铁道科学与工程学报2018，Vol.15Issue(2)：302-309,8.
高速铁路混凝土排桩减隔振效果研究
The research on the vibration isolation effect about concrete pile in high speed railway
摘要
Abstract
In order to study the vibration isolation effect of concrete single row piles applied in high-speed railway, a numerical model was established which combined the finite element boundary and infinite element boundary. The vibration isolation effect was then investigated based on the perpendicular method. The results indicate that the finite element method which the infinite element boundary combined with the finite element boundary can effectively reflects the actual effectiveness about the reduce vibration isolation measures. The soil acceleration attenuation rate behind piles is 39.7%~75.8% by setting the concrete single row piles, so setting up the concrete single row piles can improve the effect of vibration isolation. The deeper of the pile depth, the better of the vibration isolation performance. With the increase of the depth, velocity attenuation rate is increased by 6.5%~24.2%. As the single pile section size increases the effect of vibration isolation, and velocity attenuation rate is increased by 6.5%~11.5%. The pile spacing doesn't affect obviously on the effect of reducing vibration isolation, with the different pile spacing, velocity attenuation rate only changed by 0.2%~2.2%. Through the perpendicular method we can choose the optimal solution pile section size 25 cm×25 cm, the depth of pile is 15 m, and the spacing of piles is 0.5 m.关键词
高速铁路/混凝土桩/数值分析/正交试验Key words
high speed railway/concrete pile/numerical analysis/orthogonal test分类
建筑与水利引用本文复制引用
刘晶磊,张瑞恒,冯桂帅,王一峰,于川情..高速铁路混凝土排桩减隔振效果研究[J].铁道科学与工程学报,2018,15(2):302-309,8.基金项目
河北省青年拔尖人才计划资助项目(BJ2016018) （BJ2016018）
张家口市科技局科技计划资助项目(1511074B) （1511074B）
