强风化千枚岩填料的蠕变特性研究
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摘要
为了研究千枚岩填筑路基在长期应力作用下产生的蠕变变形特性,使用杠杆仪进行千枚岩试件的室内单轴压缩试验,得到不同含水率、不同应力条件下应变随时间的变化曲线。对不同含水率下的应变曲线进行分析,可知轴向应变随试件含水率增加而增加,当含水率超过最佳含水率时,应变增加幅度变大;对不同应力条件下的应变曲线分析,随着应力增加,试件蠕变量和蠕变速率显著增大。结果表明:千枚岩填料的蠕变变形是水力耦合作用的结果,在高应力水平和高含水率条件下,千枚岩填料会产生较大的蠕变变形。根据变形曲线建立蠕变的指数衰减模型,发现该模型能较好预测千枚岩填料的蠕变变形。
In order to study the creep deformation characteristics of phyllite filling roadbed under long-term stress,the indoor uniaxial compression tests of phyllite specimens were carried out by using a lever tester and the variation curves of strain with time under different water content and stress conditions were obtained.The strain curve with different water contents were anayzed and it was found that the axial strain increased with the increase of the water content of the specimen,and the strain would increased greatly when the moisture content exceeded the optimum moisture content.By analyzing the strain curves under different stress conditions,it was found that creep variable and rate increased significantly with the increase of the strain.The results showed that the creep deformation of phyllite filler was the result of hydro-mechanical coupling,and it would be larger under the condition of high stress level and high water content.Finally, the exponential decay model of creep was established according to the deformation curve,which could predict creep deformation of phyllite filler better.
In order to study the creep deformation characteristics of phyllite filling roadbed under long-term stress,the indoor uniaxial compression tests of phyllite specimens were carried out by using a lever tester and the variation curves of strain with time under different water content and stress conditions were obtained.The strain curve with different water contents were anayzed and it was found that the axial strain increased with the increase of the water content of the specimen,and the strain would increased greatly when the moisture content exceeded the optimum moisture content.By analyzing the strain curves under different stress conditions,it was found that creep variable and rate increased significantly with the increase of the strain.The results showed that the creep deformation of phyllite filler was the result of hydro-mechanical coupling,and it would be larger under the condition of high stress level and high water content.Finally, the exponential decay model of creep was established according to the deformation curve,which could predict creep deformation of phyllite filler better.
引文
[1] 李忠泉.千枚岩在路基结构中的应用技术研究[D].西安:长安大学,2017.LI Z Q.Research on application technology of qianmian rock in subgrade structure[D].Xian Changan University,2017.
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[3] 卢世杰,蒋应军,杜红军,等.千枚岩用于高速公路路基填料的适用性研究[J].路基工程,2017(4):87-91.LU S J,JIANG Y J,DU H J,et al.Research on the applicability of qianmian rock for highway subgrade filling[J].Subgrade Engineering,2017(4):87-91.
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[8] 郑小忠.千枚岩风化土作为路基填料的室内试验研究[J].中国水运,2011,11(2):206-207.ZHENG X Z.Experimental study on thousands of weathered rocks as subgrade filler[J].China Water transport,2011,11(2):206-207.
[9] 毛雪松,孟庆猛,樊宇朔,等.水分对于风化千枚岩填筑试槽路基回弹模量的影响[J].武汉理工大学学报(交通科学与工程版),2014(4):767-770.MAO X S,MENG Q M,FAN Y S,et al.Effect of moisture on rebound modulus of subgrade filled of weathered phyllite[J].Journal of Wuhan University of Technology(Traffic Science and Engineering Edition),2014(4):767-770.
[10] VAZQUEZ J,GARZON E,ROMEROSA A.South Spain soils containing phyllites improved by usingcement and lime[J].Concrete Engineering International,2005(7):299-304.
[11] GARZóN E,SáNCHEZ-SOTO P J,ROMERO E.Physical and geotechnical properties of clayphyllites[J].Applied Clay Science,2010(48):307-318.
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[13] 但汉成,李亮,胡萍,等.千枚状板岩CBR 特征及影响因素分析[J].长江科学院院报,2009,26(8):41-45.DAN H C,LI L,HU P,et al.Analysis on the characteristics and influencing factors of the CBR of 1000 shale[J].Changjiang Academy of Sciences,2009,26(8):41-45.
