某拱坝施工期应力应变监测资料分析  

Analysis of monitored stress and strain data of an arch dam under construction

作　　者：陈锴 陈波[3] CHEN Kai;CHEN Bo(Large Dam Safety Supervision Center,National Energy Administration)

机构地区：[1]国家能源局大坝安全监察中心,浙江杭州311122 [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]河海大学水利水电学院,江苏南京210098

出　　处：《大坝与安全》2024年第1期44-48,共5页Dam & Safety

摘　　要：根据某拱坝内埋设的应变计组及配套无应力计的实测数据,计算得到9号坝段混凝土的温度线膨胀系数、自生体积变形及单轴应变,采用变形法反推得到应变计组实测的坝体应力(包括正应力、剪应力和主应力等),并对9号坝段混凝土实际应力分布特性、变化规律及应力量值进行分析。计算分析结果显示,施工期9号坝段混凝土应力变化规律及分布特征基本合理,应力量值在允许范围内,坝体应力处于正常状态。According to the measured data by the strain gauge group and the supporting stress-free gauge embedded in an arch dam,the temperature linear expansion coefficient,autogenous volume defor-mation and uniaxial strain of the concrete of dam section No.9 are obtained by calculation.The mea-sured dam stress(including normal stress,shear stress and principal stress,etc.)by the strain gauge group is obtained by using the deformation method.The actual stress distribution characteristics,varia-tion law and stress magnitude of the concrete of dam section No.9 are analyzed.The calculation and analysis results show that the variation law and distribution characteristics of concrete stress of dam sec-tion No.9 are basically reasonable,the stress magnitude is within the allowable range,and the stress of dam body is in normal state.

关 键 词：混凝土应力 应变计 线膨胀系数 自由体积变形 自生体积变形 

分 类 号：TV698.1[水利工程—水利水电工程]