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.
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)
出处
《河南科技》
2023年第10期54-58,共5页
Henan Science and Technology
关键词
粉土
液化
地基处理
CFG桩+振冲碎石桩
silt
liquefaction
foundation treatment
CFG pile+vibro-replacement stone column pile
