EARTHQUAKE RESISTANT REINFORCING STRUCTURE FOR GRAVITY TYPE HARBOR STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a rational earthquake resistant reinforcing structure having a wave dissipating function in addition to earthquake resistant reinforcing effect, further coping with large ships and reducing cost. SOLUTION: A landing bridge 2 is constructed on the front face side of a caisson 1 serving as an existing revetment. Steel sheet piles 3, 3' are driven between piles 5' of an off shore side pile row of the landing bridge 2 so as to construct an earth retaining wall 4 together with the piles 5. Filling material 6 is charged between the earth retaining wall 4 and the caisson 1. A top end 7 of the filling material 6 is positioned in an underwater part (c), and the steel sheet piles 3, 3' different in length are used for the earth retaining wall 4 so as to form a slit-like water flow part 8 in the earth retaining wall 4. A retarding part 9 is formed at an upper part from the top end 7 of the filling material 6 so as to provide a structure with wave dissipating function in addition to earthquake resistant reinforcing effect.