水泥土桩加固不同干密度液化土孔隙水压力分析
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摘要
该文通过室内模拟地震荷载,对水泥土桩加固不同干密度液化土进行振动台试验,得出不同干密度条件的未加固或加固地基土在相同埋深处的孔隙水压力变化规律,探讨水泥土桩在不同干密度条件下抗液化效果,揭示出水泥土桩加固液化土复合地基的排水效果不明显,抗液化性能不佳,提示在工程应用中要慎重选择。
With simulation seismic loads in a laboratory,the vibration table experiment of the liquefied soil improved by soil-cement piles are carried on.a variety of pore water pressure of non-improved and improved soil under the same buried depths and different dry density is utilized to discuss liquefaction effects of soil-cement pile at different dry density.It is revealed that the drainage effects of soil-cement piles is not evident and the liquefaction effects of is not considerable.It should be carefully chosen in engineering applications.
With simulation seismic loads in a laboratory,the vibration table experiment of the liquefied soil improved by soil-cement piles are carried on.a variety of pore water pressure of non-improved and improved soil under the same buried depths and different dry density is utilized to discuss liquefaction effects of soil-cement pile at different dry density.It is revealed that the drainage effects of soil-cement piles is not evident and the liquefaction effects of is not considerable.It should be carefully chosen in engineering applications.
引文
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[2]王建华,冯士伦.液化土层中桩基水平承载力特性分析[J].岩土力学,2005,26(10):76―80.Wang Jianhua,Feng Shilun.Research on lateralresistance of pile foundation in liquefaction strata[J].Rock and Soil Mechanics,2005,26(10):76―80.(inChinese)
[3]章定文,刘松玉.水泥土桩复合地基动力效应研究进展[J].地震工程与工程振动,2006,26(2):149―155.Zhang Dingwen,Liu Songyu.The state of art of dynamicanalysis of soil-cement columns composite subgrade[J].Earthquake Engineering and Engineering Vibration,2006,26(2):149―155.(in Chinese)
[4]景立平,崔杰,李立云.粉土液化的小型振动台试验研究[J].地震工程与工程振动,2004,24(3):145―151.Jing Liping,Cui Jie,Li Liyun.Small shaking tablemodeling of silty soil liquefaction[J].EarthquakeEngineering and Engineering Vibration,2004,24(3):145―151.(in Chinese)
[5]黄春霞,张鸿儒,隋志龙,靳建军.饱和砂土地基液化特性振动台试验[J].岩土工程学报,2006,28(12):2098―2103.Huang Chunxia,Zhang Hongru,Sui Zhilong,Jin Jianjun.Shaking table tests on liquefaction properties of saturatedsand ground[J].Chinese Journal of GeotechnicalEngineering,2006,28(12):2098―2103.(in Chinese)
[6]牛琪瑛,徐增杰.水泥土桩复合地基的抗液化研究[J].工程力学,2009,26(增刊I):67―71.Niu Qiying,Xu Zengjie.Reserch on liquefactionresistance of composite subgrade for sail-cement column[J].Engineering Mechanics,2009,26(Suppl I):67―71.(in Chinese)
[7]Matsuda T,Goto Y.Studies on experimental techniqueof shaking table test for geotechnical problems[C].Proceeding of the 9th World Conference on EarthquakeEngineering.Tokyo,1988,8:837―842.
[8]牛琪瑛,杨庆陶,闫卫泽.饱和砂土振动台试验中宏观液化现象的研究[C].第10届土力学及岩土工程学术会议论文集,2007,III:624―627.Niu Qiying,Yang Qingtao,Yan Weize.Study onmacroscopic phenomena of saturated sand liquefaction inshaking table test[C].10th Soil Mechanics andGeotechnical Engineering Conference Proceedings,2007,III:624―627.(in Chinese)
[9]Niu Qiying,Yan Weize,Yang Qingtao,Wei Jianwei.Research on liquefaction of sandy soil in shaking tabletest[C].9th International Symposium on EnvironmentalGeotechnology and Sustainable Development,2008:435―441.
[10]牛琪瑛,郭英,吴永娟,张明.碎石桩加固不同密实度液化土的孔隙水压力变化规律探讨[J].工程力学,2010,27(增刊I):159―163.Niu Qiying,Guo Ying,Wu Yongjuan,Zhang Ming.Study on pore water pressure variation of differentdensity liquefiable sand soil reinforced by gravel pile[J].Engineering Mechanics,2010,27(Suppl I):159―163.(in Chinese)
[11]徐增杰.水泥土桩体加固不同密实度液化砂土的振动台试验研究[D].太原:太原理工大学,2009.Xu Zengjie.The shaking table experimental study onliquefiable sand soil of different densities improved bysoil-cement piles[D].Taiyuan:Taiyuan University ofTechnology,2009.(in Chinese)
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