Study on safety monitoring model of crack opening displacement for high-pile wharf

Safety monitoring is an important measure for the safe operation of water conservancy projects. The monitoring model plays an important role in monitoring data analysis, widely used in reservoirs and dams. However, relevant theories and studies are rarely applied in port terminals. Since high-pile wharves are different from reservoirs or dams in working environment and working behaviour, it is necessary to develop a monitoring model for high-pile wharves considering the working characteristics. In this paper, it was proposed that principal effect factors of crack opening displacement of high-pile wharves were temperature component, wind component, heap load component, and time effect, according to the change law of dependent and independent variables. The expressions of these factors were given. On the basis of it, the statistical model and Least Squares Support Vector Machine (LS-SVM) model of crack opening displacement (COD) was established respectively. The evaluation method for these models was developed. Models were used in fitting and prediction with data series of COD of a high-pile wharf to verify the effectiveness and reasonableness. The results showed that the proposed models with high precision and certain prediction ability can provide scientific principles for data analysis and safety monitoring of high-pile wharves.