陀螺桩复合砂井固结排水技术在高速公路中的应用  

Research on Application of Gyro Pile Composite Sand Well Consolidation Drainage Technology in Expressway

作　　者：莫家鹏 MO Jiapeng(Reconstruction and Expansion Management Department of Guangyun Expressway Co.,Ltd.,Yunfu Guangdong 527300,China)

机构地区：[1]广云高速公路有限公司改扩建管理处,广东云浮527300

出　　处：《广东公路交通》2024年第1期12-18,共7页Guangdong Highway Communications

摘　　要：公路工程软土地基处治是高速公路建设施工过程中难以规避的工程问题。传统的砂井固结排水技术效率低、施工周期长。近年来陀螺桩复合砂井固结排水技术逐渐应用于公路工程软基处理,该技术不仅具有扩大荷载扩散范围和改善地基不均匀沉降的优势,而且较大地缩短了超载预压稳定周期。通过对比分析陀螺桩复合砂井处治前后地基的工作性状和稳定性发现,相比于普通砂井处置地基,陀螺桩复合砂井地基竖向沉降量减少近53%、沉降稳定时间节省约45%、坡脚水平位移缩短约25%。In recent years,the consolidation and drainage technology of gyro pile composite sand well has been gradually applied to the soft foundation treatment of highway engineering.This technology not only has the advantages of expanding the load diffusion range and improving the uneven settlement of foundation,but also greatly shortens the stability period of overload preload.Consolidation and drainage of gyro pile composite sand well is a kind of shallow foundation treatment technology,which is especially suitable for soft soil foundation and sandy soil foundation in earthquake area.In this paper,the work behavior and stability of the ground before and after treatment of the gyro pile composite sand well have been compared with the common sand well treatment,the vertical settlement of the gyro pile composite sand well has been reduced by nearly 53%,and the settlement stabilization time has been saved by about 45%.The horizontal displacement of slope foot has been shortened by about 25%,which presents great engineering application potential.

关 键 词：陀螺桩 袋装砂井 软土路基 高速公路 

分 类 号：U416.16[交通运输工程—道路与铁道工程]