As a new type of building material, Larsen steel sheet piles are used as retaining walls for soil, water and sand when building bridges, cofferdams, laying large pipelines, and excavating temporary ditches; It plays an important role in engineering as retaining wall, retaining wall, dike revetment, etc. in wharf and unloading yard. Larsen steel sheet pile as cofferdam is not only green and environmentally friendly, but also has fast construction speed, low construction cost and good waterproof function