摘要
对于高速铁路而言,路基的变形分为3类:(1)运营阶段行车引起的基床累积下沉;(2)列车行驶中路基面的弹性变形;(3)路基本体填土及地基的压密下沉。而红层填料工程性质较差,易崩解,强度低。将红层粉碎到粒径小于2 mm,压实度为95%,并对基床采用3种不同的方法强化结构,通过室内蠕变和振动试验,对路堤的长期沉降和振动作用下的变形进行分析,论证采用红层作为填料在经过一定的施工工艺后能满足高速运营的要求。
For high-speed railway,deformations of embankment are divided into three categories：（1） residual deformations due to loading of train during transport operation;（2） elastic deformations due to loading of train during transport operation;and（3） consolidation of embankment and foundation.As to red layer,which belongs to weak rocki,ts engineering properties are unfavorable bad because that it is easy to collapse,and its strength is very low.Based on results of long-term static test of simple compression without confining pressure,in which the grain size of sample is less than 2 mm and compacting degree is about 95%,permanent settlement can be predicted by numerical algorithm.At the same time,subgrade is reinforced by vibration test of embankment in laboratory;and deformations of dynamic load are estimated.It is proved that red layer can be served as filling with a certain construction methods;and deformations in permanent operation are under control.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第A01期3032-3039,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
铁道部科学基金项目(2004G026)
关键词
土力学
红层填料
高速铁路
变形
长期沉降
振动
soil mechanics
red layer stuffing
high-speed railway
deformation
permanent settlement
vibration
