鄂东长江大桥钻孔灌注桩水下混凝土施工技术

Construction technology of underwater concrete in bored pile of Eastern Long River Bridge in Hubei

以湖北鄂东长江公路大桥南索塔主6号墩钻孔灌注桩水下混凝土施工为例,论述了埋设超声波检测管、下导管、二次清孔、混凝土制作及浇筑等工序,并对施工中堵管、断桩和接桩事故提出了预防和处理措施。只要严格按照有关规范要求,加强施工质量管理与控制,能够使钻孔灌注桩合格率达到100%。

Based on underwater concrete construction of bored pile of No.6 Pier in South tower of Eastern Long River Highway Bridge in Hubei, the paper introduces laiding ultrasonic testing tube,descending pipe ,clearing hole up in second time,mixing concrete,and pouring concrete, and proposes prevention and treatment measures of underwater concrete pouring pile accidents such as blocked pipe, cut pile and long pile. As long as strictly comply with the relevant regulatory requirements, and strengthen the management and control of construction quality, the passing rate of bored piles could be 100%.