爆破地震作用下CFG桩复合地基动力特性的数值分析
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摘要
该文以CFG桩复合地基在爆破地震作用下的现场动力试验为背景,应用有限元软件建立有限元动力分析的数值模拟模型,从水平加速度、竖向加速度、水平位移、竖向位移及应力几个方面对复合地基同一位置不同深度和同一深度不同位置的动力响应进行了分析,其分析结果与试验结果吻合较好。通过数值模拟对动力响应的影响因素进行了比较研究。并与天然地基的动力响应结果进行对比,得出了有指导意义的结论。为今后探讨CFG桩复合地基的承载力、变形和动力特性提供了研究基础。
Through CFG pile composite foundation dynamic test,a test model was built by using finite element analysis software.The analyses were made for the horizontal acceleration,vertical acceleration,horizontal displacement,vertical displacement and stress,which were dynamic response about the same position different depth and the same depth different locations.The analysis results of the dynamic response were in good agreement with the test results.The factors of dynamic response were studied by numerical simulation.Compared with the dynamic response results of natural foundation,we obtained the conclusions in guiding the significance.A basis is supplied for load bearing capacity,deformation and dynamic characteristics of a CFG pile composite foundation.
Through CFG pile composite foundation dynamic test,a test model was built by using finite element analysis software.The analyses were made for the horizontal acceleration,vertical acceleration,horizontal displacement,vertical displacement and stress,which were dynamic response about the same position different depth and the same depth different locations.The analysis results of the dynamic response were in good agreement with the test results.The factors of dynamic response were studied by numerical simulation.Compared with the dynamic response results of natural foundation,we obtained the conclusions in guiding the significance.A basis is supplied for load bearing capacity,deformation and dynamic characteristics of a CFG pile composite foundation.
引文
[1]罗重阳.CFG桩复合地基承载机理研究与有限元分析[D].武汉:华中科技大学,2007.Luo Chongyang.CFG pile composite foundation bearingmechanism research and finite element analysis[D].Wuhan:Huazhong University of Science andTechnology,2007.(in Chinese)
[2]唐明荣.CFG桩复合地基性状影响因素的数值模拟研究[D].北京:中国地质大学,2008.Tang Mingrong.The numerical simulation about CFGpile composite foundation character effect factors[D].Beijing:China University of Geoscience,2008.(inChinese)
[3]张建隽.CFG桩复合地基工作性状及工程应用研究[D].太原:太原理工大学,2008.Zhang Jianjun.Study on working behavior andengineering application of CFG-pile-compositefoundation[D].Taiyuan:Taiyuan University ofTechnology,2008.(in Chinese)
[4]王维玉,赵拓,丁继辉,等.CFG桩复合地基动力特性和时程响应影响因素分析[J].岩土工程学报,2010,S2(215):115―118.Wang Weiyu,Zhao Tuo,Ding Jihui,et al.Influencefactors of dynamic characteristics and response ofcement-flyash-gravel pile composite foundation[J].Chinese Journal of Geotechnical Engineering,2010,S2(215):115―118.(in Chinese)
[5]赵拓,王维玉,杨昌民,等.爆破荷载作用下夯实水泥土桩复合地基动力特性试验研究[J].黑龙江科技信息,2010(14):279.Zhao Tuo,Wang Weiyu,Yang Changmin,et al.Thedynamic test research on Rammed soil-cement compositefoundation under Blasting[J].Heilongjiang Science andTechnology Information,2010(14):279.(in Chinese)
[6]赵拓.爆破地震动作用下复合地基动力特性试验研究[D].保定:河北大学,2010.Zhao Tuo.Dynamic test of composite foundation underblasting seismic[D].Baoding:Hebei University,2010.(in Chinese)
