混凝土栈桥与支撑相结合的深基坑开挖技术

天津双子塔项目属于深大基坑,采用“二墙合一”地下连续墙结合混凝土支撑的围护形式.根据工程支撑的特点与现场实际情况,采用了栈桥出土与混凝土支撑相结合的基坑开挖措施,应用结果表明,该方案在保证基坑开挖过程安全的前提下,加快了基坑开挖出土的效率,达到了安全和工期目标.

Concrete Trestle and Support Combined Excavation Technology for Deep Foundation Pit

Abstract： The Twin Towers Project in Tianjing belongs to deep and large foundation pit engineering and the ＂one wall acting as two＂ underground diaphragm wall combined with concrete support were used as excavation support. According to the engineering support features and the actual construction site conditions, the trestle bridge unearthing combined with the concrete support were adopted as the foundation pit excavation measures which showed that on the premise of ensuring the safe excavation, such application can not only speed up the efficiency of the foundation pit excavation, but also achieve the target of the safe construction and its time limit.