干湿循环对地裂缝带黄土抗剪强度影响研究
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摘要
为研究长期干湿循环作用对地裂缝带及其附近黄土强度的影响,以西安地裂缝场地典型黄土试样为研究对象,通过室内试验方法(主要为直接剪切实验),研究地裂缝带黄土试样在干湿循环作用下不同含水率的抗剪强度参数及其强度衰减特性,提出了地裂缝带黄土衰减强度的求取方法,研究表明:(1)干湿循环作用下,地裂缝带黄土抗剪强度随着干湿循环次数及含水率的增加而逐渐减小,1次干湿循环或大于18%含水率对抗剪强度参数影响明显;(2)1次干湿循环作用其强度衰减最为明显,随着干湿循环次数的增加而增加且增幅逐渐下降;(3)1次干湿循环作用下其强度随含水率衰减最为明显,随着含水率的增加其逐渐减小,且在12%以下含水率时其强度衰减较高,大于12%含水率时强度衰减较小。
This paper studies the effect of long-term dry and wet circulation on the strength of ground fissure zone and its nearby loess.It takes the typical loess samples of ground fracture site in Xi'an as the research object.It studies the shear strength parameters and the strength attenuation characteristics of the loess specimens with different moisture content under dry and wet circulation with laboratory test method(mainly for direct shear test).It puts forward a ground fissured loess strength attenuation calculation method.Research results show the follows.(1)Shear strength of ground fissured loess is decreased gradually with the cycle number and water content.One dry-wet cycle or greater than 18% moisture content have affected on the shear strength parameters significantly.(2) The intensity attenuation of the 1 drying and wetting cycles is most obvious.It increases with the increase of dry and wet cycles.(3) Under the action of 1 dry and wet cycle,the attenuation of its strength is most obvious with the moisture content.It gradually decreases with the increase of water content.Its strength attenuates higher when the water content is below 12%,and the strength attenuation is smaller when the water content is greater than 12%.
This paper studies the effect of long-term dry and wet circulation on the strength of ground fissure zone and its nearby loess.It takes the typical loess samples of ground fracture site in Xi'an as the research object.It studies the shear strength parameters and the strength attenuation characteristics of the loess specimens with different moisture content under dry and wet circulation with laboratory test method(mainly for direct shear test).It puts forward a ground fissured loess strength attenuation calculation method.Research results show the follows.(1)Shear strength of ground fissured loess is decreased gradually with the cycle number and water content.One dry-wet cycle or greater than 18% moisture content have affected on the shear strength parameters significantly.(2) The intensity attenuation of the 1 drying and wetting cycles is most obvious.It increases with the increase of dry and wet cycles.(3) Under the action of 1 dry and wet cycle,the attenuation of its strength is most obvious with the moisture content.It gradually decreases with the increase of water content.Its strength attenuates higher when the water content is below 12%,and the strength attenuation is smaller when the water content is greater than 12%.
引文
Cheng J M,Wang Y M,Miao S C,et al.2014.Property study of solidified loess under wet-dry cycles[J].Journal of Engineering Geology,22(2):226-232.
Deng Y H,Li L,Mu H D,et al.2015.Experimental research on rheological properties of Q3intact loess within ground fissures belt in Xi'an region[J].Rock and Soil Mechanics,36(7):1847-1855.
Duan T.2009.The research of alternating wet and dry on the deterioration of loess strength[D].Yangling:Northwest Agriculture and Forestry University.
Fletcher J E,Peterson H B,Chandler V N.1954.Piping[J].TransactionAmerican Geophysical Union,35:258-262.
Holzer T L,Davis S N,Lofgren B E.1979.Faulting caused by ground water exrtraction in south central Arizona[J].Journal of Geological Research:Solid Earth(1978-2012),84(82):603-612.
Holzer T L.1980.Faulting caused by groundwater level declines,San,Joaquin Valley,California[J].Water Resources Reserch,16(6):1065-1070.
Huang Q B,Peng J B,Yan J K,et al.2009.Model test study of influence of ground fissure movement on stress and deformation of soil mass[J].Rock and Soil Mechanics,30(4):903-908.
Leonard R J.1929.An earth fissure in southern Arizona[J].Journal of Geology,37(8):765-774.
Li L,Deng Y H,Wang P,et al.2018.Study on the relationship between the shear strength and the Long-term rheological strength of the Q3Loess in the fissure zone[J].Chinese Journal of Underground Space and Engineering,14(1):241-249.
