复合地基加固的半分离式路堤沉降特性研究  

Study on settlement characteristics of semi-separated embankment based on composite foundation reinforcement

作　　者：张军辉 林晨[1] 杨毅 ZHANG Junhui;LIN Chen;YANG Yi(School of Traffic and Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;Yunnan Research Institute of Highway Science and Technology,Kunming 650051,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]云南省公路科学技术研究院,云南昆明650051

出　　处：《交通科学与工程》2023年第1期7-16,共10页Journal of Transport Science and Engineering

摘　　要：为分析软土地基上半分离式路堤的沉降特性,本研究依托实际工程,结合现场试验结果,建立数值模型,分析不同工程因素对半分离式路堤沉降特性的影响。研究结果表明:半分离式路堤顶面沉降形状为不对称的“碗盆状”曲线,最大沉降点偏向路堤边缘,工后的差异沉降值较整体式路堤的小;分幅距离、分幅高度及路面荷载大小是影响半分离式路堤沉降的主要因素,土工格栅模量对工后最大沉降点的位置有明显影响,合理的桩距设置对于高填方路基的地基沉降稳定有重要作用。To analyze the settlement characteristics of semi-separated embankments on soft soil foundation,based on the actual project and combined with the field test results,a numerical model was established to study the settlement characteristics of semi-separated embankments and analyze the influence of different engineering factors on settlement characteristics.The results indicate that the settlement shape of the semi-isolated embankment's top surface is an asymmetric"bowl-shaped"curve,with the maximum settlement point offset towards the edge of the embankment,and the differential settlement value after construction is smaller than that of the integral embankment.the width and height of the partition as well as the pavement load are the main factors affecting the settlement pattern of the semi-separated embankment.The geogrid modulus has an obvious influence on the position of the maximum settlement point after construction,and reasonable pile spacing plays an important role in the settlement stability of high embankment roadbases.

关 键 词：分离式路堤 沉降特性 数值模拟 

分 类 号：U416.1[交通运输工程—道路与铁道工程]