Abstract
The corrosion survey of steel sheet piles at Toyama, Etomo and Yasuki Harbors have been carried out, and the following results were obtained.(1) Corrosion tendencies of steel sheet piles could be roughly divided into the following three types:(a) Corrosion was concentrated only on the flat portion of outward facing steel piles within the range of about 30cm under mean low water level, and their corrosion rates were 0.5 to 1.0mm/yr.(b) In sea water, corrosion rate of the flat portion of outward facing steel piles was greater than that of inward facing steel piles. This tendency was most conspicuous directly under mean low water level, and corrosion rates of the flat portion of convex steel piles were 0.1 to 0.2mm/yr.(c) Corrosion rate of steel sheet piles did almost not depend on their shape and elevation.(2) Since, at structures with steel sheet piles, tie rods had been connected generally with the flat portions of inward facing steel sheet piles, the structures didn't collapse at all even in the case of corrosion of type (a) mentioned above.
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