Li L,Zhang K,Zhang Q L,et al.2017.Experimental study on the loess strength degradation characteristics under the action of dry-wet and freeze-thaw cycles[J].Journal of Glaciology and Geocryology,38(4):1142-1149.
Li L.2013.Study on three-dimensional rheological constitutive and longterm strength of Q3undisturbed-loess in ground fissure zone[D].Chang'an:Chang'an University.
Li X S.1994.Some new views on the genetic mechanism of Xi'an ground fractures[J].Journal of Xi'an College of Geology,16(2):75-80.
Li Y S.1986.Ground fissures in Xi'an Region[M].Xi'an:Earthquake Press.
Liu G C.1986.The ground fissures in Xi'an Shaanxi[J].Journal of Chang'an University Earth Science Edition,8(4):9-22.
Liu H T,Zhang A J,Duan T,et al.2010.The influence of alternate drywet on the strength and permeability of remolded loess[J].HydroScience and Engineering,(4):38-42.
Peng J B,et al.2012.Hazard of ground fissure in Xi'an[M].Beijing:Science Press.
Peng J B,Fan W,Li X A,et al.2007.Some key questions in the formation of ground fissures in the Fen-Wei Basin[J].Journal of Engineering Geology,15(4):433-440.
Song Y H,Li Z S.2012.Influence of earth fissure actvity to physical and mechanical properties of soils[J].Journal of Civil,Architectural&Environmental Engineering,34(S1):200-204.
Wang J M,et al.2000.The theory and application of earth fissure and hazard[M].Xi'an:Shanxi Science and Technology Press.
Wang J M.1989.Ground fissure in the city of Xi'an[J].Seismology and Geology,11(3):85-93.
Wang L.2010.Statistical analysis on physical and mechanical properties of geotechnical on band of Xi'an ground fissures[D].Xi'an:Chang'an University.
Wang W P.2008.Research on physical and mechanical properties of strata on both sides of Xi'an ground fractures[D].Xi'an:Chang'an University.
Wang X L.2017.Research on the effect of shear strength and structure property and slope stability of loess under dry-wet cycle[D].Xi'an:Xi'an University of Technology.
Wang Z G.2009.Research on physical and mechanical properties of geotechnical on band of Xi'an ground fractures[D].Xi'an:Chang'an University.
Ye W J,Li C Q,Ma W C.2016.Mechanism fractured loess expansion joints under the effect of wet-dry cycle[J].Science Technology and Engineering,16(30):122-127.
Yi X F.1984.A discussion on the ground subsidence and the genesis of ground fissure in Xi'an City[J].Earthquake,12(6):50-54.
Yuan Z H,Ni W K,Tang C,et al.2017.Experimental study of structure strength and strength attenuation of loess under wetting-drying cycle[J].Rock and Soil Mechanics,38(7):1894-1902,1942.
Yuan Z H.2015.Research on change mechanism of strength and microstructure of loess under wetting-drying cycle[D].Xi'an:Chang'an University.
Zhang J M.1990.Research on ground fissures in Xi'an city[M].Xi'an:Northwest University Press.
程佳明,王银梅,苗世超,等.2014.固化黄土的干湿循环特性研究[J].工程地质学报,22(2):226-232.
邓亚虹,李丽,慕焕东,等.2015.西安地区地裂缝带Q3原状黄土流变特性试验研究[J].岩土力学,36(7):1847-1855.
段涛.2009.干湿循环情况下黄土强度劣化特性研究[D].杨凌:西北农林科技大学.
黄强兵,彭建兵,闫金凯,等.2009.地裂缝活动对土体应力与变形影响的试验研究[J].岩土力学,30(4):903-908.
李丽,张坤,张青龙,等.2016.干湿和冻融循环作用下黄土强度劣化特性试验研究[J].冰川冻土,38(4):1142-1149.
李丽,邓亚虹,王鹏,等.2018.地裂缝带Q3黄土强度与流变长期强度关系研究[J].地下空间与工程学报,14(1):241-249.
李丽.2013.地裂缝带Q3原状黄土三维流变本构及长期强度研究[D].长安:长安大学.
李新生.1994.对西安地裂缝形成机制的几点新看法[J].西安地质学院学报,16(2):75-80.
李永善.1986.西安地裂缝[M].北京:地震出版社.
刘国昌.1986.西安的地裂缝[J].长安大学学报(地球科学版),8(4):9-22.
刘宏泰,张爱军,段涛,等.2010.干湿循环对重塑黄土强度和渗透性的影响[J].水利水运工程学报,(4):38-42.
彭建兵,等.2012.西安地裂缝灾害[M].北京:科学出版社.
