一、引言黄浦江上游引水工程是旨在改善上海城市用水水质的大型市政设施。其中,在杨树浦水厂和南市水厂各有一条直径3米的输水钢管穿越黄浦江底(图1),是整个工程中输水系统的咽喉。这些过江钢管是焊接连接的A_3钢板卷管,均用沉井顶管施工敷设,它们的概况如下: I. INTRODUCTION The water diversion project in the upper reaches of the Huangpu River is a large-scale municipal facility designed to improve the water quality of Shanghai’s urban areas. Among them, Yangpupu Waterworks and Nanshi Waterworks each have a diameter of 3 meters of steel pipe across the Huangpu River (Figure 1), is the throat of the water system throughout the project. These over-the-river steel pipe is welded connection A_3 steel coil, are laid with caisson pipe jacking, they are summarized as follows: