When installing the long-span bridge, it is necessary to install it according to the embedded requirements of the bridge project, so that the bridge can be fixed more firmly. When wiring the bridge, the dirt and water in the groove should be eliminated; Before deploying cables, check whether the model, specification, route and location of the cable tray meet the design requirements, and then install it. In order to help you better install the cable tray, the Shandong cable tray manufacturer will introduce the special embedment and wiring requirements of the cable tray.
According to the special embedded requirements of the project
According to the characteristics of concrete construction in this project, the following points should be carefully before the bridge installation:
① According to the design of the weak current pipeline system, the bridge support angle iron shall be pre-fired at the concrete support before the concrete is subject to anti-corrosion treatment, so as to prepare the fixing parts for the bridge installation.
② The bridge support shall be fixed on the support angle iron, and the support angle iron and support shall be subject to anti-corrosion treatment to avoid affecting the concrete quality.
③ Installation of supports and hangers:
The steel used shall be flat and straight without obvious deformation. After blanking, the length error shall be within 5mm, and the cut shall be free of curling or burr; Branches and hangers shall be installed firmly to ensure horizontal and vertical; Generally, the distance between fixed fulcrums should not be greater than 1.5-2.0 mm
Fixed supports shall be set within 500 of the three ends of the junction box, box, cabinet, turn, corner and T-joint. The specification of point support and hanger shall not be less than 30mm * 3mm flat iron and 25mm * 25mm * 3mm flat steel.
Wiring requirements for long-span bridge
Before wiring the bridge, the dirt and water in the groove shall be eliminated; Before deploying cables, check whether the model, specification, procedure, route and location meet the design requirements.
The sum of the cross-sectional areas of conductors including insulation in the unified bridge shall not exceed 40% of the internal cross-sectional area; The cable cloth should be straight and free from twists and knots, and should not be squeezed and damaged by external forces; Before deployment, labels shall be pasted on both ends of the cable to indicate the starting and ending positions; The label should be legible; Accurate. Cables for weak current systems such as power lines, signal cables, twisted pairs and optical cables in buildings shall be arranged separately.
The clear distance between cables shall meet the design requirements; Redundancy shall be provided when deploying cables. In the handover room and equipment room; The reserved length of stranded cable is usually 3-6m. The working area is 0.3 to 0.6 meters; The reserved length of the optical cable at the equipment end is usually 5-10 meters; If there are special requirements, the length and cable layout shall be reserved according to the design requirements.
The above content has been introduced to you. From it, we know that the bridge installation work is very tense. When we install the bridge, we must firmly abide by the above requirements, and install according to the requirements, so that the bridge can be better fixed. I trust you will have a new understanding and understanding after reading it. Come to our website for more relevant content http://www.sddlqj.cn Ask!