Construction requirements of triangular bracket in prestressed steel composite bracing construction
The position and elevation of the triangular bracket shall be determined according to the design drawings. If there is any change, it shall obtain the consent of the design unit and have written permission.
The steel triangle bracket on the closed boundary line around the foundation pit shall be set to control the upper enclosing purlin center line at the same horizontal plane. Before welding the triangular bracket, the steel plate shall be welded after breaking the pile concrete, and the triangular bracket shall be welded on the welded steel plate to ensure that the three connecting parts are firm and reliable,It has enough stability,No distortion, welding phenomenon; The length and levelness of the horizontal bar meet the requirements.
During the docking process between the triangle bracket and the existing steel parts of the enclosure structure, a measuring technician shall monitor the perpendicularity, elevation and levelness of the triangle bracket during the whole process, and the allowable value of the horizontal elevation error of the triangle bracket is required to be5mm, the allowable height difference of the top surface of the adjacent brackets isL/1500(LIs the spacing) and should not be greater than10mm.
The quality of the on-site welding work shall be determined by the on-site quality inspector of the construction team according to the Technical Regulations for Welding of Building Steel Structures (JGJ81-2002) On-site inspection of the groove, gap and blunt edge of the welding part.
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