大型倒虹吸合理管节长度研究  

Study on Reasonable Pipe Section Length of Large Inverted Siphon

作　　者：石艳柯 张德康 张家锐 张多新 柯旺 SHI Yanke;ZHANG Dekang;ZHANG Jiarui;ZHANG Duoxin;KE Wang(College of Civil Engineering and Communications,North China University of Water Resources and Electric Power,Zhengzhou 450045,Henan,China;Yunnan Institute of Water&Hydropower Engineering Investigation Design and Research,Kunming 650021,Yunnan,China)

机构地区：[1]华北水利水电大学土木与交通学院,河南郑州450045 [2]云南省水利水电勘测设计研究院,云南昆明650021

出　　处：《水力发电》2021年第4期63-69,73,共8页Water Power

基　　金：河南省科技攻关计划(212102310951,202102310258);水利部堤防安全与病害防治工程技术研究中心开放课题(2019005)。

摘　　要：合理管节长度的确定是大型倒虹吸结构设计、施工与运营的关键问题之一。以某区待建大型倒虹吸为研究对象,考虑管-土相互作用、回填材料固结、地基基础变形等因素的影响,分别建立了15、20 m和25 m共3种管节长度倒虹吸的三维有限元模型,考虑运营期的荷载工况组合,开展了非线性力学分析。对比分析了3种管节长度倒虹吸的整体沉降,管体竖向变形、应力及管节张开量,在此基础上给出了合理管节长度的建议。同时,以建议的管节长度开展了应力分析,指出了其易发生破坏的位置并提出相应的技术措施,为待建倒虹吸的设计与施工以及同类工程实践提供参考。The determination of a reasonable length of pipe section is one of the key issues in the design,construction and operation of a large inverted siphon structure.Taking a large inverted siphon to be built as the research object,and considering the influences of pipe-soil interaction,backfill material consolidation,foundation deformation and other factors,the three-dimensional finite element models of inverted siphon with pipe section lengths of 15 m,20 m and 25 m are established respectively,and the nonlinear mechanical analyses are carried out considering the load condition combination during the operation period.The overall settlement of the inverted siphon,the vertical deformation of the pipe body,the stress and the opening amount of the pipe section of the three kinds of pipe section lengths are compared and analyzed,and on this basis,the reasonable pipe section length is proposed.Simultaneously,the stress analysis is also carried out with the proposed length of the pipe section,and the location where it is prone to damage is pointed out and the corresponding structural measures are put forward to provide reference for the design and construction of the inverted siphon to be built and similar engineering practices.

关 键 词：倒虹吸 管-土相互作用 合理管节长度 变形分析 应力分析 

分 类 号：TV672.5[水利工程—水利水电工程]