游和竖向向下的位移;两种性态混凝土交界处应力相对较小,不同部位、不同类型混凝土最大拉应力通常出现在后期冷却结束。The complex temperature stress and deformation problems caused by RCC-CC in the interface area of the dam body,taking the Xiangjiaba gravity dam as an example,combined with three-dimensional finite element analysis,this work analyzed the temperature stress and deformation of RCC-CC,the influence of thermodynamic index differences on the variation of joint opening in concrete with different properties,as well as the stress and deformation under the influence of dam body temperature during construction and operation periods.The results are as follows.When the dam body is filled with water to the normal water level,the stress distribution of longitudinal and transverse joints shows a characteristic dominated by compressive stress.As the upstream water level rises,the dam will experience displacement downstream and vertically downwards along the river due to differences in the arrangement of tooth slots and relatively weak foundation conditions.The stress at the junction of the two types of concrete is relatively small,the maximum tensile stress usually occurs at the end of the later cooling.

关 键 词：碾压混凝土和常态混凝土 联合筑坝 温度应力 缝开度 大坝变形 

分 类 号：TV315[水利工程—水工结构工程]