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民用建筑中,毛石基础强度不足的事故时有发生,其后果轻的造成经济损失,重的造成人身伤亡。原因在于对影响毛石基础强度因素缺乏全面地了解,施工过程中重视也不够。下面就影响毛石基础强度的因素进行一些分析。1.毛石选用毛石标号是确定基础强度的主要因素,一般情况下设计选用300号大石,直径不小于30厘米。但有的工程队为了抢进度,省钱,把一些粉尘大、水锈多、强度不够的大石买了进来,这种毛石在砌筑时因为有粉尘、水锈,不能和砂浆很好的连接,待到荷载增加时就出现了裂
In civilian buildings, accidents with insufficient strength of the rubble foundation occur from time to time, resulting in economic losses resulting from light consequences and heavy casualties. The reason is that there is a lack of a comprehensive understanding of the factors affecting the foundation strength of rubble, and insufficient attention has been paid to the construction process. Here are some of the factors that affect the strength of the foundation of the rubble. 1. The use of rubble markings in rubble is the main factor in determining the foundation strength. In general, the design uses large stone No. 300 with a diameter of not less than 30 cm. However, some engineering teams bought money in order to grab progress, save money, and bought some big rocks with large dust, lots of rust, and insufficient strength. This kind of rubble could not be well-polished with mortar because of dust and rust. Connections, cracks appear when the load increases