布袋注浆桩在临近既有线路基工程中运用及其承载力计算的思考

布袋注浆桩是近年来广泛用于铁路工程的软基处理的桩型。某临近既有运营线周边受环境因素施工布袋桩,结合场地条件和地层条件,通过布袋桩试桩和现场的多参数对比研究,获得布袋桩适合本场地的施工参数,并运用成功。结合本工程,笔者研究下发现借用CFG桩复合地基公式进行布袋桩的设计存在一定的不合理,通过分析,提出自己对设计的改进型公式。同时该桩型使用还不广泛,笔者建议加强对其承载力及其沉降计算模式研究。

Aplication research and thinking of bearing capacity on the big-grouting pile in softing foundation treatment of railway

Big-grouting pile is widely used in softing foundation treatment of railway.In an casing, a lot of research about bearing capacity on the Big-Grouting Pile is progressing, and compare with some parameters in the process of construction, the parametersfit for the layer be found and used.Combined with this project, Research and Thinking of bearing capacity on the Big- Grouting Pile display the Calculation formula of CFG is unsuited for the Big-Grouting Pile.