素土挤密桩在渠道湿陷性黄土中的应用

Application of plain soil compaction pile in collapsible loess in embankment canal

湿陷性黄土地基在遇水发生变形或在上部结构的自重及外荷载作用下会产生过大变形,通常的处理方法有强夯、翻压,但这些传统方案在处理已经筑堤的渠道时成本较高,因为处理地基时需要拆除原有筑堤才能强夯、翻压。如何用素土挤密桩既减少工期又减少费用地解决湿陷性黄土地基问题,以南水北调中线工程漳古段SG3标段为例进行了详细分析。

The collapsible loess foundation will be deformed when it meets the water or when the superstructure is subjected to the dead weight and external load.The construction of the canal will seriously affect the safety and quality of the project.The usual treatment methods are dynamic compaction and overturning,but these traditional schemes are not economical when dealing with the channel which has been built dike,because it is necessary to remove the original dike before dynamic compaction and overturning.How to solve the problem of collapsible loess foundation with plain soil compaction piles,which can reduce both construction period and cost,is analyzed in detail by taking the SG3 tender section of Zhanggu section of the middle route of South-to-North Water Transfer Project as an example.