Layered and fast construction method for foundation pit bottom plate

The invention relates to a layered and fast construction method for a foundation pit bottom plate and belongs to the technical field of building operations. The method is used for solving the problems that a traditional foundation pit bottom plate partitioned construction technology is low in speed and large in construction difficulty, and a foundation pit bottom plate is not ideal in waterproof effect. According to the layered and fast construction method for the foundation pit bottom plate, the foundation pit bottom plate is cast in two layers, the lower layer is cast in a partitioned manner, and the upper layer is overall cast; firstly, after a foundation pit is excavated in a partitioned manner, the lower casting layer is cast in a partitioned manner, and the lower casting layer is fixedly connected with an uplift pile; and then, after the lower casting layer is cast in the portioned manner and maintained for a period of time, the upper integral casting layer is integrally cast and maintained. According t