摘要
依托明巢高速公路分离式加筋土桥台工程原型监测,用FLAC2D软件建立桥台数值模型,并将数值模拟得到的桥台受力及变形情况与桥台原型监测结果进行对比验证.考虑到填料类型及其压实工序与填料力学性能的相关性,模拟分析了填料内摩擦角对加筋土桥台工作性能的影响.结果表明:随着填料内摩擦角的增大,分离式桥台的水平土压力和竖向土压力都有所减少,并且竖向位移、水平位移及筋材应变也有所减少;当填料内摩擦角增大到一定程度时,其对承载性能的优化作用有所减少;工程中选取加筋土填料时,根据现场施工情况确定填料的内摩擦角,并权衡工作性能及经济效益,做出合理的选择.
Based on the prototype monitoring of the separated reinforced soil abutment project of Mingchao Expressway,the numerical model of the bridge abutment was established by FLAC 2D software,and the force and deformation of the bridge abutment obtained from numerical simulation were compared and verified with the prototype monitoring results of the bridge abutment.Considering the correlation among filler type,compaction process and filler mechanical properties,the influence of the filler internal friction angle on the working performance of the reinforced soil abutment was simulated and analyzed.The results show that with the increasing of filler internal friction angle,the horizontal earth pressure and vertical earth pressure of the detached bridge abutment are reduced,and the vertical displacement,the horizontal displacement and the reinforcement strain are also reduced.When the filler internal friction angle is increased to a certain degree,the optimization effect on the bearing performance is decreased.When the reinforced soil filler in the project is selected,the filler internal friction angle should be determined according to the construction conditions on the site,and the performance and economic benefit should be weighed to make reasonable choice.
作者
胥昕怡
徐超
XU Xinyi;XU Chao(College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China)
出处
《江苏大学学报（自然科学版）》
CAS
北大核心
2024年第2期234-241,共8页
Journal of Jiangsu University：Natural Science Edition
基金
安徽省交通运输重点科技项目(2021-KJQD-016)。
关键词
非承重式加筋土桥台
分离式加筋土桥台
数值模拟
填料
内摩擦角
工作性能
non-load bearing reinforced soil abutment
separated reinforced soil abutment
numerical simulation
filler
internal friction angle
working performance
