Abstract:Xinghua Road Undercrossing Rainwater Pumping Station Project is located in Xinzhou District, Wuhan City. The depth of the pump station is deep. In order to select the appropriate construction scheme, in the early stage of design, the detailed scheme design is made for the two common construction technologies of rainwater pumping station, namely excavation cast-in-place method and open caisson method. The comparative analysis is carried out in the aspects of construction difficulty, construction period, influence on the surrounding environment and engineering cost. The results show that the advantages of the open caisson method are the low comprehensive cost, low risk, but long construction period compared with the excavation cast-in-place method. it can be preferred under the premise that the construction period is not a controlling factor. In the construction of open caisson in soft soil area, it is necessary to fully consider all kinds of problems that may occur in the sinking process of open caisson in the design stage, and the adequate measures are taken to reduce the risk and ensure the smooth implementation of open caisson.
