塔式起重机基础与底架、底架与基础节、基础节与标准节、标准节与标准节之间均采用高强度螺栓连接。为防止螺栓断裂,生产厂家大多采用增大螺栓直径和提高螺栓强度等级这2种措施。事实上,在造成螺栓断裂的诸多原因中,强度不足不是主因,更多的问题出在使用和制造方面。本文从塔机使用和制造方面对塔机标准节螺栓断裂的原因进行分析,并提出一些预防措施。1.螺栓断裂的原因 Tower crane foundation and chassis, chassis and base section, basic section and standard section, standard section and standard section are used between the high strength bolts. In order to prevent the bolt from breaking, most manufacturers adopt two kinds of measures: increasing the bolt diameter and increasing the bolt strength grade. In fact, the lack of strength is not the main cause of the bolt breakage. The more problems are the use and manufacture. This article analyzes the reasons of tower crane standard section bolts breaking from the use and manufacture of tower crane, and puts forward some preventive measures. 1. The reason for the broken bolt