1987年3月2日下午,杭州米市巷建筑队仓库地坪预制多孔板断裂,造成二人死亡。该仓库地处河岸边,地坪采用架空预应力多孔板。事发前该建筑队擅自将17吨钢材堆入库内,因板面荷载大大超过预制多孔板的允许承载力,当时发现多孔板下挠、开裂,建筑队见势不妙,连忙卸去三、四吨钢材后,即派 On the afternoon of March 2, 1987, the prefabricated porous plate in the storehouse of the Mishixiang Building Warehouse in Hangzhou broke down, killing two people. The warehouse is located on the bank of the river and overhead prestressed porous plates are used on the floor. Before the incident, the construction team arbitrarily dumped 17 tons of steel into the warehouse. The board load greatly exceeded the allowable bearing capacity of the prefabricated perforated plate. At that time, it was found that the perforated plate cracked and cracked. The construction team was in a bad situation and quickly unloaded three. After four tons of steel, it is sent