MEASUREMENT AND FORCED ANALYSIS OF FORMWORK SUPPORTING FRAME WITH NEW PULLEY-CLIP STYLE

The formwork supporting frame with new pulley-clip style, used in the complex teaching building located in the new campus of Hebei Normal University, was selected as the study object. Based on engineering practice, the axial compression of vertical poles and the pull-out resistance of bottom reinforcing tubes were tested and compared with relevant specifications. The results showed that, it was more reasonable to choose 3.0 kN/m² as the standard value of construction live load, and the value of 2 kN/m² provided by Unified Standard for Safety of Scaffold in Construction (GB 51210—2016) was relatively low. By assuring the adapter plug was knocked at least twice during construction, the pull-out resistance of bottom reinforcing tubes could basically meet the requirement of 1.2 kN prescribed by some relevant specifications. However, the pull-out resistance value of 3 kN prescribed by some other relevant specifications, was difficult to achieve, suggesting that these requirements needs a further discussions.