羑河渠道大型倒虹吸结构三维有限元分析  

3-D Finite Element Analysis of You River Large Inverted Structure

作　　者：张淙皎[1] 马军 骆原[1] 司建强[1] 

机构地区：[1]华北水利水电学院,河南郑州450011 [2]郑州市水利建筑勘测设计院,河南郑州450007

出　　处：《人民黄河》2011年第7期110-111,115,共3页Yellow River

摘　　要：羑河渠道倒虹吸是南水北调中线总干渠大型穿河建筑物,受天然河道及总干渠高程影响,羑河倒虹吸水平管身顶部填土厚度大,管内承压水头高,对管身应力状态有重要影响。应用三维有限元方法,对该倒虹吸结构在不同荷载组合下的应力状态进行了计算分析,结果表明:渠道设计水位、一侧边孔检修、河道枯水位时出现最大拉、压应力,设计时应把此工况作为控制工况;模型与实际建筑物结构工作情况不完全一致,底板底部应力分布不均,在边缘部位出现较大压应力集中,但随基础沉降应力会逐渐消散。The inverted siphon of You he River channel is a large-scale cross-river buildings of the main canal of the Middle Route of South to North Water Transfer Project.As the influence of the nature river course and the elevation of the main canal,the top of the horizontal body of the inverted siphon has thick filled soil and high confined water head,which will impact the pipe＇s stress state significantly.By applying 3-D finite element method,it analyzed the stress state of the inverted siphon structure under different load combinations.The results show that the design water level of the channel,one side hole recondition,and low water level are the key point where the maximum tensile or compressive stress grow,so this condition should be designed as the control condition;the structure model and the practical work are different,the bottom stress distribution of the baseboard is uneven and it appears larger pressure stress concentration in the edge parts,but as the settlement of the base,it will wear off.

关 键 词：水工结构 三维有限元 应力 位移 羑河倒虹吸 南水北调中线工程 

分 类 号：TV672[水利工程—水利水电工程]