硅酸盐学报Issue(4)：476-485,10.DOI:10.7521/j.issn.0454-5648.2014.04.10
海工环境PHC管桩设计寿命计算
Calculations of Designed Lifetime of PHC Pipe Piles in Marine Environment
摘要
Abstract
Chloride-induced reinforcement corrosion is one of the main factors affecting the durability of concrete.This paper obtained the analytical solution of chloride ions diffusion of prestress high concrete (PHC) pipe piles in cylindrical coordinates under different diffusion coefficient conditions based on the Fick second law.In normal environment (i.e.,temperature differ-ence between 0-1 5 ℃),the difference between inside and outside diffusion coefficients is generally 2 times.Considering the special process of PHC pipe piles,we used the electric flux to calculate the diffusion coefficients.The calculated results show that centrifugal stratified and temperature both have a major influence on the chloride ions diffusion,and initial chloride content has less influence.The calculated results are effective with respect to the reinforced block effect.The half a wall thickness was used as a diffusion depth to calculate the design life of PHC pipe piles.It is suggested that the wall chickness should be greater than 100 mm and the mortar layer should not be greater than 10 mm if the service life of PHC pipe piles is > 50 years in marine envrionment.The wall chickness of 150 mm should be used and the mortar layer should be less than 30 mm if the service life is> 100 years.关键词
PHC管桩/氯离子扩散/有限差分法/设计寿命Key words
PHC pipe piles/chloride diffusion/finite difference method/design life分类
建筑与水利引用本文复制引用
李镜培,岳著文,邵伟,杨博,吕韬..海工环境PHC管桩设计寿命计算[J].硅酸盐学报,2014,(4):476-485,10.基金项目
国家自然科学基金项目(51178341)资助项目。 （51178341）
