掺煤矸石高速铁路路基填料冻胀特性试验研究
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摘要
使用自行研制的单向冻胀试验系统,对高速铁路路基普通填料和掺煤矸石填料进行开放系统和封闭系统条件下的单向冻胀试验。试验结果表明:在冻结过程中掺煤矸石填料与普通填料的温度传导特性相近,总吸水量接近,冻结后水分的分布规律类似;掺煤矸石填料的冻胀量比普通填料稍大,但处于冻胀不敏感范围,且在不补水条件下会大幅减小。在季节性冻土区,对煤矸石废弃物进行产地再利用,采用掺煤矸石填料填筑高速铁路路基,能满足高速铁路路基的冻胀稳定性要求,具有可行性。
A unidirectional frost-heaving test was proposed under open and close systems in this paper.The ordinary subgrade fillers and the special fillers mixed with coal gangue used for high speed railway subgrade were tested by a self-developed unidirectional frost-heaving test system. The test results showthat the properties of the two materials are close in terms of temperature conduction,water absorption and water distribution after freezing. The frost-heaving deformation of the mixed fillers is a bit greater than that of the ordinary fillers.But,it is still in the range of nonfrost susceptible fillers and can be sharply decreased by controlling the water supplement.In seasonal frozen soil region,the coal gangue wastes may be reused in the high speed railway subgrade as fillers.The mixed fillers satisfies the forst-heaving stability requirement of high speed railway.
A unidirectional frost-heaving test was proposed under open and close systems in this paper.The ordinary subgrade fillers and the special fillers mixed with coal gangue used for high speed railway subgrade were tested by a self-developed unidirectional frost-heaving test system. The test results showthat the properties of the two materials are close in terms of temperature conduction,water absorption and water distribution after freezing. The frost-heaving deformation of the mixed fillers is a bit greater than that of the ordinary fillers.But,it is still in the range of nonfrost susceptible fillers and can be sharply decreased by controlling the water supplement.In seasonal frozen soil region,the coal gangue wastes may be reused in the high speed railway subgrade as fillers.The mixed fillers satisfies the forst-heaving stability requirement of high speed railway.
引文
[1]郭彦霞,张圆圆,程芳琴.煤矸石综合利用的产业化及其展望[J].化工学报,2014,65(7):2443-2453.
[2]MASCARO I,BENVENUTI M,CORSINI F,et al.Mine Wastes at the Polymetallic Deposit of Fenice Capanne(Southern Tuscany,Italy). Mineralogy,Geochemistry,and Environmental Impact[J].Environmental Geology,2001,41(3):417-429.
[3]刘春荣,朱彩平.煤矸石在道路工程建设中的应用[J].中国煤炭工业,2001(9):46-46.
[4]徐定成.煤矸石填筑路堤施工[J].铁道建筑技术,2000(2):38-40.
[5]肖雪军,刘淑红.我国煤矸石在道路工程中的应用研究现状[J].科技创新导报,2008(32):12-13.
[6]赵国智,李仲学,刘峰.煤矸石作铁路路基的技术经济分析[J].中国煤炭,2006(03):55-57.
[7]刘荣林.徐州矿区煤矸石作铁路路基的技术经济分析[J].内蒙古煤炭经济,2017(1):149-151.
[8]VALLEJO L E,MAWBY R. Porosity Influence on the Shear Strength of Granular Material-clay Mixtures[J]. Engineering Geology,2000,58(2):125-136.
[9]ZHAO H F,ZHANG L M.Effect of Coarse Content on Shear Behavior of Unsaturated Coarse Granu[J].Canadian Geotechnical Journal,2014,51(12):1371-1383.
[10]CHAMBERLAIN E J.Comparative Evaluation of Frost-susceptibility Tests[M]. Washington:Transportation Research Record,1981.
[11]叶阳升,王仲锦,程爱君,等.路基的填料冻胀分类及防冻层设置[J].中国铁道科学,2007,28(1):1-7.
[12]KONRAD J M,MORGENSTERN N R.The Segregation Potential of a Freezing Soil[J]. Canadaian Geotechnical Journal,1981,18(4):482-491.
[13]KONRAD J M.Freezing-induced Water Migration in Compacted Base-course Materials[J].Canadian Geotechnical Journal,2008,45(7):895-909.
[2]MASCARO I,BENVENUTI M,CORSINI F,et al.Mine Wastes at the Polymetallic Deposit of Fenice Capanne(Southern Tuscany,Italy). Mineralogy,Geochemistry,and Environmental Impact[J].Environmental Geology,2001,41(3):417-429.
[3]刘春荣,朱彩平.煤矸石在道路工程建设中的应用[J].中国煤炭工业,2001(9):46-46.
[4]徐定成.煤矸石填筑路堤施工[J].铁道建筑技术,2000(2):38-40.
[5]肖雪军,刘淑红.我国煤矸石在道路工程中的应用研究现状[J].科技创新导报,2008(32):12-13.
[6]赵国智,李仲学,刘峰.煤矸石作铁路路基的技术经济分析[J].中国煤炭,2006(03):55-57.
[7]刘荣林.徐州矿区煤矸石作铁路路基的技术经济分析[J].内蒙古煤炭经济,2017(1):149-151.
[8]VALLEJO L E,MAWBY R. Porosity Influence on the Shear Strength of Granular Material-clay Mixtures[J]. Engineering Geology,2000,58(2):125-136.
[9]ZHAO H F,ZHANG L M.Effect of Coarse Content on Shear Behavior of Unsaturated Coarse Granu[J].Canadian Geotechnical Journal,2014,51(12):1371-1383.
[10]CHAMBERLAIN E J.Comparative Evaluation of Frost-susceptibility Tests[M]. Washington:Transportation Research Record,1981.
[11]叶阳升,王仲锦,程爱君,等.路基的填料冻胀分类及防冻层设置[J].中国铁道科学,2007,28(1):1-7.
[12]KONRAD J M,MORGENSTERN N R.The Segregation Potential of a Freezing Soil[J]. Canadaian Geotechnical Journal,1981,18(4):482-491.
[13]KONRAD J M.Freezing-induced Water Migration in Compacted Base-course Materials[J].Canadian Geotechnical Journal,2008,45(7):895-909.