摘要
为了研究湿陷性黄土地层隧道基底受力与变形性状及湿陷变形问题,依托室内大型物理模型,通过数值方法系统研究基底浸水和未浸水工况下基底受力和变形性状。结果表明:在基底加固前后,基底应力最大区域均位于墙脚,应力沿横向和纵向都有增大趋势;加固前后基底土体变形规律基本一致;桩体在黄土隧道复合地基中承担大部分荷载,桩土应力比为4~8;加固地基能有效控制浸水条件下衬砌结构的整体沉降。
To study the stress and deformation characteristics and its collapsible deformation of the tunnel basement in collapsible loess stratum,based on the indoor large-scale physical model,the stress and deformation behavior of the basement under the condition of immersion and non-immersion was systematically studied by numerical method.Results showed that the maximum area of the basement stress was located at the foot of the wall before and after the foundation reinforcement,and the stress increased along the transverse and longitudinal directions.The deformation law of base soil before and after reinforcement was basically the same.In the composite foundation,the pile beared most of the load,and the pile-soil stress ratio was between 4 and 8.The foundation reinforcement could effectively control the overall settlement of the lining structure under the condition of immersion.
作者
王武刚
胡昆昆
李又云
刘路路
WANG Wugang;HU Kunkun;LI Youyun;LIU lulu(China Railway Tunnel Consultants Co.Ltd.,Guangzhou 511466,China;School of Highway,Chang’an University,Xi’an 710064,China;Institute of Geotechnical Engineering,Southeast University,Nanjing 211189,China)
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2022年第6期664-674,共11页
Journal of Nanjing Tech University(Natural Science Edition)
基金
特殊地区公路工程教育部重点实验室开放基金(300102212510)。
关键词
黄土隧道
浸水作用
受力与变形性状
数值分析
地基加固
衬砌结构
旋喷桩复合基底
loess tunnel
immersion
stress and deformation characteristics
numerical analysis
foundation reinforcement
lining structuge
rotary jet grouting pile composte basement
