CFG桩+振冲碎石桩处理液化粉土地基试验研究  

A Field Experimental Study of Composite Foundation with CFG Pile+Vibro-Replacement Stone Column in Liquefaction Area

作　　者：马常泉 马强 马淑栩 王哲 MA Changquan;MA Qiang;MA Shuxu;WANG Zhe(Henan Urban and Rural Water Research Institute Co.,Ltd.,Zhengzhou 450000,China;Monash University,Melbourne 8070,Australia;Shanghai Jian Qiao University,Shanghai 200120,China)

机构地区：[1]河南省城乡水务研究院有限公司,郑州河南450000 [2]蒙纳士大学,澳大利亚墨尔本8070 [3]上海建桥学院,上海200120

出　　处：《河南科技》2023年第10期54-58,共5页Henan Science and Technology

摘　　要：【目的】CFG桩+振冲碎石桩可提高原始地基承载力,并达到消除土体液化之目的。【方法】选择开封地区的粉土地基作为研究对象,采用CFG桩+振冲碎石桩组合型地基的处理方法,通过现场试验验证处理效果。【结果】结果表明:经过CFG桩+振冲碎石桩复合地基处理后的粉土地基强度显著提高,并且强度变得略微均匀一些,液化基本得到消除。【结论】采用该方法处理后,地基承载力特征值从桩间土的75 kPa,增至复合地基的300 kPa,满足荷载要求。[Purposes]CFG pile+vibro-replacement stone column pile can improve the bearing capacity of the original foundation and achieve the purpose of eliminating soil liquefaction.[Methods]Silt founda-tion in Kaifeng area was selected as the research object to verify the combination of foundation treatment for CFG pile+vibro-replacement stone column pile methods.[Findings]The results show that the strength of the silty soil foundation treated by CFG pile+vibro-replacement stone column pile compos-ite foundation is significantly improved,and the strength becomes slightly more uniform,and the lique-faction is basically eliminated.[Conclusions]After using this method,the characteristic value of bearing capacity of foundation increases from 75 kPa of soil between piles to 300 kPa of composite foundation,which meets the load requirements.

关 键 词：粉土 液化 地基处理 CFG桩+振冲碎石桩 

分 类 号：TU473.1[建筑科学—结构工程]