基于三轴试验的软土震陷简化计算方法研究
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摘要
本文通过对天津滨海新区典型软土的静、动力学试验,分析了软土残余应变的变化规律,提出了结合地区震陷经验系数的软土震陷简化计算方法,并利用1976年唐山7.8级地震中天津塘沽地区软土震陷观测资料对计算方法进行了验证。结果表明,本方法用于估算自由地表震陷量是可行的,对中小工程中软土震陷量的估算具有一定的参考价值。
Based on the static and dynamic mechanical test of soft soil in Tianjin, we analyzed change law of residual strain of soft soil. The estimation method based on static algorithm and empirical coefficient is developed to compute the seismic settlement of soft soil. By comparing the calculated results with the measured data in the 1976 Tangshan earthquake, we proved that this method is feasible. It can be used to estimate the seismic settlement of soft soil in small and middle scale engineering project.
Based on the static and dynamic mechanical test of soft soil in Tianjin, we analyzed change law of residual strain of soft soil. The estimation method based on static algorithm and empirical coefficient is developed to compute the seismic settlement of soft soil. By comparing the calculated results with the measured data in the 1976 Tangshan earthquake, we proved that this method is feasible. It can be used to estimate the seismic settlement of soft soil in small and middle scale engineering project.
引文
陈国兴,李方明,从卫民,2004.多层建筑物地基震陷的简化计算方法及其影响因素分析.防灾减灾工程学报,24(1):47-52.
陈建峰,俞松波,叶铁锋等,2008.软土地基加筋石灰土路堤离心模型试验研究.岩石力学与工程学报,27(2):287-293.
刘恢先,1986.唐山大地震震害-第二册.北京:地震出版社.
江席苗,2009.汶川地震地基基础震害调查研究.上海:同济大学.
李冬,陈培雄,吕小飞等,2011.软土地震震陷研究现状综述.工程抗震与加固改造,33(2):130-135.
孟上九,袁晓铭,孙锐,2002.建筑物不均匀震陷机理的振动台实验研究.岩土工程学报,24(6):747-751.
吴跃东,2008.软土震陷计算方法及影响研究.南京:河海大学.
王建华,要明伦,1993.饱和软粘土振动弱化特性的研究.水利学报,12:37-43.
谢君斐,石兆吉,郁寿松等,1988.液化危害性分析.地震工程与工程振动,8(1):61-77.
谢君斐,石兆吉,1981.神头电厂地基震陷的初步分析.中国科学院工程力学研究所.
杨石红,刘静蓉,刘金珠等,1997.软弱地基土层震陷简化计算方法研究.世界地震工程,13(2):53-61.
郁寿松,石兆吉,1989.土壤震陷试验研究.岩土工程学报,11(4):35-44.
中国科学院工程力学研究所,1979.海城地震震害.北京:地震出版社.
张建毅,张宇东,徐国栋,王强,2012.软土震陷判别方法分析及工程应用.世界地震工程,28(3):53-59.
周健,蔡宏英,许朝阳,2000.软粘土地基震陷分析.工程抗震,(1):40-42,39.
Lee K.L.,1974.Seismic Permanent Deformation in Earth Dams.School of Engineering and Applied Science,University of California,Los Angeles,California,December.
Monismith C.L.,Ogawa N.,Freeme C.R.,1975.Permanent deformation characteristics of subgrade soils due to repeated loading.Transp.Res.Rec.No.537.Transportation Research Board.Washington D.C.:1-17.
Narikawa M.,Ohshima Y.,Nishimura I.,et al.,1999.Settlement and seismic behavior of florting foundation on thick cohesive strata.In:Seco e Pointo,ed.Earthquake Geotechnical Engineering.Rotterdam:A ABalkema.421-426.
Seed H.B.and Clarence K.C.,1966.Clay Strongth under Earthquake loading Condition,Journal of the Soil Mechanics and Foundation Division,ASCE,1992,SMZ,March.
陈建峰,俞松波,叶铁锋等,2008.软土地基加筋石灰土路堤离心模型试验研究.岩石力学与工程学报,27(2):287-293.
刘恢先,1986.唐山大地震震害-第二册.北京:地震出版社.
江席苗,2009.汶川地震地基基础震害调查研究.上海:同济大学.
李冬,陈培雄,吕小飞等,2011.软土地震震陷研究现状综述.工程抗震与加固改造,33(2):130-135.
孟上九,袁晓铭,孙锐,2002.建筑物不均匀震陷机理的振动台实验研究.岩土工程学报,24(6):747-751.
吴跃东,2008.软土震陷计算方法及影响研究.南京:河海大学.
王建华,要明伦,1993.饱和软粘土振动弱化特性的研究.水利学报,12:37-43.
谢君斐,石兆吉,郁寿松等,1988.液化危害性分析.地震工程与工程振动,8(1):61-77.
谢君斐,石兆吉,1981.神头电厂地基震陷的初步分析.中国科学院工程力学研究所.
杨石红,刘静蓉,刘金珠等,1997.软弱地基土层震陷简化计算方法研究.世界地震工程,13(2):53-61.
郁寿松,石兆吉,1989.土壤震陷试验研究.岩土工程学报,11(4):35-44.
中国科学院工程力学研究所,1979.海城地震震害.北京:地震出版社.
张建毅,张宇东,徐国栋,王强,2012.软土震陷判别方法分析及工程应用.世界地震工程,28(3):53-59.
周健,蔡宏英,许朝阳,2000.软粘土地基震陷分析.工程抗震,(1):40-42,39.
Lee K.L.,1974.Seismic Permanent Deformation in Earth Dams.School of Engineering and Applied Science,University of California,Los Angeles,California,December.
Monismith C.L.,Ogawa N.,Freeme C.R.,1975.Permanent deformation characteristics of subgrade soils due to repeated loading.Transp.Res.Rec.No.537.Transportation Research Board.Washington D.C.:1-17.
Narikawa M.,Ohshima Y.,Nishimura I.,et al.,1999.Settlement and seismic behavior of florting foundation on thick cohesive strata.In:Seco e Pointo,ed.Earthquake Geotechnical Engineering.Rotterdam:A ABalkema.421-426.
Seed H.B.and Clarence K.C.,1966.Clay Strongth under Earthquake loading Condition,Journal of the Soil Mechanics and Foundation Division,ASCE,1992,SMZ,March.