Electrical construction scheme of a museum in Inner Mongolia
2.1 Project introduction This project is located in * * *, with a total construction area of 58520m2, including the collection library, exhibition hall, multi-function hall, office, etc. 2.2. Overview of building design No. Item content 1 Building category I high-rise 2 Fire resistance rating I 3 Seismic fortification intensity 8 4 Roof waterproof rating II 5 Building area Inner Mongolia * * Museum: 52169 ㎡ 6 Building height 50m 7 Building floors 6 8 Secondary structure wall material ceramsite concrete blocks 9 Exterior wall decoration dry hanging stone curtain wall, glass curtain wall Aluminum plate 10 roof construction polymer waterproof material (heat insulation method)+concrete+stone 11 floor construction collection: steel floor group H300+flooring material wooden series humidity control material exhibition hall: flooring material lobby: polished marble, guest toilet: granite 12 interior wall construction exhibition hall: plasterboard cloth sound absorption material lobby: polished marble, Guest toilet: polished marble 13. The external doors and windows of the door and window project are made of bridge cutoff aluminum alloy, the surface is coated with fluorocarbon coating method, double-layer transparent insulating glass, and tempered safety glass is used locally. The indoor doors and windows are ordinary wooden doors and ordinary aluminum alloy windows. 2.3. Overview of electrical professional design. High voltage power distribution system This project is a class I load power supply, Two 10kV high-voltage power supplies are introduced from Dongjiao and Haidong switching stations, and another 650kVA diesel generator set is provided as the third power supply. Low voltage distribution (power) system The grounding type of this project adopts TN-S system. The low-voltage feeder cabinet in the transformation and distribution room uses trunk or radial power supply to each circuit of electrical equipment. The power supply trunk adopts dense plug-in bus, full plastic flame-retardant and fire-resistant mineral insulated cables. The load of important equipment is distributed on the low-voltage side of two independent power supplies, and the ends are switched to each other to ensure uninterrupted power supply, The power consumption of fire equipment, security, treasures warehouse, exhibition room, etc. of the project are particularly important loads in the first level load. The power consumption of lighting in the corresponding network machine room, pump room, etc. is the first level load, and other parts are powered by the second level load. The lighting system includes ordinary, emergency and flood lighting systems. Intelligent control systems are used in public places such as the lobby, and centralized and decentralized control methods are used in other places; Emergency lighting lamps with batteries are provided in evacuation walkways, stairwells, front rooms, etc; Floodlighting is set on the roof and outdoor corresponding parts. The lamps and light sources of the lighting system adopt products with high luminous efficiency and high color rendering index, and the collection library adopts fluorescent lamps that can filter ultraviolet radiation, etc. Lightning protection grounding and equipotential bonding The whole project is designed according to the second class and the local part is designed according to the first class lightning protection level. The foundation reinforcement mesh of the building is used as the common grounding body, and the main reinforcement in the building structure column (or two Φ 16 round steels are laid separately) is used as the lightning protection lead wire at the corresponding part. Above 30m, the main reinforcement or two Φ 12 round steels are laid every 6m along the outer ring beam of the building to weld through as the grading ring, Metal structures, equipment and other metal objects shall be reliably welded to the grading ring, and Φ 12 lightning protection grid shall be set on the roof as the lightning arrester to prevent direct lightning. The main equipotential terminal board is set in the power transformation and distribution room, equipotential bonding is set at the entrance of various pipelines, and local equipotential bonding is set in weak motor rooms, power distribution rooms, equipment rooms, and sanitary wet places. At the same time, the building is equipped with various lightning protection inductance measures according to the design requirements. The lightning protection grounding, working grounding, protective grounding and anti-static grounding of the project share the same grounding device, and the comprehensive grounding resistance shall not be greater than 0.5. Intelligent building project The intelligent electrical system of the project includes automatic fire alarm and fire linkage system, safety protection system, building automation system, cable television system, generic cabling system, computer network and other systems. Each system project is further designed and constructed by each professional unit. 2.4 Project characteristics and construction countermeasures 2.4.1 The construction period objective is to ensure the completion of the construction task of the project, that is, to start on the date of * * *, and to complete on the date of * * *. The construction period is very tight. The construction countermeasures proposed by our company are as follows: ⑴. Make preparations for the early construction, organize relevant technicians with similar construction experience, discuss the quality control points of the project, and develop quality control plans to ensure the construction. ⑵ Increase resource allocation: due to the large floor area and high floors of the project, more equipment resources are invested in the construction arrangement of the project Actively promote the application of new technologies and mature and applicable scientific and technological achievements: organize technical personnel of new material manufacturers to conduct technical disclosure to construction personnel, and carry out multimedia teaching of new processes. ⑷ Actively prepare for the procurement of materials in the early stage: use our company's nearby construction site as the site for the stacking and processing of materials in the early stage of the project, and start the preparation of wall bushing and lightning protection grounding at the beginning of mobilization. According to the design requirements of the drawings and the scope agreed in the contract, the price of the materials should be well sought, with high quality and low price, so as to reduce the project cost Plan management control: as there is a lot of cooperation among disciplines (installation, interior and exterior decoration) of this subdivisional project, the realization of the construction period of each discipline is the key to achieving the goal of the total construction period. Control of plan preparation and review: the professional team of electromechanical installation will prepare monthly, ten day, weekly, daily and hourly plans for key processes of the project according to the requirements of the overall construction period of our organization's structure and decoration discipline; Review and approve the plan of subcontracting professional units, focusing on straightening out the overlap and logical relationship between each process; Specify the material support plan of the construction period plan (the inspection time of materials and equipment of each discipline, the mobilization time of materials and equipment, the inspection time of material and equipment sub suppliers, etc.). Implementation and management of progress plan: the Contractor must unconditionally implement the plan approved by the Owner and the Supervisor. As the project