液化场地土-地铁车站结构大型振动台模型试验研究
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摘要
本文对浅埋于可液化南京细砂地基中的地铁车站结构进行了大型振动台试验研究,对部分试验结果进行了整理,分析了模型地基的加速度和振动孔隙水压力的反应规律。试验结果表明:在整个试验过程中,模型地基浅层土和地铁车站侧向附近地基土最容易发生液化;其次,随着振动台台面输入地震动峰值加速度的增大,离车站结构较远的侧向地基土和底层地基土再发生液化,而车站结构正下方的模型地基土最不容易液化。同时,在模型地基土发生液化后,地铁车站结构发生了明显的整体上浮现象。
A large-scale shaking table test for subway station structure built in the liquefiable saturated fine sand soil is implemented.Partial test results are analyzed in this paper.The acceleration time-histories and the dynamic pore water pressure ratio time-histories of ground soils are given.During the whole process of testing,it is obvious that the soils at the top of model ground and beside the subway station structure is liquefied firstly.Then the soil far from the subway station structure and at the bottom of model ground is liquefied with the increasing of the peak value of acceleration inputted by the surface of shaking table.However,the soils under the subway station structure is not liquefied during the whole process of testing.At the same time,the subway station structure uplifts badly during the soil liquefaction.
A large-scale shaking table test for subway station structure built in the liquefiable saturated fine sand soil is implemented.Partial test results are analyzed in this paper.The acceleration time-histories and the dynamic pore water pressure ratio time-histories of ground soils are given.During the whole process of testing,it is obvious that the soils at the top of model ground and beside the subway station structure is liquefied firstly.Then the soil far from the subway station structure and at the bottom of model ground is liquefied with the increasing of the peak value of acceleration inputted by the surface of shaking table.However,the soils under the subway station structure is not liquefied during the whole process of testing.At the same time,the subway station structure uplifts badly during the soil liquefaction.
引文
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[4]Trautmann C H,O’Rourke T D,Kulhawy F D.Uplift force-displacement response of buried pipe[J].Journal of Geotechnical Engineering,ASCE,1985,111(9):1061-1076.
[5]Mohri Y,Kawabata T,Ling HI.Experimental study on the effects of vertical shaking on the behavior of underground pipelines[C]//Proceedingsof Second International Conference on Earthquake Geotechnical Engineering.Rotterdam:Balkema,489-494.
[6]邹德高,孔宪京,Ling H I,等.地震时饱和砂土地基中管线上浮机理及抗震措施试验研究[J].岩土工程学报,2002,24(3):323-326.
[7]Orense R P,Morimoto I,Yamamoto Y,et al.Study on wall-type gravel drains as liquefaction countermeasure for underground structures[J].SoilDynamic and Earthquake Engineering,2003,23:19-39.
[8]刘华北,宋二祥.考虑土体分层性的大型地下结构地震液化上浮响应研究[J].现代隧道技术,2004(增刊):244-250.
[9]刘华北,宋二祥.可液化土中地铁结构的地震响应[J].岩土力学,2005,26(3):381-391.
[10]陈国兴,庄海洋,程绍革,等.土-地铁隧道动力相互作用的大型振动台试验-试验方案设计[J].地震工程与工程振动,2006,26(6):178-183.
[11]陈国兴,庄海洋,杜修力,等.土-地铁隧道动力相互作用的大型振动台试验-试验结果分析[J].地震工程与工程振动,2007,27(1):164-170.
[12]陈国兴,庄海洋,杜修力,等.土-地铁车站结构动力相互作用大型振动台模型试验研究.地震工程与工程振动,2007,27(2):171-176.
[2]Koseki J,Matsuo O,Sasaki T,et al.Damage to sewer pipes during the 1993 Kushiro-Oki and the 1994 Hokkai-do-Toho-Oki earthquake[J].Soils and Foundations,2000,40(1):99-111.
[3]Newmark N M,Hall W J.Pipeline design to resist large fault displacement[C]//Proceedings of First US Conference on Earthquake Engineer-ing.Amm Arbor,1975:416-425.
[4]Trautmann C H,O’Rourke T D,Kulhawy F D.Uplift force-displacement response of buried pipe[J].Journal of Geotechnical Engineering,ASCE,1985,111(9):1061-1076.
[5]Mohri Y,Kawabata T,Ling HI.Experimental study on the effects of vertical shaking on the behavior of underground pipelines[C]//Proceedingsof Second International Conference on Earthquake Geotechnical Engineering.Rotterdam:Balkema,489-494.
[6]邹德高,孔宪京,Ling H I,等.地震时饱和砂土地基中管线上浮机理及抗震措施试验研究[J].岩土工程学报,2002,24(3):323-326.
[7]Orense R P,Morimoto I,Yamamoto Y,et al.Study on wall-type gravel drains as liquefaction countermeasure for underground structures[J].SoilDynamic and Earthquake Engineering,2003,23:19-39.
[8]刘华北,宋二祥.考虑土体分层性的大型地下结构地震液化上浮响应研究[J].现代隧道技术,2004(增刊):244-250.
[9]刘华北,宋二祥.可液化土中地铁结构的地震响应[J].岩土力学,2005,26(3):381-391.
[10]陈国兴,庄海洋,程绍革,等.土-地铁隧道动力相互作用的大型振动台试验-试验方案设计[J].地震工程与工程振动,2006,26(6):178-183.
[11]陈国兴,庄海洋,杜修力,等.土-地铁隧道动力相互作用的大型振动台试验-试验结果分析[J].地震工程与工程振动,2007,27(1):164-170.
[12]陈国兴,庄海洋,杜修力,等.土-地铁车站结构动力相互作用大型振动台模型试验研究.地震工程与工程振动,2007,27(2):171-176.
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