存在贯穿性裂缝的浆砌石拱坝病险分析与除险加固方法  

Danger Analysis and Reinforcing of Masonry Arch Dam with Thorough Cracks

作　　者：杨杰[1,2] 米艳芳[1] 张孝义 帅武文 许玉成 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]丹凤县水利水土保持局,陕西商洛726200

出　　处：《西安理工大学学报》2009年第3期297-301,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(50779051);水资源与水电工程科学国家重点实验室开放基金资助项目(2007B037);陕西省教育厅专项科研计划基金资助项目(07JK354);西安理工大学科学研究基金资助项目(106-210509)

摘　　要：针对浆砌石拱坝的贯穿性裂缝病险分析及其除险加固问题进行了研究。鉴于浆砌石拱坝出现贯穿性裂缝后,坝体不能再按整体受力结构进行稳定与强度分析,提出了"以裂缝底部高程为界分段计算"的分析方法,上部"裂缝段坝体"按悬臂梁结构计算,下部"非裂缝段坝体"仍按拱坝结构分析,并按重力等效原则对容重进行重新分配,确保坝体分段后的静力荷载等效。实例结果表明,采用坝体分段计算方法能更客观地反映拱坝出现贯穿性裂缝后的实际状况,说明所提出的分段计算思路是合理可行的。The problem of danger analysis and reinforcing of masonry arch dam with thorough cracks are studied in this paper. After the masonry arch dam having the thorough cracks, the dam body can be no longer analyzed as an integral structure subject in terms of its stability and strength. For this reason, this paper suggests an analysis method of ＂bisectional calculation with the bottom elevation of cracks as the boundary＂. Accordingly, the upper ＂ cracked section of dam body＂ is calculated as the cantilever beam structure, while the lower ＂non-cracked section of dam body＂ is calculated as arch dam structure. The bulk density is redistributed in terms of the principle of gravity equivalence so as to ensure the static loading equivalence after the dam bisection. The results from the real examples indicate that the adoption of the calculation method of dana body bisection can objectively reflect the real situations of arch dam with thorough cracks, whereby demonstrating that the bisectional calculation thinking suggested is feasible and practical.

关 键 词：坝体裂缝 浆砌石拱坝 稳定分析 应力分析 病险水库 

分 类 号：TV698[水利工程—水利水电工程]