海洋环境下混凝土桩基耐久性影响因素研究

Study on Influencing Factors of Durability of Concrete Pile Foundation in Marine Environment

通过比较环境和材料等因素的影响,研究海洋环境中桩基混凝土的耐久性变化规律,结果表明,各因素对桩基耐久寿命的影响显著性不同,且它们之间具有耦合效应。基于氯离子的扩散方程,文中提出环境和材料耦合效应下的氯离子扩散模型,通过工程实测数据,验证模型的合理性。基于该耦合模型,预测了科特迪瓦阿比让四桥的使用寿命,与设计相符合。

In this paper,the durability change law of pile foundation concrete in marine environment is studied by comparing the influence of environment and material.The results show that the influence of various factors with coupling effect on each other on the durability life of pile foundation is significantly different.Based on the diffusion equation of chloride ion,a chloride diffusion model under the coupling effect of environment and material is proposed.The rationality of the model is verified by the measured data.Based on the coupling model,the service life of the fourth bridge in Abidjan,Ivory Coast,is predicted,which is in accordance with the design.