高拱坝横缝开度及其影响因素分析  

Analysis of Transverses Joints Aperture of High Arch Dam and Its Influencing Factors

作　　者：李梁[1] 周伟[1,2] 常晓林[1,2] 华攸和 王毅[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 [2]武汉大学水工岩石力学教育部重点实验室,湖北武汉430072

出　　处：《水电能源科学》2015年第7期84-88,共5页Water Resources and Power

基　　金：国家重点基础研究发展计划(973计划)课题(2013CB035900);国家自然科学基金优秀青年科学基金项目(51322905)

摘　　要：分析高拱坝横缝开度及其影响因素对于大坝安全意义重大。运用扩展拉格朗日算法的接缝单元,仿真模拟高拱坝施工期的横缝张开过程,并结合大岗山双曲拱坝工程实例,研究了横缝接缝灌浆后普遍出现二次张开的原因和影响因素的影响程度。结果表明,接缝灌浆后横缝二次张开受相邻坝段压水试验、灌浆等施工扰动影响较大,混凝土自生体积变形、徐变、基岩变形模量、悬臂高度、上游面水压均影响横缝开度,可合理解释横缝二次张开现象,为横缝开度仿真模拟提供参考。It is significant to study transverse joint aperture of high arch dam and its influencing factors. The joint el ement method based augmented Lagrange algorithm was used to simulate the open process of transverse joint. Combined with Dagangshan double curvature arch dam, the paper studied the reasons why the secondary open occurred after grou- ting and influencing factors. The results demonstrated that the packer permeability test, grouting and some construction operations were main influencing factors of the secondary open. Besides, autogenousiy volume deformation, creep de- formation, deformation modulus of rocks, the height of cantilever and water pressure also all had obvious impact. By simulation analysis, the paper presented reasonable explanations for the secondary open of transverse joint. Also, this re search could provide references for the future simulations of transverse joint aperture.

关 键 词：高拱坝 接缝单元 二次张开 横缝开度 增开度 

分 类 号：TV52[水利工程—水利水电工程]