摘要
坝体应力应变监测是坝体蓄水期重要的监测项目,但其埋设的过程中经常存在监测数据缺失等问题,因此开展基于坝体实测数据,建立拱坝-地基有限元模型,对数据进行数据插补,并利用QH3D进行可视化研究.同时利用三维有限元模型计算了西南某特高拱坝的坝体应力应变分布.结果表明:利用坝基压应力计与转换后的应变计结果进行对比验证,在坝踵、坝轴、坝趾二者应力在蓄水前应力相差0.02、0.78、0.09 MPa,在蓄水后二者相差0.14、0.26、0.07 MPa,在坝踵和坝趾处拟合较好;随着上游水位逐渐抬升,拱坝坝踵处应力逐渐减小,坝趾处应力逐渐增大,在上游面水压作用下,应力基本在2 MPa以内,安全裕度较大.
The monitoring of the stress and strain of dam is important during the impounding period of the dam,but it often encounters problems such as missing monitoring data in the buried process.Therefore,based on the measured data of the dam,the finite element model of the arch dam-foundation is established,data interpolation is carried out,and QH3D is used to carry out visualization research.The stress and strain distribution of an ultra-high arch dam in southwest China is calculated by using the three-dimensional finite element model.The results showed that,in comparison with the results of the dam foundation compressive stress gauge and the converted strain gauge,the stress difference between the heel,shaft and toe of the dam before impounding is 0.02MPa,0.78MPa and 0.09MPa,and the difference between them after impounding is 0.14MPa,0.26MPa and 0.07MPa with better fitting at the heel and toe of the dam.With upstream water level rising gradually,the stress at the heel of the arch dam gradually decreases and the stress at the toe of the arch dam gradually increases.Under the action of water pressure on the upstream surface,the stress is basically less than 2MPa,and the safety margin is large.
作者
付雨晨
王亚军
胡昱
FU Yuchen;WANG Yajun;HU Yu(College of Hydraulic&Environmental Engineering,China Three Gorges Univ.,Yichang 443002,China;School of Marine Engineering Equipment,Zhejiang Ocean Univ.,Zhoushan 316022,China;College of Water Resources and Hydropower Engineering,Tsinghua Univ.,Beijing 100083,China)
出处
《三峡大学学报（自然科学版）》
CAS
2023年第6期14-21,共8页
Journal of China Three Gorges University：Natural Sciences
基金
浙江省自然科学基金(LHY21E090003)。
关键词
特高拱坝
应力应变
蓄水期
数据缺失
QH3D
ultra-high arch dam
stress and stain
impounding period
data missing
QH3D
