针对在软弱地基上进行路堤的拓宽工程中出现不均匀沉降的问题,通过室内物理力学试验确定出地基土和填土的含水量、密度等参数,利用离心模型试验进行不同工况分析。试验结果表明在路堤的拓宽工程中采用管桩加固地基的方法,能够提高地基的承载能力,大大减小不均匀沉降量,增强边坡的稳定性,为实际施工提供了理论支持和试验验证。 In order to solve the problem of uneven settlement in the widening of embankment on soft foundation, the parameters of soil moisture content and density of foundation soil and fill are determined through laboratory physical and mechanical tests. The centrifugal model test is used to analyze the different conditions. The test results show that the method of using pipe piles to reinforce foundation in the widening of embankment can improve the bearing capacity of foundation, greatly reduce the uneven settlement and enhance the stability of slope, and provide theoretical support and experimental verification for practical construction.