液化土层中桩基抗震性能研究
|
摘要
通过振动台试验,研究了饱和砂土中桩基的振动特性,对桩土振动过程中的动力相互作用有了初步的认识。根据试验结果,得到距模型桩不同位置处的砂土的动力p-y曲线与API推荐做法得到的静力p-y曲线,并对两者进行了比较,说明了饱和砂土液化降低了模型桩的横向承载能力,但并没有使模型桩的横向承载能力完全丧失。提示工程设计人员在对可液化砂层的横向承载能力进行考虑时,完全不考虑可液化砂层的横向承载能力是偏于保守的。
The behavior of the model pile in the liquefying saturated sand layer during shake is studied through the shake table test,and some results about the soil-pile dynamic interaction are obtained. According to the test results,the dynamic and static behavior of reaction force and displacement of the saturated sand in different depth is analyzed and compared. The lateral resistance of the soil decreases after the sand has liquefied,but it does not lose completely. So it is conservative that the lateral resistance of the liquefied soil is not considered when the pile in the liquefied soil is designed.
The behavior of the model pile in the liquefying saturated sand layer during shake is studied through the shake table test,and some results about the soil-pile dynamic interaction are obtained. According to the test results,the dynamic and static behavior of reaction force and displacement of the saturated sand in different depth is analyzed and compared. The lateral resistance of the soil decreases after the sand has liquefied,but it does not lose completely. So it is conservative that the lateral resistance of the liquefied soil is not considered when the pile in the liquefied soil is designed.
引文
[1]刘惠珊.桩基震害及原因分析——日本阪神大地震的启示[J].工程抗震,1999,(1):37–43.(Liu Huishan.Discussion on the typical pattern and causes of pile foundation damage—lessons from Hyogoken-Nanbu earthquake[J].Earthquake Resistant Engineering,1999,(1):37–43.(in Chinese))
[2]刘惠珊.现行抗震规范中液化土中桩基计算方法的讨论[J].工业建筑,1994,24(4):43–48.(Liu Huishan.Discussion on design methods of pile foundations in liquefiable sites[J].Industrial Construction,1994,24(4):43–48.(in Chinese))
[3]陆培炎,徐振华.地基的强度与变形计算[M].西宁:青海人民出版社,1978.(Lu Peiyan,Xu Zhenhua.The Strength and Displacement of Groundwork[M].Xining:Qinghai People′s Publishing House,1978.(in Chinese))
[4]陆培炎.桩基设计方法[J].岩石力学与工程学报,1994,13(4):375–388.(Lu Peiyan.Design method of pile foundation[J].Chinese Journal of Rock Mechanics and Engineering,1994,13(4):375–388.(in Chinese))
[5]徐礼华,刘祖德,茜平一.上部结构–桩基础–地基相互作用体系地震反应分析[J].岩石力学与工程学报,2002,21(11):1720–1723.(Xu Lihua,Liu Zude,Qian Pingyi.The earthquake response of the interaction system of superstructure-pile foundation-groundwork[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(11):1720–1723.(in Chinese))
[6]舒翔,黄雨.基桩有效桩长的确定方法[J].工业建筑,2001,31(1):72–74.(Shu Xiang,Huang Yu.Determining method for effective length of foundation pile[J].Industrial Construction,2001,31(1):72–74.(in Chinese))
[7]黄强.桩基工程若干热点技术问题[M].北京:中国建材工业出版社,1996.(Huang Qiang.Some Hot Spot Technology Questions on Pile Foundations[M].Beijing:Chinese Construction MaterialIndustrial Press,1996.(in Chinese))
[8]Ruesta P F,Townsend F C.Evaluation of laterally loaded pile group at Roosevelt bridge[J].J.Geotech.Geoenviron.Eng.,1997,123(12):1153–1161
[9]Ashour M,Norris G,Pilling P.Lateral loading of a pile in layered soil using the strain wedge model[J].J.Geotech.Geoenviron.Eng.,1998,124(4):303–315.
