黄土场地剪切波速影响因素模糊灰关联分析研究
|
摘要
利用单孔法和瞬态瑞利波法分别测试甘肃临夏某黄土场地的剪切波速,结合土体物性参数测试结果,分析黄土剪切波速与测试方法、初始孔隙比、饱和度、天然密度和深度等影响因素之间的发展变化规律,并应用模糊灰关联理论分析上述影响因素对高饱和度黄土剪切波速影响的贡献率。研究表明:单孔法测试的剪切波速小于瞬态瑞利波法测试的剪切波速;随着初始孔隙比增加,剪切波速呈减小趋势,剪切波速增长率则呈增加趋势;随着饱和度、天然密度、深度的增加,剪切波速增长变缓,剪切波速增长率表现为减小趋势。灰色关联分析表明:对剪切波速影响最大的是饱和度,其次为土的深度,天然密度和孔隙比对剪切波速的影响基本相当。
The shear wave velocity of loess,in some loess site near Linxia city of Gansu province,was tested through the single-hole method and transient Rayleigh wave method respectively. Together with the laboratorial results of basic properties of loess,the development laws between shear wave velocity and test method,initial void ratio,saturation,natural density and depth were analyzed for high-saturated loess. Based on the fuzzy-gray relation theory,the contribution rates of each influencing factors to the shear wave velocity of loess were studied. It is shown that the value of shear wave velocity is tested less by the single-hole method than the transient Rayleigh wave method;that the value of shear wave velocity is decreasing with the increase of initial void ratio and saturation,but the increasing rate of shear wave velocity become larger. Along with the increase of natural density and depth,the increasing trend of value of shear wave velocity become gentle,but the increasing rate of shear wave velocity has a decreasing trend. It is concluded by relation analysis that the soil saturation has the greatest impact on the shear wave velocity,while depth is the second important factor;and that the influences of soil natural density and void ratio to shear wave velocity are equivalent.
The shear wave velocity of loess,in some loess site near Linxia city of Gansu province,was tested through the single-hole method and transient Rayleigh wave method respectively. Together with the laboratorial results of basic properties of loess,the development laws between shear wave velocity and test method,initial void ratio,saturation,natural density and depth were analyzed for high-saturated loess. Based on the fuzzy-gray relation theory,the contribution rates of each influencing factors to the shear wave velocity of loess were studied. It is shown that the value of shear wave velocity is tested less by the single-hole method than the transient Rayleigh wave method;that the value of shear wave velocity is decreasing with the increase of initial void ratio and saturation,but the increasing rate of shear wave velocity become larger. Along with the increase of natural density and depth,the increasing trend of value of shear wave velocity become gentle,but the increasing rate of shear wave velocity has a decreasing trend. It is concluded by relation analysis that the soil saturation has the greatest impact on the shear wave velocity,while depth is the second important factor;and that the influences of soil natural density and void ratio to shear wave velocity are equivalent.
引文
[1]王兰民,石玉成,刘旭,等.黄土动力学[M].北京:地震出版社,2003:183–208.(WANG Lanmin,SHI Yucheng,LIU Xu,et al.Loess dynamics[M].Beijing:China Seismological Press,2003:183–208.(in Chinese))
[2]王峻,王兰民,王平,等.不同地区饱和黄土液化特性研究[J].水文地质工程地质,2011,38(5):54–57.(WANG Jun,WANG Lanmin,WANG Ping,et al.A study of liquefaction characteristics of saturated loess in different regions[J].Hydrogeology and Engineering Geology,2011,38(5):54–57.(in Chinese))
[3]李保雄,苗天德.黄土抗剪强度的水敏感性特征研究[J].岩石力学与工程学报,2006,25(5):1 003–1 008.(LI Baoxiong,MIAO Tiande.Reserch on water sensitivity of loess shear strength[J].Rock Mechanics and Engineering,2006,25(5):1 003–1 008.(in Chinese))
[4]WANG P,WANG L M,WANG Q,et al.Study on critical shear wave velocity of saturated loess foundation soil liquefaction under different seismic magnitudes action[J].Advanced Materials Research,2012,594/597:1 720–1 726.
[5]SEED R B,CETIN K O,MOSS R E S,et al.Recent advances in soil liquefaction engineering:a unified and consistent framework[C]//Proceedings of the 26th Annual ASCE Los Angeles Geotechnical Spring Seminar.[S.l.]:[s.n.],2003:42–62.
