季节性冻土区路基土体冻胀影响因素灰色关联分析
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摘要
以整治青藏铁路环青海湖段季节性冻土区路基冻害为背景,通过现场采集典型分布的粉质黏土,考虑温度、含水率、含盐量(质量分数)、压实度四个因素,进行室内冻胀正交试验,测试了不同温度环境下路基土体的冻胀率,进行正交试验的极差分析和方差分析,建立灰色关联度分析模型,分析各因素对冻胀影响的主次关系。结果表明,正交试验分析和灰色关联度分析所得规律一致,影响冻胀因素由主到次依次为温度、含盐量、含水率和压实度,因素之间的交互作用影响较小可以忽略;温度和含盐量对冻胀影响非常显著,含水率对冻胀有显著影响,压实度和其他3个因素之间的交互作用对冻胀没有显著影响。
Aiming at the roadbed frost damage of the seasonal frozen soil area around the Qinghai Lake section of Qinghai Tibet Railway,the typical distributed silty clay is collected focusing attention on the four factors:temperature,moisture,salinity,and compaction so as to conduct the indoor frost heave orthogonal test. The frost heave rates of subgrade soil under different temperatures have been tested,and the gray correlation degree analysis model is established to carry out the range analysis and variance analysis of orthogonal experiment. Then the influence of various factors on the frost heave is analyzed. The results show that the orthogonal test analysis and gray correlation analysis have the same law,and that the factors affecting the frost heaving are mainly temperature,salt content,water content,and compaction. The interaction between the factors is negligibly tiny,but the effect of temperature,salinity and water content on the frost heave is very significant. On the contrary,the interaction between compaction and factors has no significant effect on frost heave.
Aiming at the roadbed frost damage of the seasonal frozen soil area around the Qinghai Lake section of Qinghai Tibet Railway,the typical distributed silty clay is collected focusing attention on the four factors:temperature,moisture,salinity,and compaction so as to conduct the indoor frost heave orthogonal test. The frost heave rates of subgrade soil under different temperatures have been tested,and the gray correlation degree analysis model is established to carry out the range analysis and variance analysis of orthogonal experiment. Then the influence of various factors on the frost heave is analyzed. The results show that the orthogonal test analysis and gray correlation analysis have the same law,and that the factors affecting the frost heaving are mainly temperature,salt content,water content,and compaction. The interaction between the factors is negligibly tiny,but the effect of temperature,salinity and water content on the frost heave is very significant. On the contrary,the interaction between compaction and factors has no significant effect on frost heave.
引文
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[2]王青志,刘建坤,田亚护,等.寒区级配碎石冻胀正交试验研究[J].岩土力学,2015,36(10):2825-2830,2836.(WANG Qingzhi,LIU Jiankun,TIAN Yahu,et al.A study of orthogonal design tests on frost-heaving characteristics of graded crushed rock[J].Rock and Soil Mechanics,2015,36(10):2825-2830,2836.(in Chinese))
[3]张远芳,慈军,肖俊.灰色关联优势分析在冻土中的应用[J].水利与建筑工程学报,2006,4(1):12-14.(ZHANG Yuanfang,CI Jun,XIAO Jun.Application of grey link advantage analysis in frozen soil[J].Journal of Water Resources and Architectural Engineering,2006,4(1):12-14.(in Chinese))
[4]鲍俊安,杨平,陈成.基于灰色关联优势分析冻胀融沉影响因素研究[J].路基工程,2012(1):21-23.(BAO Jun’an,YANG Ping,CHEN Cheng.Research on factors influencing frost heaving and thaw collapsing based on grey relational preponderance analysis[J].Subgrade Engineering,2012(1):21-23.(in Chinese))
[5]王社.影响路面基层强度因素的灰关联度分析[J].华东公路,1996(1):28-30.(WANG She.Gray correlative degree analysis of factors affecting pavement strength[J].East China Highway,1996(1):28-30.(in Chinese))
[6]张莎莎,王永威,杨晓华,等.砂类亚硫酸盐渍土盐胀率预报模型[J].长安大学学报(自然科学版),2016,36(6):10-16.(ZHANG Shasha,WANG Yongwei,YANG Xiaohua,et al.Salt expansion rate prediction model of sand sulfite saline soil[J].Journal of Chang’an University(Nature Science Edition),2016,36(6):10-16.(in Chinese))
[7]高江平,吴家惠.硫酸盐渍土盐胀特性的单因素影响规律研究[J].岩土工程学报,1997,19(1):39-42.(GAOJiangping,WU Jiahui.Study on laws of the single factor effect upon heaving properties of the sulphated salty soil[J].Chinese Journal of Geotechnical Engineering,1997,19(1):39-42.(in Chinese))
[8]万旭升,廖孟柯,杜立群.温度对硫酸钠盐渍土盐胀影响的试验研究[J].公路交通科技,2016,33(8):44-50.(WANXusheng,LIAO Mengke,DU Liqun.Experimental study on influence of temperature on salt expansion of sodium sulfate saline soil[J].Journal of Highway and Transportation Research and Development,2016,33(8):44-50.(in Chinese))
[9]鲍硕超.吉林西部季冻区盐渍土冻胀特性及三维颗粒流数值模拟[D].吉林:吉林大学,2015.(BAO Shuochao.Frost heaving characteristics and three-dimensional particle flow numerical simulation of saline soil in seasonal frozen area of Western Jilin[D].Jilin:Jilin University,2015.(in Chinese))
[10]包卫星,杨晓华,谢永利.典型天然盐渍土多次冻融循试验研究[J].岩土工程学报,2006,28(11):1991-1995.(BAOWeixing,YANG Xiaohua,XIE Yongli.Research on salt expansion of representative crude saline soil under freezing and thawing cycles[J].Chinese Journal of Geotechnical Engineering,2006,28(11):1991-1995.(in Chinese))
[11]顾强康,吴爱红,李宁.硫酸盐渍土的盐胀特性试验研究[J].西安理工大学学报,2009,25(3):283-287.(GUQiangkang,WU Aihong,LI Ning.Experimental researches and analysis of expansion characteristics of sulphate salty soil[J].Journal of Xi’an University of Technology,2009,25(3):283-287.(in Chinese))
[12]武立波,祁伟,牛富俊,等.我国季节性冻土区公路路基冻害及其防治研究进展[J].冰川冻土,2015,37(5):1283-1293.(WU Libo,QI Wei,NIU Fujun,et al.A review of studies on roadbed frozen damage and countermeasures in seasonal frozen ground regions in China[J].Journal of Glaciology and Geocryology,2015,37(5):1283-1293.(in Chinese))
[13]张玉芝,杜彦良,孙宝臣,等.季节性冻土地区高速铁路路基冻融变形规律研究[J].岩石力学与工程学报,2014,33(12):2546-2553.(ZHANG Yuzhi,DU Yanliang,SUN Baochen,et al.Study on the freezing and thawing deformation law of high speed railway subgrade in seasonally frozen soil area[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(12):2546-2553.(in Chinese))
[14]赵安平,王清,车茜,等.季冻区土冻胀量影响因素的灰关联度分析[J].河北工程大学学报(自然科学版),2007,24(4):28-30.(ZHAO Anping,WANG Qing,CHE Qian,et al.Grey relation analysis on frost heaving susceptibility of soil in seasonal frost regions[J].Journal of Hebei University of Engineering(Natural Science Edition),2007,24(4):28-30.(in Chinese))