中文摘要：

施工人员的违规操作行为会致使工程项目事故发生，直接威胁生命财产安全和影响工程项目成败。在研究工程项目施工事故产生机理和施工人员违规操作行为扩散机理的基础上，运用运筹学方法分析违规操作行为在施工人员网络中的传播扩散过程，研究表明：自身阈值、影响系数和显现程度对施工人员违规操作行为的传播扩散具有不同的调节作用，合理调整自身阈值、影响系数、显现程度与影响节点和传播路径数量变化的作用关系，可以有效减轻违规操作行为的传播扩散程度，相关结论可以在一定程度上帮助防控和减少工程项目施工中突发事故的发生。

英文摘要：

The illegal operations of construction workers can cause the engineering accidence which may threaten the safety of life and property and influence the project success. This paper uses operations research method to analyze the diffusion of the illegal operations in construction network based on the analysis of the mechanism of construction accident occurrence and the mechanism of the illegal operations diffusion. The results show that the self-threshold value, influence coefficient and apparent degree have different regulating effects on the diffusion of the illegal operations, and hy adjusting the relationship between the relevant parameters of the self-threshold value, influence coefficient and apparent degree and the number of influencing node and propagation path, the diffusion of the illegal operations can be alleviated. The conclusions can effectively prevent, control and reduce the occurrence of sudden accidents in construction projects to some extent.