Author(s): Xiaoqing He; Yonglai Zheng; Wei Shao; Wei Lin

Linked Author(s):

Keywords: Marine engineering; Chloride corrosion; Reinforced concrete piles; Critical corrosion depth; Sustainable development

Abstract: The durability study of marine engineering structures is an important part of promoting the sustainable development of water engineering, which can help green energy use and ecological protection. Reinforced concrete piles are subjected to the marine environment for long term service, in addition to wind, waves, currents, etc., they are also subjected to long term exposure to severe chloride ion erosion bad conditions. In this paper, a critical corrosion depth prediction model for chloride ion erosion of RC pipe piles is proposed. Based on Fick's second law, the chloride ion diffusion equation is established, and the chloride ion diffusion equation is corrected by considering the factors of temperature, humidity and concrete aging, and the analytical solution is calculated. Based on the time-varying chloride ion law and the thick-walled circular cylinder model, the corrosion initiation time and critical corrosion depth of pipe piles under different corrosion modes are predicted to evaluate the durability of pipe piles in marine environments, and the sensitivity analyses of the factors affecting the durability of pipe piles are carried out. It is concluded that the maximum corrosion depth and the predicted service life of tubular piles obtained from the uniform corrosion model are much smaller than those obtained from the pitting corrosion model. The uniform corrosion assumption for assessing the durability of tubular piles greatly underestimates the number of years that reinforced concrete tubular piles can resist corrosion. Finally, optimisation strategies are proposed for durability research and sustainable development of marine engineering structures to improve performance, enhance disaster resistance and promote environmentally friendly water engineering in the context of engineering practice.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P2076-cd

Year: 2025