复合土钉支护的作用机理与施工——以南京火车站北广场基坑为例

Mechanism and construction of the compound soil nailing support taking the north square foundation pit of Nanjing railway station as the case

复合土钉墙是发展前景相当好的技术,近年在深基坑支护中已开始逐步应用。文章以南京火车站北广场基坑开挖支护为例,阐述了在复杂工程地质情况下选择复合土钉支护方案的作用机理与施工措施,并通过监测适时掌握基坑开挖中支护结构的动态变化,及时采取处理措施,做到防患于未然。

The composite soil nailing wall technology has developed well in recent years, and has gradually been applied in deep foundation pit supporting. Taking the north square excavation support of Nanjing railway station as an example, this paper expounds the mechanism of the composite soil nailing support scheme and construction measures in complex engineering geological conditions, and the dynamic changes of the supporting structure in foundation pit excavation through monitoring. Timely measures are taken to nip it in the bud.