红层填料路堤变形研究-岩石力学与工程学报.pdf

第 26 卷 增 1 岩石力学与工程学报 Vol.26 Supp.1 2007 年 7 月 Chinese Journal of Rock Mechanics and Engineering July ，2007 红层填料路堤变形研究 刘俊新，谢 强，曹新文，胡启军 (西南交通大学 土木工程学院，四川 成都 610031) 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。 关键词：土力学；红层填料；高速铁路；变形；长期沉降；振动 中图分类号：TU 43 文献标识码：A 文章编号：1000 –6915(2007)增 1 –3032 –08 RESEARCHES ON EMBANKMENT DEFORMATIONS OF RED LAYER STUFFING LIU Junxin ，XIE Qiang ，CAO Xinwen，HU Qijun (School of Civil Engineering ，Southwest Jiaotong University ，Chengdu，Sichuan 610031，China) abstract：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 rock ，its 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