manager, he is fully responsible for the owner and supervises the implementation and completion of the general construction schedule. Our company will set up a special fund for duration rewards, develop a reward and punishment system for duration, mobilize the enthusiasm of all construction personnel, and ensure the realization of the overall duration goal by achieving the node duration Process control assurance: organize project construction in strict accordance with national quality standards to ensure that each divisional and subdivisional project is excellent at one time. After the acceptance of the basement structure, the installation of main pipes inserted into the basement and the installation of threading wires and cable trays for electrical pipelines shall be carried out. (7) Deepening design link control: under the leadership of the chief engineer of the project, the project deepening design department assists the design unit to deepen the design of the discipline, especially the underground pipelines and bridges of various disciplines in the same part are deepened into the same construction drawing, which is convenient for the coordination of installation and construction, so that our construction works can better reflect the designer's intention. At the same time, reduce the rework of design changes, build a truly high-quality project on the basis of ensuring the construction period, and further improve the design of functional drawings in coordination with Party A's sales requirements. 2.4.2 Quality objectives ensure "Grassland Cup" and strive for "Luban Prize". If a project is determined to create Luban Prize, it must establish the goal of creating Luban Prize, strengthen the confidence of creating Luban Prize, and take practical measures. In the actual process of the project, the objectives shall be decomposed and implemented to the grass-roots level, and strictly managed, controlled and inspected. The quality objective is high. How to ensure the realization of the project quality objective under the condition of a very short construction period is the difficulty of this project. Our construction countermeasures are as follows: organization guarantee: our company will list this project as the key project of enterprise excellence creation, select a set of capable, efficient and "high-quality" project team with construction experience in public buildings and fine decoration, and equip a construction team with good style, excellent technology and can fight hard. The company strengthens the monitoring of project quality, directly appoints the technical director of the company to stay in the project, and supervises and is responsible for the whole process of the project quality on behalf of the company. System guarantee: as an enterprise certified by ISO9002, our company has formed a mature and complete quality management system for all elements of quality control from project team organization, raw material procurement, construction process and post completion return visit service. After mobilization, the project quality assurance plan will be prepared according to the ISO9002 standard and procedure documents, in combination with the characteristics of the project, in accordance with the principles of process quality, dynamic management, node assessment, and strict rewards and punishments, to ensure that each sub divisional project is excellent and become a quality project, and ensure the quality project with process quality. Decompose and quantify the overall quality objectives, so that the overall quality objectives can be integrated into practical daily management: Decompose the overall quality objectives into the main stage quality objectives, decoration project quality objectives and electromechanical installation project quality objectives, and ensure the realization of the overall quality objectives through the control of each decomposition objective. Strengthen quality node control and eliminate common quality problems: for quality problems that are easy to occur in similar projects, organize personnel to set up a number of quality control nodes and weekly quality control points along with the construction progress of the project, discuss and implement relevant control measures, promote total quality management in the process, and carry out QC activities to prevent common quality problems. 2.4.3 Location characteristics The Inner Mongolia * * Museum is located at the intersection of * * *, adjacent to the * * building, forming the same building group. Construction countermeasures: our company will establish an environmental management system for the construction site according to the ISO14000 international environmental management system standard and the enterprise's Environmental and Occupational Safety and Health Management Manual, assign special personnel to take charge of environmental protection, and take a series of feasible measures in the embedding, installation and commissioning works to reduce various pollution, Minimize the impact of construction on the surrounding environment, and cooperate with the structural discipline to implement garden type site management on the construction site. 2.4.4 Coordination between disciplines Ventilation and coordination of pipeline and electrical installation: during the construction of various types of work, understand the layout of air ducts based on the principle of small pipelines giving way to large pipelines. Coordinate and adjust the pipeline, electrical bridge route and the position of supports and hangers of the project. Before reserving holes, all disciplines communicate and check the drawings to avoid the shortcomings such as crossing and failure to reach safe clearance in future installation. At the same time, the air duct shall be installed as early as possible to create favorable conditions for other types of work. If any problem is found, it shall be solved by all disciplines through negotiation. Cooperation between electrical and plumbing disciplines: if the plumbing discipline needs electrical linkage, check the drawings before construction to avoid omission. Meanwhile, implement the location of electrical piping to create favorable conditions for future wiring. There are many reserved sockets in the residential building. Pay attention to the safe distance between the radiator and the electrical socket during construction to avoid future chiseling displacement. Coordination of equipment installation with pipeline and electrical: the equipment shall be in place as soon as possible after arrival, creating conditions for pipeline piping and electrical wiring. The electrician shall test run the single machine to be qualified; During the equipment commissioning, the equipment maintenance fitter shall be the main part, and the electrical and weak current shall be coordinated, and the commissioning shall be arranged in a unified way. Installation and fire protection cooperation: after the piping is embedded in place, the threading line is handed over to the fire protection discipline for installation. During fire protection commissioning, the plumbing and electrical disciplines cooperate to conduct forced cutting, linkage, spraying and other tests. 2.5 Construction content The scope of construction drawings includes high-voltage distribution system, low-voltage distribution (power) system, lighting system, lightning protection grounding and equipotential bonding, as well as intelligent building engineering (automatic fire alarm and fire linkage system, safety protection system, building automation system, cable television system, generic cabling system, computer network and other systems), All weak current system works are further designed by professional units. This scheme is only for weak current pipeline laying works as construction measures.
