Research and Application of Green Construction Technology of Permanent Temporary Combination of Shield Launching and Receiving Shaft

Abstract relying on the main structure project of Guangzhou fangbai intercity Baifang shield shaft, this paper carries out the green construction fine management of the permanent and temporary combined structure at the expanded end of the shield shaft, and makes it use the visualization technology to inverse the positioning of the embedded sleeve of the ring frame beam and the main reinforcement of the side wall, avoiding 1680 welded joints of the reinforcement of the side wall, saving 80 working hours; When erecting the support frame, the concrete waist beam cutting and transporting platform and the side wall steel formwork tripod platform are designed and constructed together to reduce the repeated erection of the support frame by 832.5t, and the cumulative maximum settlement of the steel platform for cutting and transporting the waist beam concrete is ‐8mm, which does not exceed the warning value; The triangular frame of steel formwork and the split bolt support system of formwork replace the full hall support frame, optimize the amount of plate buckle frame 1432.5t, save 438.10t of steel pipe and 972.6m 2 of wood formwork, reduce the investment of operators by nearly 30%, and shorten the construction period by 15 days.