Corrosion prevention method of steel pipe and steel pipe pile and steel pipe sheet pile

摘要

PROBLEM TO BE SOLVED: To provide a corrosion protection method that can obtain sufficient anticorrosive effect on a steel pipe at least partially embedded in soil, without affecting the surrounding facilities.SOLUTION: A corrosion protection method of a steel pipe is a corrosion protection method of a steel pipe such as a steel pipe pile 1 whose upper end opening 1a is opened upward and whose lower end opening 1b is at least partially embedded in soil 2 so as to be located in the soil 2. A part of the steel pipe pile 1 embedded in the soil 2 has through holes 1c, penetrating the steel pipe pile 1 in the pipe thickness direction, at positions higher than the surface of the soil 2 in the steel pipe pile 1, and a water absorbing material 4 is placed in the steel pipe pile 1. The water absorbing material 4 placed in the steel pipe pile 1 absorbs water in the soil 2 around the steel pipe pile 1 via the through holes 1c to reduce the water content in the soil 2 around the steel pipe pile 1. The water absorbing material 4 can be charged from the upper end opening 1a after a part of the steel pipe pile 1 is embedded in the soil 2.SELECTED DRAWING: Figure 5