[6]王谦.饱和黄土液化势的物性指标评价和深度下限研究[硕士学位论文][D].兰州:中国地震局兰州地震研究所,2011.(WANG Qian.Physical indicators evaluation of liquefaction potential and depth lower limit research of saturated Loess[M.S.Thesis][D].Lanzhou:Lanzhou Institute of Seismology,CEA,2011.(in Chinese))
[7]侯云亮.西安地区黄土地基剪切波速与工程特性相关性的研究[硕士学位论文][D].西安:长安大学,2007.(HOU Yunliang.Research on correlation between shear wave velocity and engineering properties of soil in Xi'an area loess ground[M.S.Thesis][D].Xi'an:Changan University,2007.(in Chinese))
[8]赵艳林,梅占馨.模糊灰关联模式识别方法及其应用[J].系统工程理论与实践,1996,(6):67–70.(ZHAO Yanlin,MEI Zhanxin.Pattern recognition method based on fuzzy grey incidence and its application[J].System Engineering Theory and Practice,1996,(6):67–70.(in Chinese))
[9]周刚,程卫民.改进的模糊灰色关联分析法在热舒适度影响因素评定中的应用[J].安全与环境学报,2005,5(4):90–93.(ZHOU Gang,CHENG Weimin.Application of improved fuzzy grey correlation analysis to appraisal of factors influencing personal thermal comfort degree[J].Journal of Safety and Environment,2005,5(4):90–93.(in Chinese))
[10]邓聚龙.灰预测与灰决策[M].武汉:华中科技大学出版社,2002:45–110.(DENG Julong.Grey forecast and grey decision-making[M].Wuhan:Huazhong University of Science and Technology Press,2002:45–110.(in Chinese))
[2]王峻,王兰民,王平,等.不同地区饱和黄土液化特性研究[J].水文地质工程地质,2011,38(5):54–57.(WANG Jun,WANG Lanmin,WANG Ping,et al.A study of liquefaction characteristics of saturated loess in different regions[J].Hydrogeology and Engineering Geology,2011,38(5):54–57.(in Chinese))
[3]李保雄,苗天德.黄土抗剪强度的水敏感性特征研究[J].岩石力学与工程学报,2006,25(5):1 003–1 008.(LI Baoxiong,MIAO Tiande.Reserch on water sensitivity of loess shear strength[J].Rock Mechanics and Engineering,2006,25(5):1 003–1 008.(in Chinese))
[4]WANG P,WANG L M,WANG Q,et al.Study on critical shear wave velocity of saturated loess foundation soil liquefaction under different seismic magnitudes action[J].Advanced Materials Research,2012,594/597:1 720–1 726.
[5]SEED R B,CETIN K O,MOSS R E S,et al.Recent advances in soil liquefaction engineering:a unified and consistent framework[C]//Proceedings of the 26th Annual ASCE Los Angeles Geotechnical Spring Seminar.[S.l.]:[s.n.],2003:42–62.
[6]王谦.饱和黄土液化势的物性指标评价和深度下限研究[硕士学位论文][D].兰州:中国地震局兰州地震研究所,2011.(WANG Qian.Physical indicators evaluation of liquefaction potential and depth lower limit research of saturated Loess[M.S.Thesis][D].Lanzhou:Lanzhou Institute of Seismology,CEA,2011.(in Chinese))
[7]侯云亮.西安地区黄土地基剪切波速与工程特性相关性的研究[硕士学位论文][D].西安:长安大学,2007.(HOU Yunliang.Research on correlation between shear wave velocity and engineering properties of soil in Xi'an area loess ground[M.S.Thesis][D].Xi'an:Changan University,2007.(in Chinese))
[8]赵艳林,梅占馨.模糊灰关联模式识别方法及其应用[J].系统工程理论与实践,1996,(6):67–70.(ZHAO Yanlin,MEI Zhanxin.Pattern recognition method based on fuzzy grey incidence and its application[J].System Engineering Theory and Practice,1996,(6):67–70.(in Chinese))
[9]周刚,程卫民.改进的模糊灰色关联分析法在热舒适度影响因素评定中的应用[J].安全与环境学报,2005,5(4):90–93.(ZHOU Gang,CHENG Weimin.Application of improved fuzzy grey correlation analysis to appraisal of factors influencing personal thermal comfort degree[J].Journal of Safety and Environment,2005,5(4):90–93.(in Chinese))
[10]邓聚龙.灰预测与灰决策[M].武汉:华中科技大学出版社,2002:45–110.(DENG Julong.Grey forecast and grey decision-making[M].Wuhan:Huazhong University of Science and Technology Press,2002:45–110.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心