脏污材质对散体道床剪切力学性能影响的试验研究  

Experiment research of shear behavior of railway ballast influenced by different fouling materials

作　　者：高亮[1,2] 徐旸[1,2] 殷浩[1,2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京交通大学轨道工程北京市重点实验室,北京100044

出　　处：《北京交通大学学报》2017年第1期1-6,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金重点项目(U1234211);国家自然科学基金面上项目(51578053;51578055);中央高校基本科研业务费(C15RC00120);北京市科技新星计划(XX2013012)~~

摘　　要：道床脏污会影响道床的剪切力学特性.为揭示脏污材质对道床剪切力学性能的影响规律,通过自主研发的大型铁路碎石道砟直剪仪,对道砟集料进行直剪试验.分析了不同道床脏污材质及脏污程度对道床平均剪应力、最大剪应力和最大剪胀位移等参数的影响.研究结果表明,煤灰和黄沙所构成的道床脏污均会使散体道床剪切力学性能显著降低;煤灰脏污对散体道床剪切力学性能的削弱作用比黄沙脏污更明显.Ballast fouling will affect the shear behavior of ballast bed. In order to reveal the influ-encing regularity of fouling materials on the shear behavior of railway ballast, a large scale direct shear apparatus dedicated for railway ballast was developed, and direct shear tests were conduc-ted to study the effects of different ballast fouling materials and different ballast fouling ratios on average shearing stress, the maximum shearing stress and the maximum shear dilatation dis-placement of ballast. The results show that both the coal ash fouled ballast and the sand fouled ballast result in poor shear mechanical characteristics of ballast bed. And the effects of coal ash is larger than sand in terms of reducing the shear behavior of ballast bed.

关 键 词：散体道床 道床脏污 直剪试验 力学性能 

分 类 号：U213.7[交通运输工程—道路与铁道工程]