考虑荷载与浸水条件的预崩解炭质泥岩变形试验
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摘要
为研究荷载与浸水条件下预崩解炭质泥岩变形特性,研发一套可综合考虑压实度、含水率、竖向荷载、浸水时间及循环次数等因素的湿化变形试验装置,并设计相应试验方案,开展荷载与浸水条件下预崩解炭质泥岩变形特性试验。研究结果表明:在加载初期和首次浸水时,预崩解炭质泥岩产生较大竖向变形,分别为压缩变形和湿化变形,湿化变形量比压缩变形量大25.7%;各因素对预崩解炭质泥岩竖向变形影响的主次顺序(从主至次)依次为竖向荷载→循环次数→浸水时间→压实度→含水率,且竖向变形与荷载呈正相关关系,对试样进行浸水循环会大大增加湿化变形;得到预崩解炭质泥岩最大竖向变形与各因素的函数关系式,可为建立炭质泥岩湿化变形计算理论及工程实践提供参考依据。
To study the deformation characteristics of pre-disintegrating carbonaceous mudstone under loading and foundering condition, a new type of wetting deformation test device was developed. Considering the factors such as compactness, moisture content, vertical load, foundering time and cycle number synthetically, a series of deformation tests of pre-disintegrating carbon mudstone were carried out on the basis of orthogonal experiment. The results show that the pre-disintegrating carbon mudstone can produce a large vertical deformation at the time of initial adding water and loading, and they are compressive deformation and wetting deformation, respectively. The wetting deformation is 25.7% higher than compressive deformation. The main order of influence of various factors on the maximum vertical deformation of pre-disintegrating carbon mudstone from large to small is pressure load, cycle number, foundering time,compactness and moisture content. The vertical deformation of pre-disintegrating carbon mudstone is positively related to vertical load. Wet-dry cycle greatly increases the wetting deformation of samples. The function relationship between various factors and the maximum vertical deformation of pre-disintegrated carbonaceous mudstone is obtained. It can provide references for the relevant theoretical research and engineering practice.
To study the deformation characteristics of pre-disintegrating carbonaceous mudstone under loading and foundering condition, a new type of wetting deformation test device was developed. Considering the factors such as compactness, moisture content, vertical load, foundering time and cycle number synthetically, a series of deformation tests of pre-disintegrating carbon mudstone were carried out on the basis of orthogonal experiment. The results show that the pre-disintegrating carbon mudstone can produce a large vertical deformation at the time of initial adding water and loading, and they are compressive deformation and wetting deformation, respectively. The wetting deformation is 25.7% higher than compressive deformation. The main order of influence of various factors on the maximum vertical deformation of pre-disintegrating carbon mudstone from large to small is pressure load, cycle number, foundering time,compactness and moisture content. The vertical deformation of pre-disintegrating carbon mudstone is positively related to vertical load. Wet-dry cycle greatly increases the wetting deformation of samples. The function relationship between various factors and the maximum vertical deformation of pre-disintegrated carbonaceous mudstone is obtained. It can provide references for the relevant theoretical research and engineering practice.
引文
[1]许中杰,程日辉,李飞,等.粤西高明地区晚三叠世小坪组元素地球化学特征[J].吉林大学学报(地球科学版),2010,40(2):305-313.XU Zhongjie,CHENG Rihui,LI Fei,et al.Elemental geochemical characteristics of the xiaoping formation in late triassic epoch in Gaoming area of the western Guangdong Province[J].Journal of Jilin University(Earth Science Edition),2010,40(2):305-313.
[2]曾铃,付宏渊,贺炜,等.三轴CT条件下预崩解炭质泥岩路堤填料的细观试验[J].中南大学学报(自然科学版),2014,45(3):925-931.ZENG Ling,FU Hongyuan,HE Wei,et al.Micro mechanical analysis of pre-disintegrating carbonaceous mudstone for embankment filling material based on triaxial CT test[J].Journal of Central South University(Science and Technology),2014,45(3):925-931.
[3]付宏渊,史振宁,邱祥,等.炭质泥岩-土分层路堤在浸水条件下的渗流及变形特征试验[J].中国公路学报,2017,30(11):1-8,98.FU Hongyuan,SHI Zhenning,QIU Xiang,et al.Seepage and deformation test of carbonaceous mudstone-soil layered embankment under water immersion[J].China Journal of Highway Transportation,2017,30(11):1-8,98.
[4]邹德高,杨小龙,刘京茂,等.西域砾岩砂砾料沥青混凝土心墙坝湿化变形数值分析[J].大连理工大学学报,2015,55(6):605-611.ZOU Degao,YANG Xiaolong,LIU Jingmao,et al.Numerical analysis of wetting-induced deformation of Xiyu conglomerate gravel dam with asphalt concrete cpre[J].Journal of Dalian University of Technology,2015,55(6):605-611.
