China Safety Science Journal ›› 2023, Vol. 33 ›› Issue (4): 91-99.doi: 10.16265/j.cnki.issn1003-3033.2023.04.0403

• Safety engineering technology • Previous Articles     Next Articles

Analysis of fall accidents characteristics in building construction based on frequency statistics and χ2-PCC

XU Hu1(), CHEN Yuhang1, HE Jiabin1, YAHIA Halabi1, LONG Danbing1,**(), ZHAO Shixing2   

  1. 1 School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China
    2 Sichuan Provincial Architectural Design and Research Institute Co., Ltd., Chengdu Sichuan 610031, China
  • Received:2022-11-10 Revised:2023-02-08 Online:2023-04-28 Published:2023-10-28
  • Contact: LONG Danbing

Abstract:

In order to investigate the characteristics of falling accidents and their interactive mode, as well as the dominant factors, 746 accident reports published by the Ministry of Housing and Urban-Rural Development of the People's Republic of China and other departments from 2010 to 2020 were collected, from which seven typical accident characteristics and corresponding indicators were concluded, including occurrence time, accident level, direct economic loss, falling height, classification of work at height, protective measures and worker's age. The frequency statistics were used to analyze the falling accident characteristics and rules, and χ2-PCC method was employed to identify the correlation level and the mutual influence degree between each factor. The results show that nearly half of the falling accidents occurred in the level 2 height range and more than half of the workers did not take effective protective measures in the accidents, while falling height, the number of deaths, direct economic losses and protective measures have significant correlations. The correlation coefficient between protective measures and the other three factors are 0.119、0.149 and 0.187, respectively. The correlation coefficient between falling height and the number of deaths is 0.404, and that between direct economic losses and the number of deaths is 0.957, and that between halfway operation and the number of deaths is 0.17. Moreover, some protection blind zones exist at lower heights in construction sites, and the available protective measures have not effectively mitigated the severity of falling accidents. Therefore, it is suggested to strengthen the safety monitoring of operations in dangerous areas, improve the standard of casualty compensation, and pay attention to the inspection and spot check of the performance deterioration of protective equipment after long-term use.

Key words: frequency statistics, χ2-Pearson correlation coefficient (PCC), building construction, fall accidents, work at height, protection measures