深基坑炮锤击入钢管土钉墙支护施工技术

On support construction technique for hammer penetration steel pipe nailing wall support of deep foundation pits

深基坑土钉墙支护施工时,因击入钢管长度过长容易造成弯曲,从而影响支护体强度及稳定性。在综合分析支护体构造及施工成本的基础上,提出了深基坑炮锤击入钢管土钉墙支护施工技术,摆脱常规支护的构造形式,提高了施工功效,并对其工作原理、施工工艺流程、关键技术特点进行了深入研究。

The paper indicates the penetrated steel pipes can be easily bent,which will affect the support strength and stability,in the nailing wall support construction of the deep foundation pits,analyzes the support components and construction cost,points out the construction technique of the hammer penetration steel pipe nailing wall support of the deep foundation pits to cast off the component forms of the regular support,so as to improve the construction efficiency,and researches its working principle,construction craft procedure,and key technical features.