[5]SHI Chuanqi,AN Yi,WU Qiang,et al.Numerical simulation of landslide-generated waves using a soil-water coupling smoothed particle hydrodynamics model[J].Advances in Water Resources,2016,92:130-141.
[6]毛雪松,郑小忠,马骉,等.风化千枚岩填筑路基湿化变形现场试验分析[J].岩土力学,2011,32(8):2300-2306.MAO Xuesong,ZHENG Xiaozhong,MA Biao,et al.Field experimental analysis of wetting deformation of filled subgrade with weathered phyllite[J].Rock and Soil Mechanics,2011,32(8):2300-2306.
[7]LEUNG A K,NG C W W.Field investigation of deformation characteristics and stress mobilisation of a soil slope[J].Landslides,2016,13(2):229-240.
[8]LIU X R,QI D H,YU Y,et al.Analysis on wetting deformation properties of silty clay[J].Journal of Engineering Science&Technology Review,2014,7(3):39-44.
[9]WANG L L,BORNERT M,HéRIPRéE,et al.Irreversible deformation and damage in argillaceous rocks induced by wetting/drying[J].Journal of Applied Geophysics,2014,107(5):108-118.
[10]刘文化,杨庆,唐小微,等.干湿循环条件下不同初始干密度土体的力学特性[J].水利学报,2014,45(3):261-268.LIU Wenhua,YANG Qing,TANG Xiaowei,et al.Mechanical behaviors of soils with different initial dry densities under drying-wetting cycle[J].Journal of Hydraulic Engineering,2014,45(3):261-268.
[11]WAN Yong,XUE Qiang,LIU Lei,et al.The role of roots in the stability of landfill clay covers under the effect of dry-wet cycles[J].Environmental Earth Sciences,2016,75(71):1-9.
[12]ZHANG B Y,ZHANG J H,SUN G L.Deformation and shear strength of rockfill materials composed of soft siltstones subjected to stress,cyclical drying/wetting and temperature variations[J].Engineering Geology,2015,190:87-97.
[13]王江营,曹文贵,张超,等.基于正交设计的复杂环境下土石混填体大型直剪试验研究[J].岩土工程学报,2013,35(10):1849-1856.WANG Jiangying,CAO Wengui,ZHANG Chao,et al.Large-scale direct shear tests on soil-rock aggregate mixture under complicated environment based on orthogonal design[J].Chinese Journal of Geotechnical Engineering,2013,35(10):1849-1856.
[14]谈云志,孔令伟,郭爱国,等.压实红黏土的湿化变形试验研究[J].岩土工程学报,2011,33(3):483-489.TAN Yunzhi,KONG Lingwei,GUO Aiguo,et al.Experimental study on wetting deformation of compacted laterite[J].Chinese Journal of Geotechnical Engineering,2011,33(3):483-489.
[15]BANDARA S,SOGA K.Coupling of soil deformation and pore fluid flow using material point method[J].Computers&Geotechnics,2015,63(1):199-214.
[16]JIANG Mingjing,HU Haijun,LIU Fang.Summary of collapsible behaviour of artificially structured loess in oedometer and triaxial wetting tests[J].Canadian Geotechnical Journal,2012,49(10):1147-1157.
[17]KAYABALI K,DEMIR S.Measurement of swelling pressure:direct method versus indirect methods[J].Canadian Geotechnical Journal,2011,48(3):354-364.
[18]SHALABY S S.The assessment of the collapse potential of fills during inundation using plate load tests[J].Life Science Journal,2014,11(8):1001-1006.
[19]欧孝夺,唐迎春,钟子文,等.重塑膨胀岩土微变形条件下膨胀力试验研究[J].岩石力学与工程学报,2013,32(5):1067-1072.OU Xiaoduo,TANG Yingchun,ZHONG Ziwen,et al.Test research on expansive force under small deformation of remolded expansive rock and soil[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(5):1067-1072.
[2]曾铃,付宏渊,贺炜,等.三轴CT条件下预崩解炭质泥岩路堤填料的细观试验[J].中南大学学报(自然科学版),2014,45(3):925-931.ZENG Ling,FU Hongyuan,HE Wei,et al.Micro mechanical analysis of pre-disintegrating carbonaceous mudstone for embankment filling material based on triaxial CT test[J].Journal of Central South University(Science and Technology),2014,45(3):925-931.