彭建兵,范文,李喜安,等.2007.汾渭盆地地裂缝成因研究中的若干关键问题[J].工程地质学报,15(4):433-440.
宋彦辉,李忠生.2012.地裂缝活动对两侧土体性质的影响[J].土木建筑与环境工程,34(S1):200-204.
王景明,等.2000.地裂缝及其灾害的理论与应用[M].西安:陕西科学技术出版社.
王景明.1989.论西安地裂缝[J].地震地质,11(3):85-93.
王璐.2010.西安地裂缝带岩土物理力学性质统计分析[D].西安:长安大学.
王万平.2008.西安地裂缝两盘地层岩土物理力学性质研究[D].西安:长安大学.
王晓亮.2017.干湿循环对黄土抗剪强度和结构性及边坡稳定性影响的研究[D].西安:西安理工大学.
王志刚.2009.西安地裂缝带岩土物理力学性质研究[D].西安:长安大学.
叶万军,李长清,马伟超.2016.干湿循环作用下黄土节理裂隙发育扩张的机制研究[J].科学技术与工程,16(30):122-127.
易学发.1984.西安市地面沉降及地裂缝成因的讨论[J].地震,12(6):50-54.
袁志辉,倪万魁,唐春,等.2017.干湿循环下黄土强度衰减与结构强度试验研究[J].岩土力学,38(7):1894-1902,1942.
袁志辉.2015.干湿循环下黄土的强度及微结构变化机理研究[D].西安:长安大学.
张家明.1990.西安地裂缝研究[M].西安:西北大学出版社.
Deng Y H,Li L,Mu H D,et al.2015.Experimental research on rheological properties of Q3intact loess within ground fissures belt in Xi'an region[J].Rock and Soil Mechanics,36(7):1847-1855.
Duan T.2009.The research of alternating wet and dry on the deterioration of loess strength[D].Yangling:Northwest Agriculture and Forestry University.
Fletcher J E,Peterson H B,Chandler V N.1954.Piping[J].TransactionAmerican Geophysical Union,35:258-262.
Holzer T L,Davis S N,Lofgren B E.1979.Faulting caused by ground water exrtraction in south central Arizona[J].Journal of Geological Research:Solid Earth(1978-2012),84(82):603-612.
Holzer T L.1980.Faulting caused by groundwater level declines,San,Joaquin Valley,California[J].Water Resources Reserch,16(6):1065-1070.
Huang Q B,Peng J B,Yan J K,et al.2009.Model test study of influence of ground fissure movement on stress and deformation of soil mass[J].Rock and Soil Mechanics,30(4):903-908.
Leonard R J.1929.An earth fissure in southern Arizona[J].Journal of Geology,37(8):765-774.
Li L,Deng Y H,Wang P,et al.2018.Study on the relationship between the shear strength and the Long-term rheological strength of the Q3Loess in the fissure zone[J].Chinese Journal of Underground Space and Engineering,14(1):241-249.
Li L,Zhang K,Zhang Q L,et al.2017.Experimental study on the loess strength degradation characteristics under the action of dry-wet and freeze-thaw cycles[J].Journal of Glaciology and Geocryology,38(4):1142-1149.
Li L.2013.Study on three-dimensional rheological constitutive and longterm strength of Q3undisturbed-loess in ground fissure zone[D].Chang'an:Chang'an University.
Li X S.1994.Some new views on the genetic mechanism of Xi'an ground fractures[J].Journal of Xi'an College of Geology,16(2):75-80.
Li Y S.1986.Ground fissures in Xi'an Region[M].Xi'an:Earthquake Press.
Liu G C.1986.The ground fissures in Xi'an Shaanxi[J].Journal of Chang'an University Earth Science Edition,8(4):9-22.
Liu H T,Zhang A J,Duan T,et al.2010.The influence of alternate drywet on the strength and permeability of remolded loess[J].HydroScience and Engineering,(4):38-42.
Peng J B,et al.2012.Hazard of ground fissure in Xi'an[M].Beijing:Science Press.
Peng J B,Fan W,Li X A,et al.2007.Some key questions in the formation of ground fissures in the Fen-Wei Basin[J].Journal of Engineering Geology,15(4):433-440.
Song Y H,Li Z S.2012.Influence of earth fissure actvity to physical and mechanical properties of soils[J].Journal of Civil,Architectural&Environmental Engineering,34(S1):200-204.
Wang J M,et al.2000.The theory and application of earth fissure and hazard[M].Xi'an:Shanxi Science and Technology Press.
Wang J M.1989.Ground fissure in the city of Xi'an[J].Seismology and Geology,11(3):85-93.
