A nested detachable node with double outriggers for prefabricated support and its construction method

Abstract

The invention discloses a double-support-legs nested detachable node for assembled type supporting and a construction method thereof, and belongs to the technical field of construction auxiliary workpieces. The main principle of the double-support-legs nested detachable node is the decomposition of force under static stress balance, the double-support-legs nested detachable node is mainly used foradjusting the supporting length of the assembled steel support and exerting and bearing the pre-axial force. The double-support-legs nested detachable node is composed of a wedge-shaped body, a clamping plate, a sliding base, an end plate, a jack tray and a high-strength bolt. The device is under the combined action of three sets of high-strength bolts, and clamping is carried out after the two symmetrical clamping plates and the wedge-shaped body are nested in an arc-shaped protruding mode through the wedge-shaped body, so that the purpose of controlling the deformation of the foundation pitis achieved by bearing and transmitting the axial force of the assembled steel support. According to the device, the stress is uniform, the bearing performance is good, the rigidity is large, the stability is high, the overall performance is good, the spare part is not needed, the quality control is good, the application is convenient and rapid, repeatedly use can be achieved, the device is an efficient and safe construction device for adjusting the length of the steel support and bearing the axial force.

Description

technical field [0001] The invention relates to a double outrigger nested detachable node for assembled support and its construction method, which is mainly used for adjusting the support length, applying and bearing pre-loaded axial force of assembled steel support, and belongs to the auxiliary workpiece technology of infrastructure construction field. It can be applied to foundation pit support, underground tunnel and pit support, temporary roof support for bridges and construction fields, etc. Background technique [0002] Prefabricated steel supports are widely used in foundation pit engineering, buried tunnels and pits, bridges and construction fields due to their advantages of simplicity and speed, stable quality and quality control, and green construction. Surface displacement plays a very important role. As for the length adjustment and complement of the assembled steel support, the steel wedge-type joints using single-cylinder jacks or double-cylinder jacks to ext...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the force transmission of the assembled steel support detachable nodes in the prior art by the steel wedge, resulting in stress concentration and eccentric force, insufficient rigidity and stability, poor integrity and requires a large number of spare parts, and difficult quality control. To protect the disadvantages, it provides a kind of nested double outrigger for assembly support with the advantages of uniform force, good load-bearing performance, high rigidity and high stability, good integrity, no need for spare parts, and good quality control. Disassemble the node device

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