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以郑西客运专线为工程背景,分析DDC(Down Hole Dy-nam ic Compaction,简称DDC技术)桩法(孔内深层强夯技术)控制深厚湿陷性黄土地基工后沉降的机理及其技术优势,提出DDC桩法工后沉降计算及参数选取模式,结合具体工点进行设计分析,为铁路客运专线的设计提供参考。
Taking the Zhengzhou-Xi’an Passenger Dedicated Line as the engineering background, this paper analyzes the mechanism and technical superiority of DDC (DDC) pile method (Deep-hole Dynamic Compaction Technology) to control post-construction settlement of deep collapsible loess foundation , Put forward DDC post-construction settlement calculation and parameter selection mode, combined with specific engineering design and analysis of points for the design of railway passenger dedicated line.