客运专线铁路软土地基加固CFG桩施工技术

研究目的:探讨有关客运专线路基地基加固CFG桩的施工。研究结果:要保证CFG桩的成桩质量达到设计要求关键在于:(1)对地质情况进行复核,确保现场情况与设计情况相符;(2)大面积施工前,必须选取有代表性的地段进行工艺性成桩试验,确定各项施工参数;(3)成桩后的成品保护及截桩方法十分关键;(4)桩间土的夯实;(5)控制充盈系数,得到良好的经济效果。

Construction Technique of CFG Pile for Reinforcing Soft Soil Foundation of Railway Passenger Dedicated Line

Research purposes:The purposes are to make discussion on the construction technique of CFG pile for reinforcing the subgrade foundation of railway passenger dedicated line. Research results:The key points of ensuring the pile-forming quality of CFG pile to satisfy the design requirement are as follows:(1)The geological condition should be checked so as to conform the design to real site conditions;(2)Before conducting construction in extensive area,the typical section should be selected for the process test of pile-forming in order to determine the relative construction parameters;(3)The protection of ready-made articles after pile forming and pile cutting method are crucial;(4)The soils between piles should be compacted;(5)The filling index should be controlled for obtaining a perfect economic achievement.