# Construction and Application of Safety Management Scenarios at Construction Sites
## 3 Results
### Basic Overview of the Production Base Project
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Truck Crane** & **Truck Crane** & **Factory Owners** & **Rated Lifting** & **Truck Crane** \\
**Numbers** & **Models** & **Factory Owners** & **Capacity** & **Boom Length** \\ \hline \multirow{4}{*}{1\#} & \multirow{4}{*}{XZJ5507 JQZ80} & Xuzhou & \multirow{4}{*}{80 t} & \multirow{4}{*}{47.5 m} \\  & & Construction & & \\  & & Machinery & & \\  & & Group Limited & & \\  & & \multicolumn{2}{c}{Sany} & \\
2\# & \multirow{2}{*}{STC250T4} & Automobile & \multirow{2}{*}{25 t} & \multirow{2}{*}{35 m} \\  & & Company & & \\  & & Limited & & \\  & & Xuzhou & & \\
3\# & XZJ5331 JQZ25K & Construction & \multirow{2}{*}{25 t} & \multirow{2}{*}{39 m} \\  & & Machinery & & \\  & & Group Limited & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Basic situation of construction site truck cranes. (2) Analysis of material staging during the foundation and basement construction phases  
The majority of the designated material storage areas on the production base construction site are located along the eastern road of Plant No. 5, the northern road of Plant No. 3, and the northern road of Building No. 1. As required by construction demands, the site's material storage areas primarily consist of a reinforcement bar raw material zone, a reinforcement bar semi-finished product processing zone, a reinforcement bar finished product storage zone, a floor slab processing area, a carpentry processing area, and a curtain wall stacking area. According to the regulations set out in GB50348-2012 for Safety at Construction Sites, the following safety management requirements are necessary for different kinds of materials at construction sites: (1) the rebar must be stacked neatly with a maximum height of 1 m, cushioned with wooden squares, and kept away from rainwater; (2) bricks and blocks must be stacked on pallets with a maximum height of 1 m. Square piles must be stacked at least 5 m away from the trench edge to prevent collapse. Gravel materials must be stacked in piles, with a maximum height of 1.5 m, depending on gravel diameter. Templates must be stacked according to their specifications. To prevent collapse, piles of gravel materials should not exceed a height of 0.5 m. Furthermore, the gravel materials must be sorted according to their diameter. Templates must also be sorted according to their specifications and stacked with an anti-tipping mechanism, ensuring that their height does not exceed 1.5 m.  
The vicinity where material stacking occurs is designated as a secondary buffer zone. In this area, non-compliant stacking may transpire, leading to unstable and excessively high stacking, which can cause pile collapses and pose a high safety accident risk. The first-level buffer zone is established within a 3 m radius outside of the material stacking area. This area presents a danger to individuals due to the lack of windproof measures for the materials. The material buffer zones for various construction stages must adhere to the maximum height requirement for material stacking, as specified above. Material stacking areas that fall considerably below these specifications are not considered in this study. During the foundation and basement construction stages, the material stacking areas were mainly concentrated on the east side of Plant No. 5, the north side of Plant No. 3, and the north side of Building No. 1. However, given that the foundation construction work only started in Plant No. 3 at this stage, the height of rebar stacked on the north side of Plant No. 3 was much lower than 1 m. Therefore, when setting up the buffer area for material stacking at this stage of construction (Figure 7b), three material stacking areas  
Figure 7: Mechanical buffers (**a**) and Material buffers (**b**) for foundation and basement construction phases. were set up for Nos. 1, 2 and 3, and the material stacking area on the north side of Building No. 3 was not studied.