变截面螺纹桩在重载铁路路基中的应用研究

摘要

According to the distribution law of the additional stress of the pile,the section design of the large and small section of the variable cross section screw pile is in accordance with the distribution law of the additional stress of the pile body,and the lateral resistance of the pile is greatly improved.In this paper,combined with the screw pile in Mongolia and China Railway Heavy Haul MHTJ-26 section of soft soil embankment foundation treatment in trial pile construction,from the aspects of construction technology,construction requirements and pile test,the application of screw pile in soft founda-tion treatment of railway heavy haul are summarized.%变截面螺纹桩上大下小的分段设计符合桩身附加应力的分布规律，全长带有螺牙的桩体，极大地提升了桩周土体的侧阻力。本文结合螺纹桩在蒙华重载铁路 MHTJ-26标软土路堤地基处理中的试桩施工情况，从施工工艺、施工要求及桩基检测等方面，对螺纹桩在重载铁路软基处理中的应用进行了总结。