塔式起重机塔身高强度螺栓预紧的现状浅析  

A Brief Analysis in current Situation of Pre-tightened High Strength Bolts on Tower Crane Frame

作　　者：张青[1] 宋世军[1] 王玉玲[1] 

机构地区：[1]山东建筑工程学院

出　　处：《工程机械》2004年第6期52-55,共4页Construction Machinery and Equipment

摘　　要：文章分析了《规范》对塔式起重机塔身标准节连接用高强螺栓预紧的要求,以及目前施工常用的两种高强螺栓预紧方式,得出结论施工中高强螺栓的实际预紧转矩可以减小到规范给定值的65%～80%是错误的,并提出应尽快研制一种专用的塔身高强螺栓预紧电动工具,研究预紧方法,以提高塔机的安装质量,提高塔机整个生命周期的安全性。Requirements in criteria on pre-tightened high strength bolts for standard connections of tower crane frames are analyzed, and two currently used pre-tightening methods of high strength bolts are described in the article. It is concluded that it is un-correct to reduce the actual pre-tightening torque of high strength bolts to 65~80 percent of specified values in construction. It is suggested that a dedicated electric tool should be developed to pre-tighten high strength bolts and the pre-tightening methods should be studied as well, in order to increase installation quality and safety in the life span of tower cranes.

关 键 词：塔式起重机 塔身 螺栓 预紧 

分 类 号：TH213[机械工程—机械制造及自动化]