超长服役期混凝土坝安全性态评估--以凰窝水库大坝为例  

Assessment of the safety status of concrete dams with an ultra-long service life:a case study of Huangwo reservoir dam

作　　者：周凤杰 徐正飞[2] 张旭漫 ZHOU Fengjie;XU Zhengfei;ZHANG Xuman(Nanjing Hydraulic Research Institute,Nanjing 210000,China;Lianyungang Water Resources Bureau,Lianyungang 222000,China)

机构地区：[1]南京水利科学研究院,江苏南京210000 [2]连云港市水利局,江苏连云港222000

出　　处：《江苏水利》2023年第9期50-54,65,共6页Jiangsu Water Resources

基　　金：江苏省水利科技项目(2021017);中央级公益性科研院所基本科研业务费专项资金项目(Y722003);水利技术示范项目(St722002ZT1)。

摘　　要：随着混凝土坝服役期不断增加,对其进行安全性态评估极为重要。以凰窝水库大坝为例,开展超长服役期混凝土坝安全性态评估研究。通过现场调查分析裂缝成因、扩展趋势对混凝土坝正常运行的影响,进一步计算含裂缝混凝土坝强度及稳定情况,最后对混凝土坝安全性态进行综合评估。结果表明:两种工况下,主、副坝坝踵位置未出现拉应力,坝址处压应力满足规范要求,K值满足规范要求;由爆炸产生的最大应力达4.69×105Pa,发生在大坝的右部顶端,混凝土坝坝顶位置为薄弱部位;凰窝水库大坝最终评估为“三类坝”。With the increasing service life of concrete dams,it is very important to evaluate its safety.Taking Huangwo reservoir dam as an example,the safety assessment of concrete dam with ultra-long service life is carried out.Through on-site investigation and analysis of the impact of crack causes and expansion trend on the normal operation of concrete dams,the strength and stability of concrete dams with cracks are further calculated.Finally,the safety of concrete dams is comprehensively evaluated.The results show that under the two working conditions,there is no tensile stress at the heel of the main and auxiliary dams,the compressive stress at the dam site meets the specification requirements,and the K value meets the specification requirements;The maximum stress caused by explosion is 4.69×105Pa,which occurs at the top of the right part of the dam,and the concrete dam crest is the weak part.The Huangwo Reservoir Dam is finally assessed as a“ClassⅢdam”.

关 键 词：混凝土坝 裂缝 超长服役期 安全评估 

分 类 号：TV431[水利工程—水工结构工程]