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1997年4月10日,山西省兴安化学材料厂南围墙7号下水出口处发生坍塌,将正在施工的民工6人埋住,造成4人死亡、2人受伤的重大事故。该工程管沟的沟底最宽处为1.5m,最窄处为1.3m,深约4m,要求挖深6m、20m长。察看现场,认为放坡不够,便支了4道架板,每道架板约500mm 宽,架板竖向上、下各支一根圆木。该处土质属杂填土和垃
On April 10, 1997, the exit area of the No. 7 South Wall of the Xing’an Chemical Materials Plant in Shanxi Province collapsed and buried six migrant workers under construction, resulting in four fatal accidents and two injuries. The widest part of the ditch at the bottom of the project is 1.5m, the narrowest part is 1.3m, and the depth is about 4m. The required depth of digging is 6m and 20m. Looking at the scene, he thought that there was not enough grading, and he had four racks. Each rack was about 500mm wide, and each rack had a log vertically and downwardly. The soil is miscellaneous filling and rubbing