粘土复合地基中桩初始剪应力特性分析与沉降计算方法  

Analysis of initial shear stress characteristics and settlement calculation method of piles in clay composite foundation

作　　者：李文新 LI Wenxin(Fujian Geotechnical Engineering Investigation and Research Institute Co.,Ltd.,Fuzhou 350108,China)

机构地区：[1]福建岩土工程勘察研究院有限公司,福建福州350108

出　　处：《粘接》2024年第8期169-172,共4页Adhesion

摘　　要：为了更加准确计算复合地基中桩的沉降,对其计算方法展开了研究讨论。回顾了桩的沉降和地基不均匀沉降研究进展,然后根据已有文献讨论了三折线桩侧初始剪应力,复合地基的特性以及桩在复合地基中的沉降计算过程,最后对复合地基中考虑桩侧初始剪应力的桩基不均沉降计算方法的特点进行了分析讨论并提出办法。结果表明,复合地基中各项计算指标与土体厚度没有明显关系。提出减小桩基沉降计算方法中位移假定误差的方法,分析说明三折线模型中初始位移计算误差的影响,桩段划分数量的影响和三折线模型中位移随时间变化图。In order to calculate the settlement of pile in composite foundation more accurately,the calculation meth⁃od was studied and discussed.The research progress of pile settlement and foundation differential settlement was re⁃viewed.Then the initial shear stress of the pile side,the characteristics of the composite foundation and the settle⁃ment calculation of the pile in the composite foundation were discussed.Finally,the characteristics of the method for calculating the differential settlement of pile foundation considering the initial shear stress of pile side in com⁃posite foundation were analyzed and discussed,and methods were proposed.The results showed that there was no obvious relationship between the calculation indexes of composite foundation and soil thickness.The method of re⁃ducing the assumed error of displacement in the settlement calculation of Pile Foundation was put forward,and the influence of the initial displacement calculation error,the number of pile segments and the displacement change graph with time in the three-fold line model were analyzed.

关 键 词：初始剪应力 复合地基 沉降计算 三折线模型 位移 

分 类 号：TB16[天文地球—地质学] TQ424.21[天文地球—工程地质学]