基于孔压静力触探仪探测数据的路基沉降计算  

Calculation of foundation settlement based on detection data of piezocone penetration tests

作　　者：胡富贵 田小革[2,3] 胡涛 李光耀 郭常辉 HU Fugui;TIAN Xiaoge;HU Tao;LI Guangyao;GUO Changhui(Hunan Construction Engineering Group Communications Construction Co.,Ltd.,Changsha 410004,China;State Engineering Laboratory of Highway Maintenance Technology,Changsha University of Science&Technology,Changsha 410114,China;School of Traffic and Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]湖南建工交通建设有限公司,湖南长沙410004 [2]长沙理工大学公路养护技术国家工程实验室,湖南长沙410114 [3]长沙理工大学交通运输工程学院,湖南长沙410114

出　　处：《交通科学与工程》2022年第4期22-27,共6页Journal of Transport Science and Engineering

基　　金：湖南省交通运输厅科技项目(201905)。

摘　　要：为分析路基的沉降,利用孔压静力触探仪对湖南省某高速公路地基土进行触探试验,依据触探试验数据与土体性能参数间的关系,获得地基土体修正剑桥模型的参数值,建立考虑路基地基土体流固耦合的有限元模型,计算路基在填筑施工过程中的沉降值,并将所得结果与施工期间的实测沉降值进行对比。研究结果表明:利用孔压静力触探试验参数计算的路堤填筑期沉降值与实测沉降值较为吻合,路基沉降主要发生在路基填筑期,且随着路基填筑深度的增加逐渐减小。路基填筑完工1a后,沉降基本稳定。For investigating the subgrade settlement of the foundation,the piezocone penetration test(CPTU)was performed on field penetration at an expressway subgrade in Hunan Province.Based on the relationship between soil parameters and the penetration data,the parameters of the modified Cambridge model of foundation soil was obtained,and the finite element model was then established considering fluid-structure interaction of the foundation soil of subgrade.The settlement of subgrade during filling construction was calculated and compared with the measured value.The results show that the settlement calculated by the CPTU is consistent with the measured settlement,the subgrade settlement mainly occurs in the filling period,and gradually decreases with the increase of the depth.The settlement is basically stable about 1 year after construction.

关 键 词：地基沉降 孔压静力触探 触探参数 流固耦合 

分 类 号：U416[交通运输工程—道路与铁道工程]