Construction method for earth excavation of deep foundation pit near river

The invention discloses a construction method for earth excavation of a deep foundation pit near a river. The construction method is characterized by comprising the following steps that in the construction process for earth excavation of a deep foundation pit project near the river, mechanical excavation for foundation pit construction and hydraulicking for foundation pit construction are combined according to the actual condition of a foundation pit construction site; hydraulicking is adopted for foundation pit construction when the operating space of a traditional mechanical excavation construction machine is limited or the passing time of an earthwork transport vehicle is limited; and meanwhile, earth is converted into mud during hydraulicking for foundation pit construction, and the mud is directly transported away in a waterway transportation way through a mud ship in the river. Influences on the road traffic around the project are avoided, and the transportation time is not limited. By applying the cons