输电线路承台桩受力分析及优化设计研究

Research on the stress analysis and optimization design of the overhead transmission line cap pile

首先对承台桩基内力的计算方法原理进行总结和说明,包含了规范简易公式、等代框架法、承台-桩-土协同作用计算法、有限元法等。其次针对架空输电线路基础受荷特点,研究适用输电线路行业承台桩的适用计算方法并且用Midas有限元进行模拟验证。此外,由于输电线路基础承台桩内力分布一般不均匀,本文拟针对承台桩基进行优化设计,包括承台旋转、立柱偏心、梯形承台桩、长短桩、斜桩等,以期得到良好的经济效益和社会价值。

The calculation methods and principles of the internal force of the pile foundation of cap are firstlysummarizedand explained,including the simple formula of“code”,equivalent frame method,cap-pile-soil synergy calculation method,finite element method,etc.Secondly,according to the load characteristics of the overhead transmission line foundation,the calculation method of the pile cap for transmission line industry is studied,Midas finite element method is used to verify the simulation.In addition,because the distribution of internal force of transmission line foundation cap pile is generally not uniform,this paper intends to optimize the design of cap pile foundation,including cap rotation,column eccentricity,trapezoidal cap pile,long and short pile,inclined pile and so on,in order to get good economic benefits and social values.