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[15] 毛雪松,朱凤杰,黄喆,等.改良千枚岩填料的CBR值影响因素分析[J].重庆交通大学学报(自然科学版),2017,36(2):43-48.MAO X S,ZHU F J,HUANG Z,et al.Analysis of factors influencing the CBR value of improved thousand rock fillers[J].Journal of Chongqing Jiaotong University(Natural Science),2017,36(2):43-48.
[16] 毛雪松,樊宇朔,孟庆猛.高速公路强风化千枚岩填筑路基施工方案研究[J].中外公路,2014,34(6):1-4.MAO X S,FAN Y S,MENG Q M.A study on the construction scheme of highly weathered thousand rock fill subgrade on expressways[J].China and Foreign Highways,2014,34(6):1-4.
[17] 韩伟.风化岩路基填料沉降观测试验研究[J].西安建筑科技大学学报(自然科学版),2011,43(2):178-182.HAN W.Experimental study on the settlement of weathered rock sub grade filler[J].Journal of Xi'an University of Architecture and Technology(Natural Science),2011,43(2):178-182.
[18] 周阳,苏生瑞,李鹏,等.板裂千枚岩微观结构与力学性质[J].吉林大学学报(地球科学版),2019,49(2):504-513.ZHOU Y,SU S R,LI P,et al.Micro-structure and mechanical properties of phyllite[J].Journal of Jilin University(Earth Science Edition),2019,49(2):504-513.
[19] 王翰越,范人杰,蒋应军.振动压实千枚岩路基填料水稳定性研究[J].路基工程,2018(6):74-79.WANG H Y,FAN R J,JIANG Y Y.Study on the stability of filling water of phyllite rock subgrade compacted by vibration[J].Subgrade engineering,2018(6):74-79.
[20] 孙钧.岩土材料流变及其工程应用[M].北京:中国建筑工业出版社,1999.SUN J.Geo technical material technology and its engineering application[M].Beijing:China Architecture & Building Press,1999.
[21] 王闫超.巴东组泥岩蠕变力学特性及边坡变形与支护的时效性研究[D].武汉:中国地质大学,2018.WANG Y C.Creep mechanical characteristics of mudstone,slope deformation and timeliness of support in badong formation[D].Wuhan:China University ofGeosciences,2018.
[2] 方鹏,马顺礼.水泥改良风化千枚岩作为路基填料应用研究[J].公路交通科技(应用技术版),2012(5):67-69.FANG P,MA S L.Application of cement modified weathered thousand rocks as subgrade filler[J].Highway Traffic Science and Technology(Application Technology Edition),2012(5):67-69.
[3] 卢世杰,蒋应军,杜红军,等.千枚岩用于高速公路路基填料的适用性研究[J].路基工程,2017(4):87-91.LU S J,JIANG Y J,DU H J,et al.Research on the applicability of qianmian rock for highway subgrade filling[J].Subgrade Engineering,2017(4):87-91.
[4] 李想.汶马路库岸路基典型横断面结构及其填料性能研究[D].重庆:重庆交通大学,2010.LI X.Typical cross-sectional structure and filling properties of Ku-An subgrade of Wen-Ma road[D].Chong Qing:Chongqing jiaotong university,2010.
[5] 黄承甲.千枚岩填料级配对路基稳定性的影响研究[D].西安:长安大学,2012.HUANG C J.Study on the influence of phyllite rock filler grade matching subgrade stability[D].Xi’an:Chang’an university,2012.
[6] 杨松,曾忠.千枚岩开挖弃料在广甘路堤填方工程中的应用[J].西南公路,2013(1):20-22.YANG S,ZENG Z.Application of phyllite rock excavation waste material in Guang-Gan embankment filling project[J].Southwest highway,2013(1):20-22.
[7] 卢笑.千枚岩弃料作为高速公路路堤填料的可行性研究[D].西安:长安大学,2013.LU X.Feasibility study on phyllite rock as embankment filler for expressway[D].Xi 'an:Chang 'an university,2013.
