文章编号：1004－5422(2021)04－0430－06

DOI:10.3969/j.issn.1004-5422.2021.04.016

微型桩筏基础轴向刚度的计算方法

赵心涛，孙曰波，李亚男

（潍坊职业学院  农林科技学院，山东  潍坊 261041）

摘   要：微型桩筏基础轴向刚度的计算对微型桩的设计有十分重要的意义.为更好地指导工程实践，以相关研究的离心试验结果为原型，采用单因子变量法和三维有限元分析方法，研究了多个变量对微型桩筏基础轴向刚度的影响规律，并根据计算结果对一般桩筏基础的轴向刚度计算公式进行改进，形成了微型桩筏基础的轴向刚度计算公式及计算流程，并且对轴向刚度计算公式进行了验证.结果表明，该公式计算微型桩筏基础轴向刚度误差较小，可以满足工程设计工作的需要.

关键词：微型桩筏基础；轴向刚度；计算公式；有限元

中图分类号：TU473.1         文献标识码：A

Calculation Method of Axial Stiffness of Micro Pile Raft Foundation

ZHAO Xintao,SUN Yuebo,LI Yanan

(College of Agriculture and Forestry Science and Technology of Weifang Vocational College,Weifang 261041,China)

Abstract：The calculation of axial stiffness of micro pile raft foundation is very important for the design of micro pile. In order to better guide the engineering practice,the previous centrifugal test results are taken as the prototype,and the single factor variable method and three-dimensional finite element analysis method are used to study the influence of multiple variables on the axial stiffness of micro pile raft foundation.The calculation formula and process of axial stiffness of micro pile raft foundation are formed,and the calculation formula of axial stiffness is verified. The results show that the error of axial stiffness of micro pile raft foundation calculated by the formula is small,which can fully meet the needs of engineering design. It is suggested that the formula can be used for reference in the future design work.

Key words：micro pile raft foundation;axial stiffness;calculation formula;finite element method