Construction risk assessment of deep foundation pit in metro station based on G-COWA method

2018 2nd International Workshop on Renewable Energy and Development

能源学;经济学

You, Weibao^1 ; Wang, Jianbo^1 ; Zhang, Wei^1 ; Liu, Fangmeng^1 ; Yang, Diying^1

Qingdao University of Technology, Qingdao

266520, China^1

关键词: Construction risk assessments;    Construction risks;    Construction safety;    Control measures;    Deep foundation pit;    Evaluation index system;    Fuzzy comprehensive evaluation method;    Risk assessment methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/153/5/052018/pdf
DOI  :  10.1088/1755-1315/153/5/052018

来源: IOP

【 摘 要 】

In order to get an accurate understanding of the construction safety of deep foundation pit in metro station and reduce the probability and loss of risk occurrence, a risk assessment method based on G-COWA is proposed. Firstly, relying on the specific engineering examples and the construction characteristics of deep foundation pit, an evaluation index system based on the five factors of "human, management, technology, material and environment" is established. Secondly, the C-OWA operator is introduced to realize the evaluation index empowerment and weaken the negative influence of expert subjective preference. The gray cluster analysis and fuzzy comprehensive evaluation method are combined to construct the construction risk assessment model of deep foundation pit, which can effectively solve the uncertainties. Finally, the model is applied to the actual project of deep foundation pit of Qingdao Metro North Station, determine its construction risk rating is "medium", evaluate the model is feasible and reasonable. And then corresponding control measures are put forward and useful reference are provided.