水泥土桩复合地基的抗液化研究
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摘要
该文通过对未加固与水泥土桩加固模型地基振动台试验,再现了未加固和水泥土桩加固模型土体宏观液化现象,分析了未加固和水泥土桩加固模型土孔隙水压力、孔压比及承压板沉降的变化规律,得出水泥土桩加固液化土地基不仅能够提高地基土的抗液化能力,也能抑制桩间土体的沉降。
By the shaking table test,the macro-liquefaction of the foundation reinforced by cement-soil piles and the one unreinforced was observed.And the variation law of the pore water pressure,the pore water pressure ratio and settlement of the foundation were analyzed.It is found that the soil-cement column could provide a beneficial effect both on the resistance to liquefaction and reduction of subgrade settlements.
By the shaking table test,the macro-liquefaction of the foundation reinforced by cement-soil piles and the one unreinforced was observed.And the variation law of the pore water pressure,the pore water pressure ratio and settlement of the foundation were analyzed.It is found that the soil-cement column could provide a beneficial effect both on the resistance to liquefaction and reduction of subgrade settlements.
引文
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[7]汪幼江,王天龙.砂和粉土液化的振动箱试验[J].大坝观测与土工测试,1999,23(6):28―31.Wang Youjiang,Wang Tianlong.Vibration box test of liquefaction of sand and silty soil[J].Dam Observation and Geotechnical Tests,1999,23(6):28―31.(in Chinese)
[8]徐增杰,牛琪瑛,闫卫泽.砂桩加固液化砂土振动台试验中的孔隙水压力[J].山西建筑,2008,34(32):7―8.Xu Zengjie,Niu Qiying,Yan Weize.Study on the pore water pressure of saturated sand in the shaking table test of liquefiable sand soil improved by granular sand pile[J].Shanxi Architecture,2008,34(32):7―8.(in Chinese)
[9]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 on macroscopic phenomena of saturated sand liquefaction in shaking table test[C].10th Soil Mechanics and Geotechnical Engineering Conference Proceedings,2007,III:624―627.(in Chinese)
[10]Niu Qiying,Yan Weize,Yang Qingtao,Wei Jianwei.Research on liquefaction of sandy soil in shaking table test[C].9th International Symposium on Environmental Geotechnology and Sustainable Development,2008.
[2]谢定义.土动力学[M].西安:西安交通大学出版社,1988.Xie Dingyi.Soil dynamics[M].Xi’an:Xi’an Jiaotong University Press,1988.(in Chinese)
[3]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 lateral resistance of pile foundation in liquefaction strata[J].Rock and Soil Mechanics,2005,26(10):76―80.(in Chinese)
[4]闫卫泽.散体材料砂桩加固液化砂土的振动台试验研究[D].太原:太原理工大学,2007.Yan Weize.The shaking table experimental study on liquefiable sand soil improved by granular sand pile[D].Taiyuan:Taiyuan University of Technology,2007.(inChinese)[5]Matsuda T,Goto Y.Studies on experimental technique of shaking table test for geotechnical problems[C].Proceeding of the9th World Conference on Earthquake Engineering.Tokyo,1988,8:837―842.
[6]闫卫泽,牛琪瑛,杨庆陶.复合地基抗液化振动台试验中模型的制备[J].山西建筑,2007,33(4):89―90.Yan Weize,Niu Qiying,Yang Qingtao.Preparation of model in shaking table test on liquefaction resistance of composite subgrade[J].Shanxi Architecture,2007,33(4):89―90.(in Chinese)
[7]汪幼江,王天龙.砂和粉土液化的振动箱试验[J].大坝观测与土工测试,1999,23(6):28―31.Wang Youjiang,Wang Tianlong.Vibration box test of liquefaction of sand and silty soil[J].Dam Observation and Geotechnical Tests,1999,23(6):28―31.(in Chinese)
[8]徐增杰,牛琪瑛,闫卫泽.砂桩加固液化砂土振动台试验中的孔隙水压力[J].山西建筑,2008,34(32):7―8.Xu Zengjie,Niu Qiying,Yan Weize.Study on the pore water pressure of saturated sand in the shaking table test of liquefiable sand soil improved by granular sand pile[J].Shanxi Architecture,2008,34(32):7―8.(in Chinese)
[9]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 on macroscopic phenomena of saturated sand liquefaction in shaking table test[C].10th Soil Mechanics and Geotechnical Engineering Conference Proceedings,2007,III:624―627.(in Chinese)
[10]Niu Qiying,Yan Weize,Yang Qingtao,Wei Jianwei.Research on liquefaction of sandy soil in shaking table test[C].9th International Symposium on Environmental Geotechnology and Sustainable Development,2008.
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