Layout structure of ballast water tanks of immersed tube tunnel

The utility model discloses a layout structure of ballast water tanks of an immersed tube tunnel. The layout structure comprises the ballast water tanks arranged on pipe section bottom plates; each ballast water tank comprises main frameworks, a top transverse beam, top longitudinal beams and a face plate; 6-7 adjacent ballast water tanks are welded in the pipe section edge pipe rack on each side of each pipe section; opposite face plates of the ballast water tanks welded in the pipe section edge pipe racks are integrated with the side walls on two sides of the pipe section edge pipe racks; any two adjacent ballast water tanks in the pipe section edge pipe racks share one face plate; 4 ballast water tanks symmetric about a pipe section middle pipe rack are welded in the traffic lanes of each pipe section of the immersed tube tunnel. Through the layout structure, the ballasting and adjusting functions of the ballast water tanks can be played better, the mounting and dismounting of the ballast water tanks are simple, the construction period is not delayed, and ballast concrete construction is convenient in the ballast water tank dismounting process so as to save the construction cost.