摘要
以成都某轨道交通盾构区间下穿有轨电车为例,结合成都砂卵石地层特点,通过MIDAS GTS数值模拟软件,对盾构区间下穿有轨电车路基的沉降影响进行综合分析研究。结果表明:盾构隧道下穿有轨电车路基时,不考虑地基加固,最大沉降量为12.3 mm;考虑采用CFG桩复合地基加固时,最大沉降量为7.5 mm。完全满足有轨电车无砟轨道平顺性及沉降要求,为工程实施提供设计参考。
Taking Chengdu some rail transit shield interval crossing underneath the tram as an example,combined with Chengdu regional characteristics of the sand & gravel strata,through the MIDAS GTS numerical simulation software,the settlement influence of shield interval crossing underneath tram subgrade is made comprehensive analysis research.The results show that the shield tunnel crossing underneath the tram subgrade,without considering the foundation reinforcement,the max settlement is about 12.3 mm; considering the reinforcement of CFG pile composite foundation,the max settlement is about 7.5 mm; which can meet the requirements totally of tram ballastless track smoothness and settlement and can provide design reference for similar projects.
出处
《中国市政工程》
2017年第5期26-29,共4页
China Municipal Engineering
关键词
轨道交通盾构区间
下穿
有轨电车
路基沉降
rail transit shield interval
underneath pass
tram
foundation settlement
