扣件式非高大模架立杆悬臂合理高度试验研究

Testing Research on Steel Low-rise Formwork with Couplers Poling Cantilever Reasonable Height

利用规范计算了不同悬臂高度立杆轴向力设计最大值(容许承载力),搭设了高度<3.7m的满堂模板支撑架,对单个立杆施加荷载,试验了不同悬臂高度的单个立杆的极限荷载,比较了立杆容许承载力和试验极限荷载之间的关系,发现悬臂高度<0.8m左右时试验极限荷载均大于容许承载力,从而得到非高大模架(高度<3.7m)悬臂安全高度为0.7m的结论。试验结果对提高建筑施工企业施工便利性和工作效率有显著帮助。

Utilizing the technical standard,the maximum value is calculated about designing the different cantilever height poling axial force（ allowable bearing capacity）,and setting the full steel tubular scaffold whose height is less than 3. 7 m,next applying loads to single poling,testing the limit loads of single poling of different cantilever height,comparing the relationship between poling allowable bearing capacity and testing limit loads,the testing limit loads is greater than allowable bearing capacity when the height of cantilever height is less than 0. 8 m,thus the conclusion is made that cantilever’s safety height of low-rise formwork（ not more than 3. 7 m） is 0. 7 m. The testing result can make a great contribution to improve the construction enterprises’ convenience of construction and work efficiency.