Construction process and specifications of the hot

2022-09-22
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Weak current engineering construction process and specifications

Abstract: four stages of building weak current and information system construction and process specifications that should be paid attention to

key words: weak current engineering construction process regulations Untitled Document (I), construction process construction process can be divided into four stages: construction preparation, construction stage, commissioning and completion acceptance stage. This process is formulated in combination with the actual situation of the company. 1、 Construction preparation 1. Learn and master relevant specifications and standards, and strictly abide by the construction and acceptance specifications of building weak current installation engineering, the installation process standards of the region and various regulations of local relevant departments. The regulations that should be observed in this project mainly include: technical code for cable television system engineering (GBJ), general requirements for communication optical cables (gb/t), technical code for civil closed-circuit surveillance television system engineering (GB), code for engineering design of generic cabling system in buildings and buildings (CECs), standard for cables in commercial buildings (eai/tia-568a). 2. Be familiar with and review drawings. Be familiar with and review drawings, including learning drawings, Understand the design intent of the drawings, master the design contents and technical conditions, and form a summary after the joint review of the drawings, which is jointly signed by the design, construction and construction parties as a supplementary technical document of the construction drawings. Check whether there are contradictions and errors between civil engineering and installation drawings, and clarify the cooperation relationship between various disciplines. 3. The schedule of the construction period is detailed in the construction schedule. 4. The technical disclosure shall clarify the characteristics of the construction task, technical quality requirements, system division, construction technology, construction points and precautions, so as to be well aware of them, so as to facilitate the planned, organized and efficient completion of the task. The second is the specific requirements for engineering technology, safety measures, construction procedures, preparation, etc. 5. Construction budget construction and installation project budget can be divided into design budget, construction drawing budget, design budget, etc. according to different design stages. The method for preparing cost estimates of safety and prevention projects (ga/t) was issued by the Ministry of public security and is implemented nationwide as a public safety industry standard. 6. Construction organization design II. Cooperate with civil engineering and other projects in the construction stage, and pay attention to and follow their construction rules. 1. Cooperation between reserved holes and embedded pipelines and civil engineering. In the construction of civil foundation, the lead holes of grounding works, the wall holes of piping in the floor, the wall protection pipes of cables and incoming pipes should be embedded. 2. The construction of trunking frame and the coordination of civil engineering the installation and construction of trunking frame shall be carried out synchronously with the installation of other pipelines (air ducts, water supply and drainage pipes) after the basic completion of civil engineering, or later than the pipeline installation for a period of time, but the reasonable placement and coordination of weak wire trunking frame and pipeline in space must be solved. 3. The matching wiring and threading of pipeline construction and decoration works shall be carried out simultaneously with the decoration works after the completion of civil works. The schedule shall avoid the difficulty of threading and laying after the completion of decoration works. 4. Coordination of layout and decoration works of each control room. The decoration of each control room should be synchronized with the overall decoration works. The positioning, installation and terminal connection of weak current system equipment should be at the end of the decoration works and make it easier to start the sales of products. III In the commissioning and opening stage, the single equipment or components are debugged first, then the local or regional debugging, and finally the overall system debugging. The specific debugging depends on the system type. 4、 At the stage of completion acceptance, the acceptance of the project is divided into three steps: concealed works, subdivisional works and completed works. 1. The weak acceptance of concealed works is that the embedded pipelines, directly buried cables, grounding electrodes, etc. in the installation are all concealed works. 2. Constant temperature accuracy: ± 0.5 ℃ these works should be inspected and accepted by the construction unit representative (or supervisor) before the next construction sequence, and the acceptance procedures of concealed works should be carefully completed, Included in technical archives. 2. Acceptance of subdivisional works after the completion of a certain stage or a certain subdivisional works, the construction unit and the design unit shall conduct subdivisional acceptance; For some single projects, the construction unit shall report to the local competent department for acceptance. 3. Completion acceptance project completion acceptance is a comprehensive inspection and acceptance of the whole project construction project. Before the formal acceptance of the project, the construction unit shall conduct pre acceptance, check the relevant technical data and project quality, and solve the problems found in time. Then the construction unit, together with the design unit and the construction unit, shall report to the local competent department for acceptance. (2) During the whole process of construction, the construction process shall check the operation quality item by item in strict accordance with the project quality inspection and evaluation standards. After the completion of the project, the construction quality shall be evaluated, and the quality assurance data shall be prepared to ensure that the delivered project meets the design requirements and meets the use function. 1、 Laying of electrical lines A. general provisions 1. Before laying cables (wires), check the appearance and continuity, and measure the insulation resistance with a DC 500V megger, with the resistance not less than 5m Ω; When there are special regulations, they shall be complied with. 2. The lines shall be laid in the shortest way, horizontal and vertical, neat and beautiful, and should not be crossed. 3. The line should not be laid in areas prone to mechanical damage, corrosive medium discharge, humidity, strong magnetic field and strong electrostatic field interference; Take corresponding protection or shielding measures when necessary. 4。 When the temperature around the line exceeds 65 ℃, take heat insulation measures; Fire prevention measures shall be taken when the location is in a fire source place that may cause a fire. 5. The lines should not be laid in parallel above high-temperature process equipment and pipelines and below process equipment and pipelines with corrosive liquid medium. 6. The distance between the line and the insulated process equipment, the surface of the pipe insulation layer should be greater than 200mm, and the distance between the line and other process equipment, pipe surface should be greater than 150mm. 7. Appropriate redundancy shall be reserved at the terminal connection of the line and at the expansion joints and settlement joints passing through the building. 8. There should be no intermediate joint in the line. When it is unavoidable, it should be wired in the junction box or junction box, and the joint should be crimped; When welding is used, non corrosive flux shall be applied. The compensation conductor should be crimped. Coaxial cables and high-frequency cables shall adopt special connectors. 9. When laying the road, it is not suitable to chisel installation holes on concrete soil beams and columns. 10. After the line is laid, it should be calibrated and numbered, @11. Test other groups of samples according to the above 4~9 items in sequence, and record in advance. Calculate the average value of the same sample, and measure the insulation resistance according to the provisions of Article 1. 11. When measuring the insulation of the line, the connected equipment and

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