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In order to systematically analyze the behavioral safety risks of contractors in oil and gas pipeline projects and improve the scientificity and standardization of risk assessment work, a contractor behavioral safety risk assessment model was constructed based on the concept of full life cycle management, integrating the three key elements of the safety management system, behavior and status. The weights of indicators at all levels were determined by the analytic hierarchy process (AHP), and a quantitative scoring mechanism was established. The model was verified by cases such as the Yixian sub-transmission station, the Beijing branch water conservation project, and the Linxian operation area sewage treatment system replacement project. The results show that typical problems in the stages of business selection and pre-entry preparation, project construction, project end and completion include incomplete construction plans, unclear personnel responsibilities, missing safety supervision records, and low training coverage. The assessment model can identify and classify different types of risks and clarify their distribution characteristics throughout the life cycle. The behavioral safety risks of oil and gas pipeline contractors have different manifestations at different stages. There is a significant correlation between organizational behavior and management status, and risks are prone to concentrate on the weak links of stage connection and management chain.
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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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