软土层厚度差对路基差异沉降的影响数值分析  

Numerical Analysis for Influence of Thickness Difference in Soft Soil Layer on Differential Settlement

作　　者：姜昌武 洪宝宁[1,2] 刘鑫[2,3] 马飞 JIANG Changwu;HONG Baoning;LIU Xin;MA Fei(Key Laboratory of Ministry of Education for Rock Mechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;School of Civil Engineering and Transportation,Hohai University,Nanjing 210098,China;Institute of Tunnel and Underground Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学土木与交通学院,南京210098 [3]河海大学隧道与地下工程研究所,南京210098

出　　处：《河南科学》2019年第1期127-132,共6页Henan Science

基　　金：国家自然科学基金青年基金(51609071);中央高校基本科研业务费专项(2018B13714);广东省交通运输厅科技项目(科技-2015-02-015;科技-2015-02-013)

摘　　要：针对高速公路修建中软土路基存在差异沉降的问题,采用有限元数值模拟方法,并结合现场实测数据验证,研究了因软土层厚度不同引起的差异沉降以及各软基处理阶段(路堤填筑阶段、预压阶段)的差异沉降速率变化规律.分析结果表明,软土厚度的变化对路基的差异沉降具有较大的影响,同时进一步证明超载预压能有效控制差异沉降.In this paper,aiming at the problem of differential settlement on soft soil roadbed during highway construction,the differential settlement caused by the soft soil layer thickness and the variation law of differential settlement rate in each soft foundation treatment stage of filling stage and preloading stage are studied by using the finite element numerical simulation method and field test data.The analysis results show that the change of soft soil layer thickness has a great influence on the differential settlement of the subgrade,and further prove that the overload preload can effectively control the differential settlement.

关 键 词：软土路基 数值模拟 软土层厚度差 差异沉降 

分 类 号：TU447[建筑科学—岩土工程]