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Analysis of seismic design requirements for seismic supports
作者:管理员    发布于:2019-04-12 14:58:58    文字:【】【】【】浏览 (786)
摘要:ntroduce the seismic design requirements of seismic supports. (1) The following equipment and pipelines should adopt seismic supports and hangers: Air-conditioning unit fans with a gravity of 1.8KN. Air ducts with rectangular cross-sectional area greater than or equal to 0.38m2 and circular diameter greater than or equal to 0.7m. Smoke prevention and exhaust duct, accident ventilation duct and related equipment. The indoor water supply, hot water and fire-fighting pipes that need to be fortified are greater than or equal to DN65 horizontal pipes. 8 degree, 9 degree area...

Introduce the seismic design requirements of seismic supports.

(1) The following equipment and pipelines should adopt seismic supports and hangers:

The air-conditioning unit fan with a gravity of 1.8KN. Air ducts with rectangular cross-sectional area greater than or equal to 0.38m2 and circular diameter greater than or equal to 0.7m. Smoke prevention and exhaust duct, accident ventilation duct and related equipment. The indoor water supply, hot water and fire-fighting pipes that need to be fortified are greater than or equal to DN65 horizontal pipes. When the linear length of the water supply and drainage risers of high-rise buildings in the 8 degree and 9 degree areas is greater than 50m, seismic measures should be adopted. When the linear length is greater than 100m, seismic measures should be adopted. Electrical piping with an inner diameter of not less than 60mm and a cable ladder, cable trough box and busway with a gravity of not less than 150N/m.

(2) The seismic support should be reliably connected to the main structure of the structure. According to the seismic fortification intensity of the project site, the seismic force is the main load, and it is replaced by anchors, reinforced booms, seismic connection members and seismic braces.

(3) All components that make up the seismic support and hanger should be finished components, and the structure of the connecting fasteners should be easy to install.

(4) Pipeline seismic supports and hangers should never limit the displacement caused by thermal expansion and contraction of pipelines, and their setting and design should meet relevant regulations.

(5) All anti-seismic supports and hangers should be reliably connected to the main structure. If the pipeline passes through the settlement joint of the building, the influence of non-uniform settlement should be considered.

(6) For the new construction, the maximum distance between the rigid material cable ladder, cable tray and the seismic support hanger of the cable trough box is 12m, and the maximum longitudinal distance is 24m.

(7) The maximum distance between the non-metallic cable ladders, cable trays and cable trough boxes of the seismic supports and hangers of the new construction is 6m, and the maximum longitudinal distance is 12m. 3.1.3.8 The maximum design spacing of lateral seismic supports for rigid pipelines of new construction projects is 12 meters, and the maximum design spacing of longitudinal seismic supports is 24 meters; the above parameters of flexible pipelines are halved; the above parameters of pipelines for reconstruction and expansion projects are halved.

(8) The maximum design spacing of rigid rectangular air duct lateral seismic supports of new construction is 9 meters, and the maximum design spacing of longitudinal seismic supports is 18 meters; the above-mentioned parameters of flexible ducts are halved; the above-mentioned parameters of pipelines of reconstruction and expansion projects are halved.

(9) 3. In addition to the factory self-inspection of the components of the seismic support and hanger (including channel steel, connectors, spring nuts) produced by the earthquake-resistant support and hanger manufacturer, each batch of products should be sent to the national testing agency for mechanical testing. This ensures structural safety.

(10) The remaining specifications and implementation requirements should meet the relevant provisions of the "Code for Seismic Design of Building Mechanical and Electrical Engineering".

(11) Quality assurance requirements

(12) Construction personnel qualification requirements A) All pipeline assemblers and equipment installers should have more than three years of relevant work experience in the industry. B) All pipes and fittings used in this project should meet the standards required by the technical specifications in the bidding document. C) All welding technicians must have a valid construction certificate issued by the relevant government agency.

(13) Responsibilities of the supplier of the finished support and seismic support The supplier shall design the entire pipeline support system, perform detailed calculations on the force of the comprehensive support and hanger and the selection of materials, provide mechanical calculations, and provide design drawings for Party A Designated design institute review. If the design institute has opinions, the supplier shall make amendments in accordance with the opinions of the design institute until the design institute approves it. Supply on time according to Party A’s construction project schedule, and shall not affect the project schedule; The supplier shall provide a complete "Technical Manual for Finished Bracket Installation", "Finished Bracket Installation and Use Guide", "Finished Bracket Load Calculation Book", and "Finished Bracket Site Installation" A complete set of materials such as the Instruction Manual to ensure product safety and provide quality services. The supplier needs to send technicians to provide on-site training of workers and technical guidance services during the entire bracket and pipeline installation process.

(14) Document submission for review The supplier shall submit detailed drawings of the pipe support and fixed support for review and approval. The supplier and the construction party shall submit pipeline testing and cleaning procedures for approval. The constructor shall submit a complete test report after the test and put into operation.

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