[3]付宏渊,史振宁,邱祥,等.炭质泥岩-土分层路堤在浸水条件下的渗流及变形特征试验[J].中国公路学报,2017,30(11):1-8,98.FU Hongyuan,SHI Zhenning,QIU Xiang,et al.Seepage and deformation test of carbonaceous mudstone-soil layered embankment under water immersion[J].China Journal of Highway Transportation,2017,30(11):1-8,98.
[4]邹德高,杨小龙,刘京茂,等.西域砾岩砂砾料沥青混凝土心墙坝湿化变形数值分析[J].大连理工大学学报,2015,55(6):605-611.ZOU Degao,YANG Xiaolong,LIU Jingmao,et al.Numerical analysis of wetting-induced deformation of Xiyu conglomerate gravel dam with asphalt concrete cpre[J].Journal of Dalian University of Technology,2015,55(6):605-611.
[5]SHI Chuanqi,AN Yi,WU Qiang,et al.Numerical simulation of landslide-generated waves using a soil-water coupling smoothed particle hydrodynamics model[J].Advances in Water Resources,2016,92:130-141.
[6]毛雪松,郑小忠,马骉,等.风化千枚岩填筑路基湿化变形现场试验分析[J].岩土力学,2011,32(8):2300-2306.MAO Xuesong,ZHENG Xiaozhong,MA Biao,et al.Field experimental analysis of wetting deformation of filled subgrade with weathered phyllite[J].Rock and Soil Mechanics,2011,32(8):2300-2306.
[7]LEUNG A K,NG C W W.Field investigation of deformation characteristics and stress mobilisation of a soil slope[J].Landslides,2016,13(2):229-240.
[8]LIU X R,QI D H,YU Y,et al.Analysis on wetting deformation properties of silty clay[J].Journal of Engineering Science&Technology Review,2014,7(3):39-44.
[9]WANG L L,BORNERT M,HéRIPRéE,et al.Irreversible deformation and damage in argillaceous rocks induced by wetting/drying[J].Journal of Applied Geophysics,2014,107(5):108-118.
[10]刘文化,杨庆,唐小微,等.干湿循环条件下不同初始干密度土体的力学特性[J].水利学报,2014,45(3):261-268.LIU Wenhua,YANG Qing,TANG Xiaowei,et al.Mechanical behaviors of soils with different initial dry densities under drying-wetting cycle[J].Journal of Hydraulic Engineering,2014,45(3):261-268.
[11]WAN Yong,XUE Qiang,LIU Lei,et al.The role of roots in the stability of landfill clay covers under the effect of dry-wet cycles[J].Environmental Earth Sciences,2016,75(71):1-9.
[12]ZHANG B Y,ZHANG J H,SUN G L.Deformation and shear strength of rockfill materials composed of soft siltstones subjected to stress,cyclical drying/wetting and temperature variations[J].Engineering Geology,2015,190:87-97.
[13]王江营,曹文贵,张超,等.基于正交设计的复杂环境下土石混填体大型直剪试验研究[J].岩土工程学报,2013,35(10):1849-1856.WANG Jiangying,CAO Wengui,ZHANG Chao,et al.Large-scale direct shear tests on soil-rock aggregate mixture under complicated environment based on orthogonal design[J].Chinese Journal of Geotechnical Engineering,2013,35(10):1849-1856.
[14]谈云志,孔令伟,郭爱国,等.压实红黏土的湿化变形试验研究[J].岩土工程学报,2011,33(3):483-489.TAN Yunzhi,KONG Lingwei,GUO Aiguo,et al.Experimental study on wetting deformation of compacted laterite[J].Chinese Journal of Geotechnical Engineering,2011,33(3):483-489.
[15]BANDARA S,SOGA K.Coupling of soil deformation and pore fluid flow using material point method[J].Computers&Geotechnics,2015,63(1):199-214.
[16]JIANG Mingjing,HU Haijun,LIU Fang.Summary of collapsible behaviour of artificially structured loess in oedometer and triaxial wetting tests[J].Canadian Geotechnical Journal,2012,49(10):1147-1157.
[17]KAYABALI K,DEMIR S.Measurement of swelling pressure:direct method versus indirect methods[J].Canadian Geotechnical Journal,2011,48(3):354-364.
[18]SHALABY S S.The assessment of the collapse potential of fills during inundation using plate load tests[J].Life Science Journal,2014,11(8):1001-1006.
[19]欧孝夺,唐迎春,钟子文,等.重塑膨胀岩土微变形条件下膨胀力试验研究[J].岩石力学与工程学报,2013,32(5):1067-1072.OU Xiaoduo,TANG Yingchun,ZHONG Ziwen,et al.Test research on expansive force under small deformation of remolded expansive rock and soil[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(5):1067-1072.