路堤荷载作用下斜坡地基侧向变形计算分析  

Calculation and analysis of lateral deformation of slope foundation under embankment load

作　　者：刘晓华 韦彬 唐皓 戴智颖 赵炼恒[2] LIU Xiaohua;WEI Bin;TANG Hao;DAI Zhiying;ZHAO Lianheng(Shenzhen Transportation Design&Research Institute,Shenzhen 518003,China;School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]深圳市综合交通设计研究院有限公司,广东深圳518003 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2020年第3期582-591,共10页Journal of Railway Science and Engineering

基　　金：贵州省科学技术厅科技支撑计划重点项目([2018]2815);贵州省交通运输厅科技项目(2017-123-033,2018-123-040)。

摘　　要：为探究斜坡地基在路堤荷载作用下的侧向变形,在Boussinesq和Cerruti集中力下半无限体侧向变形弹性解的基础上,运用积分思想,推导出斜坡地基在路堤荷载作用下的侧向位移。将路堤荷载分解为平行于斜坡和垂直于斜坡2个方向,分别推导出地基在平行和垂直于斜坡的各种荷载下的侧向变形理论解析解,最后依据叠加原理,将平行于斜坡表面和垂直于斜坡表面的荷载引起的侧向变形进行叠加,得出斜坡地基在路堤荷载作用下的侧向变形解析解。研究结果表明:对于斜坡上侧地基的土体,水平荷载引起的侧向变形可在一定程度上减小侧向变形的峰值,但对于斜坡下侧地基土体,水平荷载引起的侧向变形则会增大侧向变形的峰值。In terms of foundation form,the horizontal foundation is mostly studied,but there is little research on slope foundation.In order to research the lateral deformation of slope foundation under embankment load,based on the Boussinesq and Cerruti semi-infinite elastic body under the concentrated force of integral solution of lateral deformation,this paper has deduced the formula of the lateral deformation of slope foundation by using the idea of integration.Firstly,the embankment load was decomposed to be parallel to the slope and vertical to the slope,and then the theoretical solution of the lateral deformation of the foundation under various loads parallel to and perpendicular to the slope was derived.Finally,according to the superposition principle,the lateral deformation of the slope foundation under the embankment load was obtained by superposing the two deformations.The calculation results show that the lateral deformation caused by horizontal load can reduce the peak value of lateral deformation to a certain extent for the soil on the upper side of the slope,but for the soil on the lower side of the slope,the peak value will increase.

关 键 词：斜坡地基 路堤荷载 侧向变形 解析解 

分 类 号：TU433[建筑科学—岩土工程]