[7]丁继辉,刘风然,杜二霞,等.水泥土和CFG组合桩复合地基动力特性分析[J].粉煤灰综合利用,2008(6):37―40.Ding Jihui,Liu Fengran,Du Erxia,et al.Dynamiccharacteristic analysis on composite foundation withsoil-cement piles and CFG piles[J].Fly AshComprehensive Utilization,2008(6):37―40.(inChinese)
[8]郑晓,廖志浓.地震作用下CFG桩复合地基动力特性分析[J].铁道建筑,2007(8):80―82.Zheng Xiao,Liao Zhinong.Analysis of dynamicperformance of composite subsoil including CFG(Cement Flyash Gravel)piles during earthquake action[J].Railway Engineering,2007(8):80―82.(in Chinese)
[9]赵拓,杨昌民,王维玉,等.爆破荷载作用下CFG桩复合地基动力特性试验研究[J].公路交通科技(应用技术版),2010,7(67):121―122.Zhao Tuo,Yang Changmin,Wang Weiyu,et al.Thedynamic test research on CFG pile composite foundationunder Blasting[J].Journal of Highway andTransportation Research and Development(AppliedTechnique),2010,7(67):121―122.(in Chinese)
[10]孟艳杰.爆破地震作用下复合地基动力有限元分析[D].保定:河北大学,2011.Meng Yanjie.Under blasting seismic dynamic finiteelement analysis of composite foundation[D].Baoding:Hebei University,2011.(in Chinese)
[2]唐明荣.CFG桩复合地基性状影响因素的数值模拟研究[D].北京:中国地质大学,2008.Tang Mingrong.The numerical simulation about CFGpile composite foundation character effect factors[D].Beijing:China University of Geoscience,2008.(inChinese)
[3]张建隽.CFG桩复合地基工作性状及工程应用研究[D].太原:太原理工大学,2008.Zhang Jianjun.Study on working behavior andengineering application of CFG-pile-compositefoundation[D].Taiyuan:Taiyuan University ofTechnology,2008.(in Chinese)
[4]王维玉,赵拓,丁继辉,等.CFG桩复合地基动力特性和时程响应影响因素分析[J].岩土工程学报,2010,S2(215):115―118.Wang Weiyu,Zhao Tuo,Ding Jihui,et al.Influencefactors of dynamic characteristics and response ofcement-flyash-gravel pile composite foundation[J].Chinese Journal of Geotechnical Engineering,2010,S2(215):115―118.(in Chinese)
[5]赵拓,王维玉,杨昌民,等.爆破荷载作用下夯实水泥土桩复合地基动力特性试验研究[J].黑龙江科技信息,2010(14):279.Zhao Tuo,Wang Weiyu,Yang Changmin,et al.Thedynamic test research on Rammed soil-cement compositefoundation under Blasting[J].Heilongjiang Science andTechnology Information,2010(14):279.(in Chinese)
[6]赵拓.爆破地震动作用下复合地基动力特性试验研究[D].保定:河北大学,2010.Zhao Tuo.Dynamic test of composite foundation underblasting seismic[D].Baoding:Hebei University,2010.(in Chinese)
[7]丁继辉,刘风然,杜二霞,等.水泥土和CFG组合桩复合地基动力特性分析[J].粉煤灰综合利用,2008(6):37―40.Ding Jihui,Liu Fengran,Du Erxia,et al.Dynamiccharacteristic analysis on composite foundation withsoil-cement piles and CFG piles[J].Fly AshComprehensive Utilization,2008(6):37―40.(inChinese)
[8]郑晓,廖志浓.地震作用下CFG桩复合地基动力特性分析[J].铁道建筑,2007(8):80―82.Zheng Xiao,Liao Zhinong.Analysis of dynamicperformance of composite subsoil including CFG(Cement Flyash Gravel)piles during earthquake action[J].Railway Engineering,2007(8):80―82.(in Chinese)
[9]赵拓,杨昌民,王维玉,等.爆破荷载作用下CFG桩复合地基动力特性试验研究[J].公路交通科技(应用技术版),2010,7(67):121―122.Zhao Tuo,Yang Changmin,Wang Weiyu,et al.Thedynamic test research on CFG pile composite foundationunder Blasting[J].Journal of Highway andTransportation Research and Development(AppliedTechnique),2010,7(67):121―122.(in Chinese)
[10]孟艳杰.爆破地震作用下复合地基动力有限元分析[D].保定:河北大学,2011.Meng Yanjie.Under blasting seismic dynamic finiteelement analysis of composite foundation[D].Baoding:Hebei University,2011.(in Chinese)
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