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饱和弱化与液化土层的水平极限抗力

, PP. 37-42

Keywords: 桩水平极限抗力,液化砂中的桩,砂土液化,p-y曲线

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Abstract:

通过给饱和砂土层施加反压,模拟地震荷载作用下具有残余孔压的饱和弱化、液化土层.选择粉质细砂与细砂,进行了18组水平荷载作用下桩与饱和弱化、液化土层相互作用的模型试验,研究了饱和弱化、液化土层水平极限抗力随土层残余孔压增加的变化规律.结果表明,随土层中残余孔压增加,水平极限抗力逐渐降低,土层液化后的水平极限抗力大约降低80%~90%.通过定义饱和弱化、液化土层的强度,定量分析了饱和弱化、液化砂土的强度参数与水平极限抗力之间关系.又通过引入土层的残余孔压比折减系数,建立了确定饱和弱化、液化土层等效强度的关系式,进而提出了一种按等效强度确定饱和弱化、液化土层水平极限抗力的方法.

References

[1]  Wilson DW,Boulanger R W,Kutter B L.Seismic lateralres istance of liquefying sand[J].Journal of Geotechnical and Geoen vironm ental Eng-ineering,ASCE,2000,126(10):898-906.
[2]  Liu L,Dobry R.E ffect of liquefaction on lateral response of piles by centrifugem odeltests[R].National Center for Earthquake Engineering Research Bulletin,New York,1995.
[3]  王建华,冯士伦.液化土层中桩基水平承载特性分析[J].岩土力学,2005,26(10):1597-1601. Wang Jianhua,Feng Sh ilun.Research on lateral resistance of pile foundation in liquefaction strata[J].Rock and Soil Mechanics,2005,26 (10):1597-1601.
[4]  Wang S T,Resse L C.Design of pile foundations in liquefied soils[C]//Proceeding of Geotechnical Earthquake Engineering and Soil Dynamic Conference,Geotechnical Special Publication,ASCE,1998,75(2):1331-1343.
[5]  AshourM,Norris G,Pilling P.Lateral loading of a pile in layered soil using the strain wedgemodel[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,1998,124(4):303-315.
[6]  A shourM,Norris G.Liquefaction and und rained response evaluation of sands from drained form u lat ion[J].Journal of Geotechnicaland Geoenvi-ronm ental Engineering,ASCE,1999,125(8):649-658.
[7]  AshourM,Norris G.Modeling lateral soilpile respon se on soilpile interaction[J].Journal of Geotechnical and Geoenvironmental Engineering, ASCE,2000,126(5):420-428.
[8]  Weaver T L,Ashford S Aand Rollins K M.Discussion of response of a 0.6m cas-tin-steel-shell pile in liquefied soil under lateral Loading by Weaver T J,Ashford S A and Rollins K M[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2006,132(9):1238.
[9]  王建华,戚春香.按土强度参数确定弱化砂土水平极限抗力的探讨[J].天津大学学报,2008,41(4):454-460. Wang Jianhua,Qi Chunxiang.Ultmiate lateral resistances of degradation stratum detemrined based on soil strength parameter[J].Journal of Tian jin University,2008,41(4):454-460.
[10]  王建华,戚春香,余正春,等.弱化饱和砂土中桩的p-y曲线与极限抗力研究[J].岩土工程学报,2008,30(3):309-315. Wang Jianhua,Qi Chunxiang,Yu Zhengchun,et al. The p-y curves and lateral resistances of piles in saturated degrad ation sand[J].Chinese Journal of Geotechnical Engineering,2008,30(3):309-315.
[11]  Resse L C,CoxW R.Analysis of laterally-loaded piles in sand[C]//Proceeding of the 4 th Offshore Technology Conference,Houston,1974, Paper No.2080.
[12]  冯士伦.可液化土层中桩基横向承载特性研究[D].天津:天津大学,2004. Feng Shilun.The research on lateral bearing behavior of the pile foundation in lique fiable soil[D].Tianjin:Tian jin University,2004.

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