布袋注浆桩在深厚层夹层软基处理中的应用

Application of Bag-grouting Pile in Reinforcing the Deep Intercalation Soft Soil Foundation

研究目的:有效处理甬台温铁路大量分布深厚层夹层软土地基,对控制投资和满足高标准铁路路基的稳定和工后沉降控制要求是至关重要的。通过本研究,拟找到一种技术可行、经济合理的地基加固措施。研究结论:布袋注浆桩(简称布袋桩)是分层注浆技术和土工织物综合应用而成的新技术,与周边土体一道形成复合地基,提高地基土刚度和承载力,具有流水作业、无污染和浆材利用率高等特点,加固深厚层夹层软土地基是可行的。

Research purposes： Effective treating the deep intercalation soft soil foundation of YongTaiWen Railway is very important to the investment control and satisfying the requirements of high standard railway subgrade for stability and control of the post - construction settlement, so the study is done on seeking a foundation reinforcement technique which is feasible in technology and rational in the cost. Research conclusions：Bag - grouting pile is a new technique integrating stratified grouting technique with geo textile and it can be used for forming composite foundation along with the soil around to improve the rigidity and the bearing capacity of subgrade soil with the features of continuous process, non - contamination and high availability of materials, so it can be used to reinforce the deep intercalation soft soil foundation.