[8] 郑小忠.千枚岩风化土作为路基填料的室内试验研究[J].中国水运,2011,11(2):206-207.ZHENG X Z.Experimental study on thousands of weathered rocks as subgrade filler[J].China Water transport,2011,11(2):206-207.
[9] 毛雪松,孟庆猛,樊宇朔,等.水分对于风化千枚岩填筑试槽路基回弹模量的影响[J].武汉理工大学学报(交通科学与工程版),2014(4):767-770.MAO X S,MENG Q M,FAN Y S,et al.Effect of moisture on rebound modulus of subgrade filled of weathered phyllite[J].Journal of Wuhan University of Technology(Traffic Science and Engineering Edition),2014(4):767-770.
[10] VAZQUEZ J,GARZON E,ROMEROSA A.South Spain soils containing phyllites improved by usingcement and lime[J].Concrete Engineering International,2005(7):299-304.
[11] GARZóN E,SáNCHEZ-SOTO P J,ROMERO E.Physical and geotechnical properties of clayphyllites[J].Applied Clay Science,2010(48):307-318.
[12] 舒海明.高速铁路软岩改良土试验及施工工艺研究[D].长沙:中南大学,2008.SHU H M.Soil test and construction technology research of soft rock in high-speed railway[D].Changsha:Central South University,2008.
[13] 但汉成,李亮,胡萍,等.千枚状板岩CBR 特征及影响因素分析[J].长江科学院院报,2009,26(8):41-45.DAN H C,LI L,HU P,et al.Analysis on the characteristics and influencing factors of the CBR of 1000 shale[J].Changjiang Academy of Sciences,2009,26(8):41-45.
[14] 熊跃华.路基软质岩块填料室内试验研究[J].路基工程,2009(3):32-33.XIONG Y H.Laboratory test study on soft rock fill in subgrade[J].Subgrade Engineering,2009(3):32-33.
[15] 毛雪松,朱凤杰,黄喆,等.改良千枚岩填料的CBR值影响因素分析[J].重庆交通大学学报(自然科学版),2017,36(2):43-48.MAO X S,ZHU F J,HUANG Z,et al.Analysis of factors influencing the CBR value of improved thousand rock fillers[J].Journal of Chongqing Jiaotong University(Natural Science),2017,36(2):43-48.
[16] 毛雪松,樊宇朔,孟庆猛.高速公路强风化千枚岩填筑路基施工方案研究[J].中外公路,2014,34(6):1-4.MAO X S,FAN Y S,MENG Q M.A study on the construction scheme of highly weathered thousand rock fill subgrade on expressways[J].China and Foreign Highways,2014,34(6):1-4.
[17] 韩伟.风化岩路基填料沉降观测试验研究[J].西安建筑科技大学学报(自然科学版),2011,43(2):178-182.HAN W.Experimental study on the settlement of weathered rock sub grade filler[J].Journal of Xi'an University of Architecture and Technology(Natural Science),2011,43(2):178-182.
[18] 周阳,苏生瑞,李鹏,等.板裂千枚岩微观结构与力学性质[J].吉林大学学报(地球科学版),2019,49(2):504-513.ZHOU Y,SU S R,LI P,et al.Micro-structure and mechanical properties of phyllite[J].Journal of Jilin University(Earth Science Edition),2019,49(2):504-513.
[19] 王翰越,范人杰,蒋应军.振动压实千枚岩路基填料水稳定性研究[J].路基工程,2018(6):74-79.WANG H Y,FAN R J,JIANG Y Y.Study on the stability of filling water of phyllite rock subgrade compacted by vibration[J].Subgrade engineering,2018(6):74-79.
[20] 孙钧.岩土材料流变及其工程应用[M].北京:中国建筑工业出版社,1999.SUN J.Geo technical material technology and its engineering application[M].Beijing:China Architecture & Building Press,1999.
[21] 王闫超.巴东组泥岩蠕变力学特性及边坡变形与支护的时效性研究[D].武汉:中国地质大学,2018.WANG Y C.Creep mechanical characteristics of mudstone,slope deformation and timeliness of support in badong formation[D].Wuhan:China University ofGeosciences,2018.