摘要
扣件式钢管脚手架用于承重支架时,立杆、水平杆、斜杆相互间用扣件连接。通过对直角扣件施加不同的扭紧力矩,对新旧扣件进行试验研究,得出扣件螺栓扭紧力矩与抗滑移的关系,并提出抗滑移系数的概念。指出扣件式钢管支架安装时扣件扭紧力矩必须≥40N·m;对于新扣件,扭紧力矩增大,抗滑移有一定提高,但对于旧扣件,容易造成滑丝,不安全。目前市场上T形螺纹质量较差,建议施工前对旧扣件螺栓进行检查。
When fastener-style steel tubular scaffold is as bearing stent,upright stanchion,horizontal bar and oblique bar are connected by fastener. Through experimental study on new and old fasteners applying different tightening moment on right angle fastener,the relationship of tightening moment of fastener bolt and anti-sliding performance is gained,and the anti-sliding coefficient is indicated. It is indicated that the tightening moment of fastener must be greater than and equal to 40N·m,as new fastener,anti-sliding performance can improve as tightening moment increase,however,sliding wire is easy for old fastener. Because of low quality of T-shape thread,checking old bolt before construction is necessary.
出处
《施工技术》
CAS
北大核心
2010年第4期85-86,93,共3页
Construction Technology
关键词
钢管支架
直角扣件
抗滑移
试验研究
steel tubular stent
right angle fastener
anti-sliding
experimental study
