加筋碎石桩复合地基工作状态影响因素分析

Analysis of Influencing Factors of the Working State of Reinforced Gravel Pile Composite Foundation

为制定合理的软土地基加筋碎石桩处治方案,采用有限元软件进行数值模拟分析。通过对比不同条件下的复合地基沉降量计算结果,分析不同因素对复合地基工作状态的影响。研究认为:在考虑经济性的情况下,建议桩土模量比选择为25,加筋体刚度取800kN/m,加筋体长度取1/2 H,并优先选择内摩擦角大的碎石。

In order to formulate the reasonable treatment scheme for reinforced gravel piles in soft soil foundation,the numerical simulation analysis is made by utilizing the finite element software.By comparing the calculation results of composite foundation settlement under different conditions,the influence of different factors on the working state of composite foundation is analyzed.The research shows that:under the condition of considering economy,it is recommended to select the pile-soil modulus ratio as 25,the stiffness of the reinforced body as 800 kN/m,the length of the reinforced body as 1/2 H,and the crushed stone with large internal friction angle is preferred.