## 4 Engineering Example Calculation
### TOPSIS Method for Construction Quality Evaluation
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Construction Phase** & \(S_{i}^{+}\)**Value** & \(S_{i}^{-}\)**Value** & \(G_{i}\)**Value** & **Evaluation Results** \\ \hline The whole bridge construction process & 18.7287 & 13.0855 & 0.4113 & Level IV \\ Bored pile construction & 32.4748 & 26.0381 & 0.4450 & Level IV \\ Cofferdam construction & 23.1976 & 19.2715 & 0.4538 & Level IV \\ Bridge pier construction & 11.5904 & 13.6852 & 0.5414 & Level IV \\ Superstructure construction & 22.7985 & 18.8179 & 0.4522 & Level IV \\ Ancillary works construction & 13.8277 & 10.6298 & 0.4346 & Level IV \\ \hline \hline \end{tabular}
\end{table} 
Table 17: Each construction process \(S_{i}^{+}\), \(S_{i}^{-}\), \(G_{i}\) calculation and evaluation results. leading edge of the guide beam), and \(B_{13}\) (excessive deflection of the leading edge of the cantilever (after the removal of the guide beam)) are larger in proportion to their influence on the quality of the construction of the bridge. In the literature [29], it is stated that pile axis deflection has a significant impact on the construction risk of bored piles. The literature [36] obtained the conclusion that main girder overturning and downward deflection have a large impact on the construction risk of bridge jacking after a series of studies. The literature [37] concluded that the construction process with the highest construction importance is the jacking construction process after analyzing the construction risk of steel-concrete composite girder bridges. This is basically consistent with the results analyzed in this paper, indicating that the CWM-TOPSIS theory proposed in this paper is more accurate in assigning weights to the index factors. The results of the construction quality evaluation serve as a reference and reference for construction quality management. The quality management of engineering projects can be started from the following aspects:  
1. Personnel quality management: to improve the overall quality of the project through the management of all personnel involved in the project. The construction of the project involves a large number of personnel and complex roles, which requires the establishment of a sound personnel quality management system, which generally adopts the methods of training, publicity, supervision, and assessment to make the personnel firmly establish quality awareness;
2. Raw material quality management: the quality management of raw materials is the basis of the quality management of the entire construction project. In construction, it is necessary to strictly establish a standardized and scientific raw material procurement system. At the same time, as should be clear for the construction materials management responsibilities, establish and improve the material test management and material inspection system. Ensure that all materials put into construction meet the specifications of the material quality requirements. Avoid the impact of unqualified materials on project quality from the source;
3. Mechanical equipment quality management: indicators mainly include the following: whether the choice of equipment type meets the construction requirements, whether the mechanical equipment is regularly supervised and inspected, whether the use of mechanical equipment log is perfect, and whether the operator of each piece of machinery and equipment is responsible for the operation of the person and whether the requirements are clear. By controlling the above indicators, we can avoid the impact on the construction of the project caused by the age of the mechanical equipment and the errors in the process of installation, use and dismantling;
4. Quality management of construction methods: before construction, each construction stage should be split and refined according to the construction drawings, and the construction technology that meets the actual project should be selected according to local conditions.