Method for increasing wall connecting piece and improving and determining bearing capacity of support frame

Abstract

The invention relates to a method for increasing horizontal restraint and improving and determining bearing capacity of a support frame. The support frame is loaded in a 5-span * 5-span range in a mode of longitudinal 8 spans and transverse 6 spans; the support frame is loaded in a mode of 2 spans on one longitudinal side and 1 span on the other side outside the loading area; the support frame is loaded in a mode of 1 span on one transverse side outside the loading area and on span on the other side; the height of the frame is 8.2 meters, the step pitch of upright rods is 1.24 meters, the longitudinal distance between the upright rods is 0.9 meter, the transverse distance between the upright rods is 0.9 meter, the height-width ratio of a bracket is 1.5, and the support frame is erected by using phi48*3.2 steel pipes; each joint is connected through bucklers; adjustable bracket jacking phi48*3.2 double steel pipes are used as supporting load main beams on the upper part of the bracket, the adjustable bracket bottom is inserted in the upright rods of the support frame and is fixed, the distance between the upper surface of an adjustable bracket and the top transverse pipe of the bracket is 0.55 meter, and the adjustable bracket extends out of the upright rods for 0.3 meter and is adjusted in the range of 0.3meter. The invention is characterized in that a horizontal restraint rod is arranged on a reaction frame at the height of 5.3 meters, the critical load loaded to the support frame is 24kN. When the load does not change, the upright rods of the support frame deform greatly, and deform transversely by 12cm-15cm, the upright rods and the horizontal restraint rod are connected through bucklers by a linkage wall rod, the transverse horizontal restrain is increased and the critical load is increased to 26.5KN. By increasing horizontal restrain, improving and determining the support frame loading force, the fastener support frame has economic and reasonable structure, and is safe and practical.

Description

technical field [0001] The invention relates to a method for increasing and determining the bearing capacity of a support frame by adding rigid wall parts. The support frame used on construction sites, especially the fastener type steel pipe support frame, can effectively improve the bearing capacity by adding horizontal constraints such as wall rods. Background technique [0002] At present, the support frame used on the construction site is relatively free to set up the wall parts (the components that connect the support frame body with the main structure of the building and can transmit tension and pressure). Some do not set it, and the critical load increase value cannot be determined if it is set , There is no corresponding relationship between the erection structure and the critical load after adding wall parts. On-site erection is based on experience. On the one hand, it will cause waste of materials and increase the cost. On the other hand, it will cause potential saf...

AI Technical Summary

Problems solved by technology

[0002] At present, the support frame used on the construction site is relatively free to set up the wall parts (the components that connect the support frame body with the main structure of the building and can transmit tension and pressure). Some do not set it, and the critical load increase value cannot be determined if it is set , there is no corresponding relationship between the erection structure and the critical load after adding the wall parts, and the on-site erection is based on experience. On the one hand, it will cause waste of materials and increase the cost. On the other hand, it will cause potential safety hazards, and some even cause major safety accidents

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