水利学报2017，Vol.48Issue(10)：1229-1239,11.DOI:10.13243/j.cnki.slxb.20170459
考虑冻土与结构相互作用的梯形渠道冻胀破坏弹性地基梁模型
Elastic foundation beam model of frost heave damage of trapezoidal canal considering interaction between frozen soil and lining stucture
摘要
Abstract
The article proposes a method to calculate frost heave force on lining plates for trapezoidal lining canal in open system by treating frozen soil as Winkler elastic foundation.Through introducing additional term proportional to deformation to reflect reduction of frost heave force caused by frost heaving deformation,differential equations of deflection of the beam on frozen soil are derived.The models of canal bottom and slope plates are established respectively,then analytic formula of deflection,moment and shearing force of both bottom and slope plates are proposed by solving aforementioned equations.By taking a trapezoid canal in Tarim irrigation area as prototype,frost heave displacements of lining plates are calculated.The comparative analysis between the results calculated by the article method,material mechanical and observed value is carried out.The comparative results show that the results calculated by the article method are in accordance with observed value better,and are less than results calculated by material mechanical because of considering reduction of frost heave force caused by frost heaving deformation.The research will be useful for anti-frost design of trapezoidal channel.关键词
冻土工程/灌溉渠道/冻胀/弹性地基梁/挠曲线微分方程Key words
frozen soil engineering/irrigation canal/frost heave/elastic foundation beam/differential equation of deflection curve分类
农业科技引用本文复制引用
肖旻,王正中,刘铨鸿,王羿,葛建锐,王兴威..考虑冻土与结构相互作用的梯形渠道冻胀破坏弹性地基梁模型[J].水利学报,2017,48(10):1229-1239,11.基金项目
国家重点研发计划重点专项(2017YFC0405101) （2017YFC0405101）
国家自然科学基金项目(51279168) （51279168）
国家科技支撑计划(2012BAD10B02) （2012BAD10B02）
教育部博士点基金项目(20120204110024) （20120204110024）
