Build steel sheet piling cofferdam structure of exposing under water on basement rock

The utility model discloses a build steel sheet piling cofferdam structure of exposing under water on basement rock. This structure steel sheet piling cofferdam lies in between the both sides of river bank, and the multiunit owner cofferdam grid that comprises steel sheet pile combination constitutes with the continuity of vice cofferdam grid interval, packs the grit in main cofferdam grid and the vice cofferdam grid, and steel sheet piling cofferdam bottom riverbed has the manual work to jettisoning the back -up sand to form the basic overburden that is used for the steel sheet pile location, and main, vice cofferdam grid is by constituting through the hasp structural connection. The utility model discloses the structure does not need surface of water drilling to build the mounting groove, has reduced construction cost effectively, has shortened engineering construction cycle, has improved work efficiency, forming the basic overburden that is used for the steel sheet pile location through the back -up sand of jettisoninging, forming under water the construction environment that has the overburden on the naked batholithite, beat the steel sheet pile and fold the cofferdam construction and accomplish the steel sheet piling cofferdam construction through inserting again, steel sheet pile installation location is accurate and the construction technology degree of difficulty is little, has reduced the facility request, has realized the cofferdam construction of high -efficient high grade.