基于结构方程模型的基坑工程事故致因分析

摘要

With the rapid progress of urbanization,more and more high-rise buildings and underground space development,excavation engineering accidents occur frequently,also brought huge losses to the so-ciety. How to reduce the accident frequency and reduce the loss of the accident is one of the problems to be solved at present. It is important to analyze the excavation engineering accidents causation and study the causes of foundation pit accident,it can strengthen the safety management level and reduce the rate of excavation engineering. This paper proposed the accident-causing factors conceptual model of excava-tion engineering based on predecessors'research and accident cause theory. In combination with the ac-tual situation of foundation pit construction and previous studies,select research variables from construc-tion,survey,design,construction,supervision,and monitoring,put forward a hypothesis model of the rela-tionship of foundation pit engineering and carried out questionnaire survey,data analysis and model vali-dation,analysis on the impact factors of excavation accidents. The results showed that site construction and monitoring has the greatest effect on the management of foundation pit engineering accident,supervi-sion,design and other aspects have larger impact on excavation accident,the survey and construction u-nit have less affect on excavation accident.%城市化的快速推进使得高层建筑和地下空间开发越来越多,基坑工程事故频繁发生,给社会带来巨大损失,如何降低基坑事故的发生频率,减少损失,成为当前亟需解决的问题之一.因此,分析基坑工程事故影响因素,研究基坑事故发生原因,对于提高基坑工程安全管理水平,降低基坑事故发生率具有重要意义.基于事故致因理论,结合基坑建设实际情况及前人研究,以建设、勘察、设计、施工、监理、监测作为研究变量,提出基坑工程致因关系假设模型,并进行相应的问卷调研、数据分析及模型修正及检验,对基坑工程事故的影响因素进行分析.结果表明,现场施工及监测管理水平对基坑工程事故影响最大,监理、设计等环节对基坑工程事故影响较大,勘察、建设单位管理等环节影响较小.