Wang L.2010.Statistical analysis on physical and mechanical properties of geotechnical on band of Xi'an ground fissures[D].Xi'an:Chang'an University.
Wang W P.2008.Research on physical and mechanical properties of strata on both sides of Xi'an ground fractures[D].Xi'an:Chang'an University.
Wang X L.2017.Research on the effect of shear strength and structure property and slope stability of loess under dry-wet cycle[D].Xi'an:Xi'an University of Technology.
Wang Z G.2009.Research on physical and mechanical properties of geotechnical on band of Xi'an ground fractures[D].Xi'an:Chang'an University.
Ye W J,Li C Q,Ma W C.2016.Mechanism fractured loess expansion joints under the effect of wet-dry cycle[J].Science Technology and Engineering,16(30):122-127.
Yi X F.1984.A discussion on the ground subsidence and the genesis of ground fissure in Xi'an City[J].Earthquake,12(6):50-54.
Yuan Z H,Ni W K,Tang C,et al.2017.Experimental study of structure strength and strength attenuation of loess under wetting-drying cycle[J].Rock and Soil Mechanics,38(7):1894-1902,1942.
Yuan Z H.2015.Research on change mechanism of strength and microstructure of loess under wetting-drying cycle[D].Xi'an:Chang'an University.
Zhang J M.1990.Research on ground fissures in Xi'an city[M].Xi'an:Northwest University Press.
程佳明,王银梅,苗世超,等.2014.固化黄土的干湿循环特性研究[J].工程地质学报,22(2):226-232.
邓亚虹,李丽,慕焕东,等.2015.西安地区地裂缝带Q3原状黄土流变特性试验研究[J].岩土力学,36(7):1847-1855.
段涛.2009.干湿循环情况下黄土强度劣化特性研究[D].杨凌:西北农林科技大学.
黄强兵,彭建兵,闫金凯,等.2009.地裂缝活动对土体应力与变形影响的试验研究[J].岩土力学,30(4):903-908.
李丽,张坤,张青龙,等.2016.干湿和冻融循环作用下黄土强度劣化特性试验研究[J].冰川冻土,38(4):1142-1149.
李丽,邓亚虹,王鹏,等.2018.地裂缝带Q3黄土强度与流变长期强度关系研究[J].地下空间与工程学报,14(1):241-249.
李丽.2013.地裂缝带Q3原状黄土三维流变本构及长期强度研究[D].长安:长安大学.
李新生.1994.对西安地裂缝形成机制的几点新看法[J].西安地质学院学报,16(2):75-80.
李永善.1986.西安地裂缝[M].北京:地震出版社.
刘国昌.1986.西安的地裂缝[J].长安大学学报(地球科学版),8(4):9-22.
刘宏泰,张爱军,段涛,等.2010.干湿循环对重塑黄土强度和渗透性的影响[J].水利水运工程学报,(4):38-42.
彭建兵,等.2012.西安地裂缝灾害[M].北京:科学出版社.
彭建兵,范文,李喜安,等.2007.汾渭盆地地裂缝成因研究中的若干关键问题[J].工程地质学报,15(4):433-440.
宋彦辉,李忠生.2012.地裂缝活动对两侧土体性质的影响[J].土木建筑与环境工程,34(S1):200-204.
王景明,等.2000.地裂缝及其灾害的理论与应用[M].西安:陕西科学技术出版社.
王景明.1989.论西安地裂缝[J].地震地质,11(3):85-93.
王璐.2010.西安地裂缝带岩土物理力学性质统计分析[D].西安:长安大学.
王万平.2008.西安地裂缝两盘地层岩土物理力学性质研究[D].西安:长安大学.
王晓亮.2017.干湿循环对黄土抗剪强度和结构性及边坡稳定性影响的研究[D].西安:西安理工大学.
王志刚.2009.西安地裂缝带岩土物理力学性质研究[D].西安:长安大学.
叶万军,李长清,马伟超.2016.干湿循环作用下黄土节理裂隙发育扩张的机制研究[J].科学技术与工程,16(30):122-127.
易学发.1984.西安市地面沉降及地裂缝成因的讨论[J].地震,12(6):50-54.
袁志辉,倪万魁,唐春,等.2017.干湿循环下黄土强度衰减与结构强度试验研究[J].岩土力学,38(7):1894-1902,1942.
袁志辉.2015.干湿循环下黄土的强度及微结构变化机理研究[D].西安:长安大学.
张家明.1990.西安地裂缝研究[M].西安:西北大学出版社.