微型花管桩在覆盖层治理中的应用与分析

Application and analysis of micro pipe pile in overburden layer treatment

本文针对覆盖层基础加固,运用微型花管桩对土体灌浆形成的帷幕墙对隧道地基进行加固,由注浆花管和注浆固结后的土体形成复合基础共同承担隧道墙脚传来的荷载,改变隧道地基地层承载力较低的性能,提高隧道墙脚底部及仰拱与微型桩及帷幕墙共同承载和变形协调的能力,为今后类似工程提供了经验。

According to the foundation strengthen of the overburden layer,the curtain wall,which formed by the soil grouting through the micro pipe pile,is used to strengthen the tunnel foundation.The composite foundation which is composed of grouting pipe and consolidation soil undertake the loads come from the wall foot of tunnel,which could change the lower performance for the formation carrying capacity of the tunnel foundation,improve the capacities of the bearing and deformation coordination for the wall foot bottom and invert for the tunnel and the micro pile and the curtain wall.These experiences would be provided for the similar project.