Steel sheet pile protection system for tidal range area and water level fluctuation area and construction method thereof

The invention discloses a steel sheet pile protection system for a tidal range area and a water level fluctuation area. The system comprises a protective deck, a certain distance is reserved between the protective deck and the outer surface of a steel sheet pile, multiple mounting holes are formed in the protective deck, bolts penetrate through the mounting holes, an inner positioning nut and an outer positioning nut are in threaded connection with the portions, located on the inner side and the outer side of each mounting hole, of each bolt, the outer surface, corresponding to each mounting hole, of the steel sheet pile is welded to a fixing nut, and the bolts are in threaded connection with the corresponding fixing nuts, so that a filling cavity capable of being filled with anti-corrosion filling materials is formed between the deck surface of the protective deck and the outer surface of the steel sheet pile, the bottom and the side edges of the filling cavity capable of being filled with the anti-corrosion filling materials are sealed by sealing materials, the filling cavity capable of being filled with the anti-corrosion filling materials is filled with the anti-corrosion filling materials, and the solidified anti-corrosion filling materials and the protective deck together constitute the whole steel sheet pile protection system. According to the steel sheet pile protection system for the tidal range area and the water level fluctuation area, anti-corrosion methods of adopting a coating or uniting the coating with a sacrificial anode or adopting impressed current protection and the like are adopted in an underwater area, and the comprehensive protection of the steel sheet pile can be achieved.