谷幅收缩变形对拱坝应力状态影响分析  

Stress Impact Analysis of Valley Shrinkage Deformation on Arch Dam

作　　者：刘有志[1] 相建方 樊启祥[2] 李金桃[1] 马晓芳[1] 

机构地区：[1]中国水利水电科学研究院结构材料所,北京100038 [2]中国长江三峡集团公司,北京100038

出　　处：《水电能源科学》2017年第2期100-103,共4页Water Resources and Power

基　　金：国家重点基础研究发展计划(973计划)(2013CB036406;2013CB035904);十二五科技支撑项目(2013BAB06B02);国家自然科学基金项目(51579252);中国水科院科研专项;流域水循环模拟与调控国家重点实验室科研专项

摘　　要：针对西南地区某特高拱坝蓄水后出现较为明显的谷幅收缩现象,在对大坝施工全过程进行跟踪仿真模拟的基础上,对比分析了考虑及不考虑谷幅收缩变形的影响。研究结果表明,仅考虑常规荷载条件下的大坝具有较大的安全裕度,库岸边坡出现60mm左右的谷幅收缩变形时,大坝安全风险仍然可控。若后期谷幅收缩变形进一步增大,则应尽量将上游水位维持在相对较高水平,尤其是低温季节,以确保大坝工程安全受控。An ultra-high arch dam appeared an obvious valley shrinkage deformation after impoundment in the southwest region.Based on the simulation of all the construction process,this paper analyzed the influence of with and without the shrinkage deformation.The results show that the dam has a large margin of safety in the normal load conditions,and when the shrinkage deformation changes to around 60 mm,the dam safety risks remain controllable.If the valley shrinkage deformation further raises in the later period,it should be keep high upstream water level so as to ensure the safety of dam project to be controlled,especially in the low temperature season.

关 键 词：水工结构 特高拱坝 谷幅变形 应力状态 风险评估 

分 类 号：TV31[水利工程—水工结构工程] TV698.1