多泥沙淤积对高混凝土拱坝温度应力的影响研究  

Study on the influence of sediment deposition on temperature stress of high concrete arch dam

作　　者：李松辉[1] 肖宏武 雒翔宇 李萌 LI Songhui;XIAO Hongwu;LUO Xiangyu;LI Meng(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Shaanxi Dongzhuang Water Control Project Construction Co.Ltd,Xi'an 713200,China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]陕西省东庄水利枢纽工程建设有限责任公司,陕西西安713200

出　　处：《中国水利水电科学研究院学报（中英文）》2022年第2期104-111,共8页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家重点研发项目(2018YFC0406704);陕西省水利科技项目(2019slkj-B2);中国水利水电科学研究院基本科研业务费专项项目(ss0145b932017)。

摘　　要：在黄河等多泥沙河流上修建高混凝土拱坝,泥沙淤积对库水温必会产生一定影响,进而影响大坝稳定温度场及温度应力。基于上述问题,以泾河下游峡谷出口东庄水库230 m级高混凝土拱坝为研究对象,利用库水温计算方法和大坝仿真分析法,通过考虑坝前有无淤沙的工况,分析不同淤沙情况下的大坝水库水温、稳定温度场和温度应力。结果表明,与坝前无泥沙淤积工况比较,坝前泥沙淤积时可提高库底水库水温,从而提高坝体稳定温度场、降低坝体温度应力。从温控防裂方面反映出库底淤沙对坝体稳定的有利作用,该研究成果可为多泥沙河流坝体温控设计提供一定的参考意义。Sediment deposition is one of the factors affecting the temperature control and crack prevention of concrete dams.When high concrete arch dams are built on muddy rivers such as the Yellow River,sedi⁃ment deposition will certainly affect the water temperature of the reservoir,and then affect the stable tem⁃perature field and temperature stress of the dam.Based on the above problems,this study takes a 230m high concrete arch dam downstream of Jinghe River as the research object.The numerical analysis of reser⁃voir water temperature and the finite element simulation calculation method are used to simulate and ana⁃lyze the dam reservoir water temperature,stable temperature field and temperature stress under different working conditions by considering whether there is silt in front of the dam.The results show that compared with the condition without sediment deposition in front of the dam,the water temperature at the bottom of the reservoir increases when the sediment is deposited in front of the dam,which improves the stable tem⁃perature field of the dam body and reduces the temperature stress of the dam body.From the perstpective of temperature control and crack prevention,the favorable effect of silt on dam stability is reflected.The re⁃search results can provide some reference for the load design of dam body in the river with sediment.

关 键 词：多泥沙淤积 水库水温 稳定温度场 温度应力 

分 类 号：TV642[水利工程—水利水电工程]