摘要
依托某市中低速磁浮交通示范线,对比研究U型槽有无顶板的两种新型路基结构型式不同地基处理方式下的变形特点。总结归纳复杂场地磁浮交通路基地基加固处理技术,并通过建立三维有限元模型,证实了新型路基结构及相关地基处理方法的有效性及合理性,对比分析了中低速磁浮交通路基结构静力学行为规律。研究结果表明:需采用合适的地基处理方式以有效减小地基沉降,且U型槽有顶板结构下旋喷桩处理地基效果最佳;同时,两种新型路基结构采用不同地基处理措施的刚度差别不大,均能保证整条线路线下基础的刚度在交界处平滑过渡。
Based on a medium and low speed maglev traffic demonstration line of a city,the deformation characteristics of two new subgrade structures with or without roof of U-groove under different foundation treatment methods are studied.The reinforcement treatment technology of maglev traffic subgrade foundation in complex site is summarized,and the validity and rationality of the new subgrade structure and related foundation treatment method are verified by establishing three-dimensional finite element model,and the statics behavior law of medium and low speed maglev traffic subgrade structure is compared and analyzed.The results show that proper foundation treatment method is needed to effectively reduce the foundation settlement,and the u-groove structure with roof downward rotary jet pile treatment effect is the best.At the same time,the stiffness of the two new subgrade structures with different foundation treatment measures has little difference,which ensures the smooth transition of the stiffness of the whole line at the junction of the foundation.
作者
熊志鹏
李学友
XIONG Zhipeng;LI Xueyou(Key Laboratory of High-speed Railway Line Engineering of Ministry of Education,College of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;The 4th Engineering Co.,Ltd.,China Railway Erju Engineering Co.,Ltd.,Chengdu 610300,China)
出处
《路基工程》
2023年第1期195-200,共6页
Subgrade Engineering
基金
国家自然科学基金项目:中低速磁浮交通新型路基及承轨梁台结构建造技术研究(R10120H283)。
关键词
中低速磁浮
路基结构
地基处理
数值分析
模态分析
medium and low speed maglev
subgrade structure
foundation treatment
numerical analysis
modal analysis
