紧水滩拱坝裂缝稳定性分析  

Analysis of crack stability in Jinshuitan Arch Dam

作　　者：常晓林[1] 游锋[1] 李民[1] 黄成家[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2008年第5期26-30,62,共6页Engineering Journal of Wuhan University

摘　　要：为研究紧水滩拱坝已监测出的主要坝面裂缝的存在或发展对拱坝正常运行的影响,进行了裂缝稳定性数值计算,其中坝体混凝土采用理想弹塑性本构关系和Mohr-Coulomb屈服准则,含裂缝的部分区域采用子模型技术,裂缝内采用动态接触状态的分析模型.分析结果表明:已有裂缝对拱坝整体工作性态无影响,裂缝的稳定性与其位置和缝面水压作用形式有关.验证了4种工况下裂缝的稳定性,提出应对其中的3处裂缝采取防渗止水措施防止其继续发展.In order to study the influence of the existence or the development of cracks monitored from the main dam surface on the normal operation of the Jinshuitan Arch Dam, the numerical calculation of crack stability is made. An ideal elastoplastic constitutive relation and Mohr-Coulomb yield criterion are used for the dam concrete; submodeling technique is used for the cracking zones; and dynamic contact theory is used for the crack itself. The results show that the existence of cracks has little influence on the whole performance of the dam; the stability of these cracks is related to the locations of cracks and water pressure form in crack surface. The stability of the cracks is checked in four working conditions; and water seepage prevention measures should be carried out to three positions among all the cracks.

关 键 词：紧水滩 拱坝 裂缝 子模型 稳定性分析 

分 类 号：TV642.4[水利工程—水利水电工程]