# Construction and Application of Safety Management Scenarios at Construction Sites
## 3 Results
### Analysis of Safety Management Scenario Elements in the Second Phase of Main Structure Construction  
4.1 Construction Progress of the Second Phase of the Main Structure Construction of the Production Base Project  
During the autumn construction period, an aerial photo of the second stage of the production base project's main structural construction (Figure 11) revealed the completion of the main structures for Building Nos. 4 and 5, a 40% completion of Building No. 3's main structure, a 90% completion of Building No. 1's comprehensive service structure, and a completed main structure for Building No. 2's comprehensive service structure. In general, the bulk of the construction site is in the principal structure construction phase. Therefore, while building the site model, it must be constructed on the basis of the completed construction situation mentioned earlier. The parameters of the simulation are set according to the autumn climatic conditions specified in Table 2.  
4.2 Analysis of Natural Conditions for the Construction of the Second Stage Scenario of the Main Structure Construction of the Production Base Project  
Owing to delayed progress in the primary construction site of Plant 3, the wind flow in the XY direction at the site's 19.4 m range did not involve the aforementioned Plant 3 structure (Figure 12). During the autumn season, northwest winds dominate  
Figure 11: Aerial photo of the site during the main structure construction Stage II. Figure 10: Mechanical buffer (**a**) and Material buffer (**b**) for the first phase of the main structure construction. the construction site. As the wind advances toward the north of Plant Nos. 4 and 5, it encounters obstructions. This phenomenon generates an air flow bypass, with some of the air flow passing to the west of Building No. 5 and to the east of Building No. 4, while the other part passes through the middle of the road, en route to Plant Nos. 4 and 5. Clear causal connections between statements help ensure a logical flow of information in the text. At present, the construction site is undergoing a simulation of the highest average wind speed during the autumn. The road located between Plant Nos. 4 and 5, as well as the road in the middle of Building Nos. 1 and 2, are also affected by this simulation. The fifth plant is situated in a region with higher wind speed; it is positioned at a corner and experiences a maximum wind speed of over 5 m/s. Ancillary services of Building Nos. 1 and 2 are adjacent to the road with wind speed, which is next to Plant No. 3. Owing to the main structure's relatively low height, the wind speed between Plant Nos. 2 and 4 is faster. The wind speed in the immediate vicinity is greater. However, the southern portion of Plant No. 4, the southern and eastern sections of Building No. 2, and the area between the main building and the podium building experience reduced wind speeds due to being located in the wind shadow. 4.3 Analysis of Artificial Conditions for the Construction of Second-Stage Scenarios for the Main Structure of a Production Base Project  
(1) Analysis of machinery arrangement for the second stage of main structure construction  
In the second stage of the main structure construction, the construction sites of the five buildings are in the main construction stage, and the construction sites of the five tower cranes are put into use. Owing to delays in the construction period caused by the survey of Plant No. 3's cultural relics, the project department used Truck Crane No. 2 to work with the tower crane at this stage to speed up the process of construction while ensuring safety. Figure 13a illustrates the buffer zone set up for the mechanical arrangement of the second phase of main structure construction. In this construction phase, a secondary buffer zone is set up in the cross-operation area of Automobile Crane No. 2 and Tower Crane Nos. 2 and 3, where multiple cross-operations occur. The danger is also high, thereby requiring a focus on control.