旋流沉淀池沉井法施工排水取土下沉方法

超深、大直径地下筒体结构沉井法施工，采用排水取土下沉、干封底的方法施工；沉井内的分层挖土，土方挖运采用机械配合人工的方法，均匀、对称取土，防止沉井在取土下沉中不均匀下沉、突沉等问题，沉井偏位后采取井外卸载、井内偏心取土等纠偏措施。

Construction Technology on Drainage Sand Sinking Method for Rotational Flow Pond

Super deep underground structure, large diameter cylinder caisson method construc- tion, the drainage excavation subsidence, anhydrous sealing method construction; sunk well stratified excavation of earthwork, using machinery with manual, uniform, symmetric sampling, prevent soil sinking caisson in the uneven settlement, the problem such as sudden sinking, sinking position devia- tion after taking in the well to load and in well digging and other eccentric deviation correction meas- ures.