模拟腐蚀层扰动的硫酸腐蚀环境对 6 组混凝土圆柱体试件进行了加速腐蚀试验，采用三维激光扫描法和传统的游标卡尺法分别对试件的硫酸腐蚀深度进行测量． 以最小二乘圆柱法构造目标函数，利用 Matlab 软件对三维激光扫描法获得的数据进行处理，求得每个被测点的腐蚀深度，对腐蚀深度进行统计分析，发现其服从正态分布，统计参数均值和标准差均随腐蚀时间近似线性增大，腐蚀深度可表示为高斯随机过程． 与三维激光扫描法结果相比，游标卡尺法所得腐蚀深度的均值略小，标准差则明显偏小． 由于三维激光扫描法获得的数据量是游标卡尺法的数万倍，因此基于三维激光扫描法的混凝土腐蚀深度随机过程模型在进行腐蚀深度预测时具有更好的可信性．

Firstly,an accelerated corrosion test was conducted with 6 groups of concrete cylinder specimens to simu- late the sulfuric acid corrosion environment with interrupted corrosion layer.Secondly,the corrosion depths of cor- roded specimens were measured by using a three-dimension (3D) laser scanner and a vernier caliper,respectively.Then,an objective function was proposed with the help of least square cylinder,and the 3D point coordinates ob- tained with 3D laser scanner were treated with Matlab to calculate the corrosion depth of each point on cylinder sur- face.Finally,the corrosion depth was statistically analyzed.The results indicate that the corrosion depth can be ex- pressed as a Gaussian random process with normal distribution; and that both mean value and standard deviation of the depth approximately increase with corrosion time in a linear way.Moreover,it is found that the mean corrosion depth measured with vernier caliper is slightly less than that obtained with 3D laser scanner,while the correspond- ing standard deviation measured with vernier caliper is obviously less than that obtained with 3D laser scanner.As the amount of data obtained with 3D laser scanner is tens of thousands of times as such as that obtained with vernier caliper,it is more reliable to calculate corrosion depth with Gaussian random process model.