Research On Behavioral Safety Of Metro Construction Team Based On Social Network

With the rapid development of metro construction in various cities in China,the demand for metro construction workers is further increasing.A large number of workers without professional skills training enter the construction field,which makes the construction safety accidents caused by workers' unsafe behaviors happen from time to time.Workers' unsafe behavior control has become an important research topic in the process of metro construction.Based on Behavior Based Safety(BBS),this paper studies unsafe behaviors of construction teams from the perspective of group with social network method.It observes,analyzes,corrects and evaluates unsafe behaviors of construction teams through multi-dimensional behavior recognition technology,human dynamics method and competency theory.The specific research contents are as follows:(1)Research on measurement methods of behavioral safety performance of metro construction teams.Firstly,a knowledge base of unsafe behaviors of metro construction workers including various types of work and construction stages is constructed,which extracted based on the analysis of metro construction related standards,technical schemes and accident cases.Secondly,multi-dimensional behavior identification methods and techniques are adopted to collect the behavior data of construction team members.Finally,put forward behavior safety performance measurement index of construction team to quantitatively describe the safety performance of the construction team,which comprehensive considerate the size of the team and the frequency of unsafe behavior.(2)Research on behavior safety performance law of metro construction team.Firstly,the human dynamics research method is used to analyze the behavioral safety performance of the team.It is found that the time interval distribution of the insecure state of the team has a heavy tail characteristic and obeys the power law distribution.Then,from the perspective of social interaction,the behavior patterns of the team are analyzed.According to the characteristics analysis of the social network structure of the construction teams of each type of work,it is found that the social networks of each team have small world and non-scale characteristics,which further explains the behavioral performance of the team.(3)Research on social network intervention of metro construction team behavior.Firstly,the social network structure characteristics of each construction team are studied.It is found that there are network center nodes and cohesion subgroups in each team.Then,according to the importance of the social network node degree of the team and the similarity of the nodes,the importance of the team members is sorted,and the key personnel of the social network behavior intervention of the team are identified.Finally,the behavioral social network intervention was conducted in the template work group and the shelf work group with frequent unsafe behaviors.Through randomized controlled trials,it was found that the network behavior intervention for key personnel is more effective than the traditional intervention model.At the same time,two types of key personnel were revealed through correlation analysis.(4)Research on the construction of Safety Competency Model of key personnel in metro construction team.Assessing key personnel safety competencies enables more targeted behavioral social network interventions for key personnel.Based on the competency theory,combined with exploratory factor analysis,confirmatory factor analysis and structural equation model,the safety competency model of key personnel in the metro construction team was established.The results show that there are four dimensional factors that have a significant impact on the behavioral safety performance of key personnel,namely safety-related operational qualifications,work attitudes,self-regulation and adaptability,as well as personal traits and tendencies.Social network method is used to explore the behavior safety of construction teams from the perspective of groups in this study.Firstly,the full sample collection of group behavior data of metro workers is realized.Secondly,the unsafe behavior law of construction team is preliminarily explored.Thirdly,the network behavior intervention method for key personnel is proposed.Finally,safety competency model of key personnel is built.The research content of this paper is helpful to understand the construction team behavior mode from the perspective of group,enhance the effect of behavior intervention,and improve the efficiency of organization safety management.