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To manage risk transmission and reduce the probability of construction safety accidents, the evolution process and characteristics of construction safety risk transmission in high-altitude areas were explored. Firstly, based on construction accident reports of hydropower projects in high-altitude areas and the 4M1E theory, a construction safety risk factor system was constructed from five aspects: personnel, machinery and equipment, materials, management, technology, and environment. The Decision-Making Experiment and Assessment Technique (DEMATEL) was used to analyze risk events triggered by risk factors. Then, based on the SFEP theory, a construction safety risk transmission network was established, and the risk transmission probability of each path was calculated through association rules. The SD method was utilized to construct an SD model of the construction safety risk transmission network. Finally, a large hydropower project in Xizang was taken as an example for simulation verification. The results show that the SD model of the construction safety risk transmission network reveals 29 risk transmission paths from 17 edge events, 15 process events, to 5 final events, as well as their evolution trends and sensitivities. Environmental and management risk events are identified as key nodes, and three key transmission paths are identified. Based on this, targeted risk transmission prevention and control measures are proposed, providing a theoretical basis for the management of construction safety risks in hydropower projects in high-altitude areas.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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