明挖基坑对邻近高铁桥梁变形影响因素分析  

Numerical Analysis on Effect Factors of High-speed Railway Bridge Pier Deformation near Foundation Pit

作　　者：宗晶瑶 丰土根[1,2] ZONG Jingyao;FENG Tugen(Key Laboratory for Geotechnical Engineering of Ministry of Water Resource,Nanjing,Jiangsu,210098,China;Research Institute of Geotechnical Engineering,Hohai University,Nanjing,Jiangsu,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,江苏南京210098 [2]河海大学江苏省岩土工程技术工程研究中心,江苏南京210098

出　　处：《河北工程大学学报（自然科学版）》2019年第2期47-50,共4页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(51009054)

摘　　要：以邻近运营高铁桥梁建设的明挖基坑实际工程为背景,采用数值模拟的方法建立了二维有限元模型,探讨了围护结构的插入比、设置内支撑的数量、隔离桩及基坑距高铁桥墩距离四个因素对高铁桥梁变形的影响。结果表明:插入比对桥墩水平位移最大变形及整体沉降影响不大;设置支撑能够减小桥墩水平位移及沉降,增加支撑道数对变形影响小;隔离桩不能减小变形;距离显著影响水平位移和整体沉降,但对沉降差影响不大。Based on foundation pit project near high-speed railway bridge pier in China,a twodimensional finite-element model is established by numerical analysis method,and the influences of four factors on the deformation of high-speed railway bridge piers are discussed:the insertion ratio of envelope structure,inner supports,isolation pile and distance of foundation pit from pier.The results show that the insertion ratio has little effect on the maximum deformation of the horizontal displacement and the overall settlement of the pier;the inner supports can reduce the settlement and horizontal displacement of the pier,increasing the number of inner supports has little effect on deformation;the isolation pile cannot reduce the deformation;distance affects both horizontal displacement and overall settlement,but has little effect on the settlement difference.

关 键 词：基坑 高铁桥墩 水平位移 沉降 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]