[10]Ashour M,Norris G.Lateral loaded pile response in liquefiable soil[J].J.Geotech.Geoenviron.Eng.,2003,129(6):404–414.
[11]Anderson J B,Townsend F C,Grajales B.Case history evaluation of laterally loaded piles[J].J.Geotech.Geoenviron.Eng.,2003,129(3):187–196.
[12]汪幼江,王天龙.砂和粉土液化的振动箱试验[J].大坝观测与土工测试,1999,23(6):28–31.(Wang Youjiang,Wang Tianlong.Vibration box test of liquefaction of sands and silty soil[J].Dam Observation and Geotechnical Tests,1999,23(6):28–31.(in Chinese))
[13]卢世深,林亚超.桩基础的计算和分析[M].北京:人民交通出版社,1987.(Lu Shishen,Lin Yachao.The Calculation and Analysis of Pile Foundation[M].Beijing:China Communications Press,1987.(in Chinese))
[2]刘惠珊.现行抗震规范中液化土中桩基计算方法的讨论[J].工业建筑,1994,24(4):43–48.(Liu Huishan.Discussion on design methods of pile foundations in liquefiable sites[J].Industrial Construction,1994,24(4):43–48.(in Chinese))
[3]陆培炎,徐振华.地基的强度与变形计算[M].西宁:青海人民出版社,1978.(Lu Peiyan,Xu Zhenhua.The Strength and Displacement of Groundwork[M].Xining:Qinghai People′s Publishing House,1978.(in Chinese))
[4]陆培炎.桩基设计方法[J].岩石力学与工程学报,1994,13(4):375–388.(Lu Peiyan.Design method of pile foundation[J].Chinese Journal of Rock Mechanics and Engineering,1994,13(4):375–388.(in Chinese))
[5]徐礼华,刘祖德,茜平一.上部结构–桩基础–地基相互作用体系地震反应分析[J].岩石力学与工程学报,2002,21(11):1720–1723.(Xu Lihua,Liu Zude,Qian Pingyi.The earthquake response of the interaction system of superstructure-pile foundation-groundwork[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(11):1720–1723.(in Chinese))
[6]舒翔,黄雨.基桩有效桩长的确定方法[J].工业建筑,2001,31(1):72–74.(Shu Xiang,Huang Yu.Determining method for effective length of foundation pile[J].Industrial Construction,2001,31(1):72–74.(in Chinese))
[7]黄强.桩基工程若干热点技术问题[M].北京:中国建材工业出版社,1996.(Huang Qiang.Some Hot Spot Technology Questions on Pile Foundations[M].Beijing:Chinese Construction MaterialIndustrial Press,1996.(in Chinese))
[8]Ruesta P F,Townsend F C.Evaluation of laterally loaded pile group at Roosevelt bridge[J].J.Geotech.Geoenviron.Eng.,1997,123(12):1153–1161
[9]Ashour M,Norris G,Pilling P.Lateral loading of a pile in layered soil using the strain wedge model[J].J.Geotech.Geoenviron.Eng.,1998,124(4):303–315.
[10]Ashour M,Norris G.Lateral loaded pile response in liquefiable soil[J].J.Geotech.Geoenviron.Eng.,2003,129(6):404–414.
[11]Anderson J B,Townsend F C,Grajales B.Case history evaluation of laterally loaded piles[J].J.Geotech.Geoenviron.Eng.,2003,129(3):187–196.
[12]汪幼江,王天龙.砂和粉土液化的振动箱试验[J].大坝观测与土工测试,1999,23(6):28–31.(Wang Youjiang,Wang Tianlong.Vibration box test of liquefaction of sands and silty soil[J].Dam Observation and Geotechnical Tests,1999,23(6):28–31.(in Chinese))
[13]卢世深,林亚超.桩基础的计算和分析[M].北京:人民交通出版社,1987.(Lu Shishen,Lin Yachao.The Calculation and Analysis of Pile Foundation[M].Beijing:China Communications Press,1987.(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