嘉兴污水处理工程高位井施工

Construction of Header Tank in Jiaxing Sewage Treatment Works

嘉兴污水处理工程高位井井体分5节制作,采用水力机械挖土分3次排水下沉法施工。由于采用了大口径井点降水,实现了排水下沉深度达29.35m,创上海地区软土层中沉井排水下沉深度的记录。文章叙述了沉井制作、下沉的全过程。其施工技术可供类似工程参考。

The header tank for the sewage treatment works in Jiaxing is fabricated in 5 sections, sunk through hydraulic mechanic excavation and draining three times. As large diameter well point dewatering is adopted, the depth for drained sinking is down to 29.35 m, breaking the record of drained caisson sinking depth in the soft ground of Shanghai. Described hereby is the whole process of caisson fabrication and sinking.