白鹤滩水电站左岸缆机基础桩基承载特性分析

Analysis on bearing capacity of pile foundation in left bank cable crane foundation of Baihetan hy⁃dropower station

结合白鹤滩水电站左岸缆机基础工程,介绍了缆机平台及覆盖层段桩基的设计。利用MIDAS-GTS非线性有限元分析软件对左岸低缆覆盖层段3根较有代表性的桩基的承载特性进行了数值模拟,得到了桩基在缆机正常运行最不利工况下的最大水平位移和竖向位移。同时,对比分析了是否考虑土体非线性、桩土接触面、覆盖层土体作用、坡顶荷载等因素对计算结果的影响,相关成果可为类似工程提供借鉴。

Combined with the cable crane foundation project on left bank of Baihetan hydropower sta⁃tion,the paper introduces the design of the cable platform and the pile foundation in the overburden.The MIDAS-GTS nonlinear finite element analysis software is used to simulate the bearing characteris⁃tics of three representative pile foundations in the overburden for low cable crane on the left bank and the maximum horizontal displacement and vertical displacement of the pile foundation under the most unfavorable working conditions are obtained.At the same time,the paper analyzes the influence of soil nonlinearity,pile-soil contact surface,overburden soil effect,slope load and other factors on the calcula⁃tion results,which can provide reference for similar projects.