高速铁路载体桩复合地基施工技术

Construction Technology of Composite Foundation of Piles with Bearing Base in High-speed Railway

结合近些年来载体桩在各大工程领域中施工及应用的经验,对载体桩的工程特点和适用条件进行了总结分析。首次将载体桩应用于高速铁路路基加固,结合京沪高速铁路廊坊段现场施工情况,介绍了载体桩在高速铁路应用中的施工工艺和施工流程。通过重型动力触探试验检验了载体桩对桩周土体的挤密效果,分析探讨了载体桩加固挤密区的范围。

The application conditions and engineering properties of piles with bearing base are summarized and analyzed on the basis of the engineering experience in some projects in recent years. For the first time, piles with bearing base are used in high-speed railway. Construction technology and process of piles with bearing base in high-speed railway is detailed combined with field construction in Langfang Segment of Beijing--Shanghai High-speed Railway, and the compaction effect of piles with bearing base is checked by heavy dynamic sounding test, then the compaction area of piles with bearing base is analyzed and discussed.