既有线悬臂式挡土墙悬喷桩基坑支护技术

Foundation Pit Support Technology of Cantilever Retaining Walls Suspension Injection Pile of the Existing Railway

本文依托北京动车段走行线悬臂式挡土墙基坑支护工程,介绍了旋喷桩用作既有线施工防护的安全性与经济性,根据地质情况对施工参数的适当调整,可以大大节约工期,降低成本。为以后类似施工提供一种思路、方法。

Relying on the foundation pit support project of cantilever retaining walls of Beijing EMU line,this paper introduced the safety and economy of jet grouting piles used for the construction protection of existing lines,made appropriate adjustments of the construction parameters according to the geological conditions,which can significantly save the construction period and reduce costs,and can provide an idea and method for future similar construction.