江门大道北线K13+620~K16+200段软基路基施工技术

Construction technology of soft foundation subgrade for K13+620~K16+200 section of Jiangmen avenue north line

江门大道北线BT项目快速路工程是江门市三纵四横快速路网体系中最重要的一纵。结合该工程K13+620~K16+200段海相平原,地势低平、鱼塘分布密集,且塘底浮泥较厚(0.5 m^3 m)工程实际情况,提出了成套的软基路基施工方案。采用的CFG桩、高压旋喷桩、预应力管桩等软基处理技术措施及该区段的路基填筑技术,为架梁通道的按期形成创造了有利条件,在工期紧、沉降变形可控的情况下确保了最终工程质量。该套施工技术措施对于同类工程具有重要的借鉴意义。

The expressway project of BT project of Jiangmen avenue north line is the most important one in the three vertical and four horizontal expressway network system of Jiangmen City.In this paper,a complete set of construction scheme for soft foundation subgrade is proposed based on the actual situation of the project in K13+620~K16+200 section of marine plain with low and flat terrain,dense fish ponds and thick floating mud(0.5 m^3 m)at the pond bottom.The adoption of CFG pile,high-pressure jet grouting pile,prestressed pipe pile and other soft foundation treatment measures as well as the subgrade filling technology in this section has created favorable conditions for the timely formation of girder erecting channel,and ensured the final project quality under the condition of tight construction period and controllable settlement and deformation.This set of construction technical measures has important reference significance for similar projects.