The design of the seismic support system of this project mainly includes: 1. Water supply, drainage and heating water pipe system: the pipes are made of plastic-lined hot-dip galvanized steel pipes, hot-dip galvanized steel pipes and welded seamless steel pipes. (including sprinkler) system: ≥ DN65 pipes should be equipped with anti-seismic supports; 3. Electrical (including fire alarm) system: cable trays and bus ducts should be used, with a gravity greater than 150N/m, all should be equipped with anti-seismic supports and hangers; 4. Ventilation And smoke prevention and exhaust system: the pipe material is galvanized steel sheet, the cross-sectional area of the ventilation pipe is ≥ 0.38 square meters, and all the smoke exhaust pipes should be equipped with anti-vibration brackets, and the air duct system with a circular air duct diameter greater than or equal to 0.7 meters;
Water supply and drainage, fire and seismic design
1. According to Article 3.7.1 of “Code for Seismic Design of Buildings” GB50011-2010: Non-structural components, including non-structural components of buildings and the mechanical and electrical equipment attached to the building and its connection with the main body, should be designed for earthquake resistance; Buildings and electromechanical engineering in the area of 6 degrees and above must be designed for earthquake resistance, and designed by a professional electromechanical earthquake resistance company; 3. The water supply and drainage of the pipe diameter above DN65 in this project, and the fire sprinkler piping system adopts the electromechanical pipeline seismic support system; 4. The maximum spacing of the lateral supports of rigid pipes shall not exceed 12m; the maximum spacing of lateral supports of flexible pipes shall not exceed 6m; 5. The maximum design spacing of longitudinal seismic supports of rigid pipes shall not exceed 24 meters, and the maximum spacing of longitudinal seismic supports of flexible pipes shall not exceed 12m ;6. All products should meet the “General Technical Conditions for Seismic Supports and Hangers of Construction Mechanical and Electrical Equipment” CT/T476-2015.
Electromechanical Seismic Design
1. Electrical piping with an inner diameter greater than 60mm and cable trays with a gravity greater than or equal to 150N/m, cable tray boxes, bus ducts and electromechanical equipment with a gravity greater than 1.8KN in the suspension pipelines must be equipped with an electromechanical pipeline anti-seismic support system and electromechanical equipment anti-seismic Supporting system; 2. The spacing of the seismic support is determined at the stage of deepening design on site, and meets the requirements of the specification “General Technical Conditions for Seismic Supports and Hangers for Mechanical and Electrical Equipment in Buildings” CT/T476-2015, (GB50981-2014), and each support system should be 3. The seismic support and hanger system shall be tested in accordance with the “General Technical Conditions for Seismic Supports and Hangers of Building Mechanical and Electrical Equipment” CT/T476-2015 to meet the rated load of the seismic connection parts. Under the action of 9KN, keep it for 1 minute, the parts have no fracture, permanent deformation and damage, and provide a test report stamped with CMA seal by a national testing agency, all parts of the seismic support (including channel steel, seismic connectors, screws, anchors) bolts, etc.) are all provided by the same manufacturer, and the connectors that cooperate with the channel steel should be one-piece connection fasteners, and spring nuts or other split connectors should not be used to ensure the reliability of installation and connection in the seismic support system. 4. The anti-seismic support system should use back-expanded bottom anchor bolts with mechanical locking effect, which must comply with the “Technical Regulations for Post-Anchorage of Concrete Structures” (JGJ145-2013), and pass the international or domestic Institutional seismic certification, and provide two-hour fire resistance test reports from domestic and foreign authoritative institutions.
Electromechanical Seismic Design
1.Anti-seismic brackets should be used for smoke prevention, accident ventilation ducts and related equipment;
2. The steel grade of the fastening anchor bolts is 8.8-grade steel, and the surfaces of all parts of the screw, sleeve, nut, and gasket are made of galvanized anti-corrosion technology. The thickness of the zinc layer is not less than 50Ųm;
3. The performance wall thickness of the C-shaped channel steel is not less than 2.0mm, the thickness of the connecting piece is not less than 4mm, and the thickness of the C-shaped channel steel of the assembled finished support and hanger system is ≥80 microns. The channel steel curling edge of the prefabricated support and hanger should have tooth pits of the same depth to ensure mutual occlusal connection. This occlusal connection mode can achieve ductile failure under special loads. In order to improve the connection reliability of heavy-duty pipelines and pipelines with vibration and dynamic loads on site;
4. C-shaped channel steel has three directions of compressive bearing capacity report: front, side and back, and the front is not less than 19.85KN ; The side is not less than 13.22KN; the back is not less than 18.79KN. Yield strength ≥ 330MPA; elongation after fracture ≥ 34%; increased tensile strength ≥ 443MPA to ensure section rigidity and ensure no deformation of channel steel section during transportation, cutting and installation;
5. The connection between channel steel connectors must be It adopts mechanical cold connection of teeth and has the seismic test report of the occlusal position. The anti-slip of M12 channel steel lock is not less than 6.09KN. In order to ensure the reliable connection between the connection points, the tensile bearing capacity of the M12 channel steel buckle is not less than 16.62KN; General Technical Conditions for Mechanical and Electrical Seismic Supports and Hangers of Buildings (CJ/T476-2015).
Post time: Apr-26-2022