【摘要】 简述了水泥粉煤灰碎石桩(Cement Fly-ash Gravel,缩写CFG)复合地基的研究成果和研究现状.主要从褥垫层的设置原理、负摩阻力的特性和影响、沉降计算方法及承载力计算以及有限元分析等方面对CFG桩复合地基进行了分析、总结和评价,重点是对近5年的研究成果做了分析、总结和评价.分析结果表明,CFG桩复合地基的研究已经有了很大的进展,但其研究成果都具有各自的局限性,理论研究仍不能满足工程实践的需要.就此,本文对CFG桩复合地基未来的发展方向和值得进一步研究的问题进行了预测和展望.更多还原

【Abstract】 This paper briefly describes the research on the achievement and status of the Cement Fly-ash Gravel pile,or CFG,of composite foundation.It makes an overall analysis,summary,and evaluation of the CFG pile composite foundation referring to the principle of mattress layer setting,characteristic and influence of negative skin friction resistance,settlement calculation method,bearing capacity calculation and finite element analysis of the CFG pile composite foundation, especially for the last five years.The study shows that,the work has made very big progress,but limitations still exist.The theoretical research can not meet the needs of engineering practice yet. Finally,this paper points out that the prospects and future development of CFG pile composite foundation is still worthy of further study.更多还原