透水管桩技术研究进展

A review of recent advances in permeable pipe pile

静压桩沉桩过程挤土效应一直困扰工程人员,如何加快沉桩引起的超静孔隙水压力消散是目前的研究热点。透水管桩通过沿桩身增设透水孔,联通土体释放超静孔隙水压力,可加速沉桩过程桩周土固结。透水管桩技术将控制沉桩挤土效应及加速超孔压消散的方法耦合至现有技术产品中,起到既实现控制效果,又提升工程效率并节省工程造价的目的,是结合了桩基和排水固结法的优点、极具潜力的一种主动、高效、资源节约导向的桩基施工与地基处理工法。对透水管桩技术在国内外的研究进展进行分析,总结了透水管桩承载性能、透水性能、透水性能优化等方面的研究成果,简要论述了存在的问题及今后的研究方向。

Soil compaction in the process of pile driving has always plagued engineers. How to speed up the dissipation of excess pore water pressure during the pile driving is the current research focus. The permeable pipe pile, which is featured by series of drainage hole distributed along the pile shaft, can accelerate the dissipation of excess pore water pressure and the soil consolidation. The effect ofreducing the soil compaction and speeding up the dissipation of excess pore water pressure during the pile driving is inherent in the service of permeable pipe pile, which can improve engineering efficiency and save project cost. The technique of permeable pipe pile, combining the advantage of pile foundation and drainage consolidation method, can apply to pile foundation construction and ground treatment with high economic efficiency. In this paper, a review of recent advances in permeable pipe pile is carried out, and the research results of the bearing performance, permeable performance, and drainage hole distribution optimization of permeable pipe pile are summarized. In the end, brief discussion of the existing problems and the future research direction in permeable pipe pile is conducted.