软土区高架桥下道路施工期对桩基影响分析  

Analysis on the Influence of Pile Foundation during Construction Period of Road under Viaduct in Soft Soil Area

作　　者：邹永诚[1] 罗斌[1] 张亚磊 向敏[2] ZOU Yongcheng;LUO Bin;ZHANG Yalei;XIANG Min(Taizhou Urban and Rural Planning and Design Institute Co.,Ltd.,Taizhou 318002,China;Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]台州市城乡规划设计研究院有限公司,浙江台州318002 [2]石家庄铁道大学,河北石家庄050043

出　　处：《现代信息科技》2022年第8期123-126,共4页Modern Information Technology

摘　　要：软土区在高架桥下道路的施工过程中,桩基的受力特性会产生明显的变化,施工期桩基土体固结沉降,导致桩身上部出现负摩阻力,从而使桩身轴力增大。文章以甬莞高速某高架桥群桩基础为研究对象,监测高架桥及桥下道路施工过程中桩基的轴力变化;采用Midas GTS/NX有限元软件,建立考虑桩-土接触面参数Rinter的数值模型,通过数值模拟结果与监测值对比分析,探究施工工序对高架桥桩基受力特性的影响。During the construction process of the road under the viaduct in soft soil area, force characteristics of pile foundation will produce obvious changes. During the construction period, the consolidation and settlement of pile foundation soil body leads to the appearance of negative friction resistance on the pile upper body, so that the pile body shaft force increases. This paper takes the viaduct pile group foundation of the Yongguan expressway as the research object to monitor the axial force change of the pile foundation during the construction process of the viaduct and the road under the viaduct. It uses Midas GTS/NX finite element software to establish a numerical model considering the parameter Rinter of the pile-soil contact surface, and explores the influence of the construction process on the force characteristics of the viaduct pile foundation through the comparative analysis of the numerical simulation results and the monitoring value.

关 键 词：桩基受力特性 负摩阻力 现场试验 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TU473.1[自动化与计算机技术—计算机科学与技术]