锦屏二级闸门安装的数值计算与施工技术  

A Numerical Simulation of the Water Gate at Jinping-Ⅱ Hydropower Station and Its Construction Technology

作　　者：申嘉荣 袁艳玲[1] 郭霓[1] 姚强[1] 李洪涛[1] 梁涛[2] 

机构地区：[1]四川大学水利水电学院,成都610065 [2]中国水利水电第五工程局有限公司,成都610066

出　　处：《中国农村水利水电》2014年第12期148-151,156,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51009104);大学生创新创业训练计划国家级项目(201410610069)

摘　　要：根据防洪度汛要求,2011年5月底锦屏二级水电站拦河闸坝必须具备过流条件,弧形闸门施工工期紧张,鉴于传统安装程序受混凝土等强的限制,经论证后采用"先安装后锚索张拉"的弧形闸门安装技术,即:先进行弧形闸门安装,后进行预应力锚索张拉。该方案的关键是:锚索张拉后,闸墩锚固块变形是否满足工程需求及变形的调整问题。通过对预应力锚索张拉后闸墩变形进行数值计算分析,得到锚固块平行主锚索张拉方向和垂直闸墩方向的最大变形分别为2.9和3.0mm,该变形产生的影响可利用铰座的结构设计特点消除。施工中监测得到相应方向的最大变形分别为2.35和2.87mm,与计算值基本符合,证明该方案具有较强的可操作性,可为类似工程闸门的安装提供参考。According to the requirements of flood control,Jinping-II Hydropower Station project sluice must have the flow conditions before the end of May 2011.The construction period of radial gate is tight.In addition,traditional installation program is bound by equal strength concrete restrictions.After a careful argument,we decided to use the technology-＂installed before the anchor cable stretch-draw＂,which is the radial gate installed before the pre-stressed anchor cable stretch-draw.The key problem is whether the deformation of anchorage block after anchor cable stretch-draw meets the engineering requirements and adjustment of the deformation..The calculation results show that the deformations of parallel to the direction of main anchor cable stretch-draw and perpendicular to the direction of the pier are 2.9and 3.0mm.The impact of the deformation can be eliminated by using the structure and design features of hinged support.The corresponding deformations monitored in construction are 2.35 and 2.87 mm,which are in line with the calculated value.It turns out that the method has strong operability and serves as a reference for the installation of similar engineering gates.

关 键 词：锚索 弧形闸门 数值计算 变形监测 变形调整 

分 类 号：TV663.2[水利工程—水利水电工程]