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结合京沪高铁李窑试验段工程实际,为满足路基工后沉降不大于15 mm的技术要求,采用CFG桩对无砟轨道路基地基进行加固。长螺旋钻孔管内泵压混合料成桩过程中,加强施工过程管理,对钻进速度、钻机电流、混合料施工配合比和拔管速度等关键环节进行了有效的控制,减少了故障的发生,保证了桩体质量。
Combined with the practical engineering of Liyao test section of Beijing-Shanghai high-speed railway, CFG piles are used to reinforce the foundation of ballastless track subgrade in order to meet the technical requirements of post-construction settlement of subgrade not more than 15 mm. During the process of pile-compaction of long screw auger, the construction process management is strengthened and the key links such as drilling speed, drilling current, mixture mix ratio and extubation speed are effectively controlled, which reduces the occurrence of faults , To ensure the quality of the pile.