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在素混凝土或稀疏配筋的大体积混凝土施工中,从节约水泥的愿望出发,根据施工规范,可以掺入一定比例的毛石(块石)。但可能违反设计意图、遭到设计反对。既然是违反设计意图,必然有损工程质量,难保工程安全,自然应算作工程事故。一、事故1. 1985年施工的某洗煤厂铁路装车仓工程,为现浇钢筋混凝土仓斗及框架、独立柱基。由于载荷量大,每个柱基的混凝土量达30余m~3,仅底面配有钢筋网。为了节约水泥,现场施工人员在未取得设计单位同意的情况下,习惯地按照施工规范要求,掺入了一定数量(约20%) 的毛石。后经设计单位驻工地代表和外国专家发现,指责违反设计要求,认为潜在的危险性很大,坚决要求返
In the mass concrete construction of plain concrete or sparse reinforcement, starting from the desire to save cement, according to the construction specifications, a certain proportion of rubble (block stone) can be incorporated. However, it may violate design intent and be opposed by design. Since it is a violation of design intent, it will inevitably undermine the quality of the project, it is difficult to guarantee project safety, and it should naturally be counted as an engineering accident. I. Accident 1. The railway loading warehouse project of a coal washing plant constructed in 1985 is a cast-in-situ concrete hopper and frame and an independent pillar base. Due to the large amount of load, the concrete volume of each column base is more than 30m 3, and only the bottom surface is equipped with reinforced mesh. In order to save cement, on-site constructors customarily incorporated a certain amount (about 20%) of rubble in accordance with the requirements of the construction specification without the consent of the design unit. After the representative of the design unit on the site and foreign experts discovered that the accusation violated the design requirements, he believed that the potential danger was great, and he strongly demanded that