大型倒虹吸合理管节长度研究

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...

Study on Reasonable Pipe Section Length of Large Inverted Siphon

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.