Buildings that are prefabricated with factory components and accessories and assembled on machinery at the construction site are called prefabricated buildings. With the intensification of urbanization and the urgent need for economic and social development for engineering construction, we are pushing for the development of prefabricated buildings with industrialized means and industrialized platforms. Prefabricated buildings have begun to conduct in-depth research and technical practices in the distribution network construction. Through industrialized production methods and on-site assembly methods, the use of prefabricated prefabricated buildings has shown a scale effect, which is consistent with the concept of sustainable building development and has broad application prospects. In the distribution network construction will become the mainstream mode of construction.
The characteristics of a prefabricated building
1, improve the quality
Prefabricated components produced by factory standardization no longer use the on-site pouring, masonry, and stucco processes, and have a high surface finish to achieve fair-faced concrete effects. Industrialized assembly methods make prefabricated products more secure, while image effects are easier to control.
2, shorten the duration
Prefabricated buildings transfer most of the on-site operations of a building to a prefabricated factory. The on-site assembly speed is much faster than on-site pouring. After the excavation on site, construction can be completed as soon as possible, and the construction period is more flexible.
3, green
A large number of wet operations were completed in the factory. The construction site became a dry operation. The construction site was civilized, greatly reducing the environmental atmosphere, noise pollution, and reducing construction waste, thereby greatly reducing the phenomenon of construction disturbance.
4, reduce manpower
In the distribution network construction, prefabricated assembly construction site work links are few. Mechanized means, the required labor costs are greatly reduced, which can greatly reduce the labor intensity of workers and the incidence of safety accidents.
5, full life cycle cost dominant
Compared with traditional buildings, prefabricated construction costs are still higher, but the more standard components, the higher the production efficiency, and the corresponding component costs will decrease. In addition, the life cycle cost of prefabricated prefabricated buildings is dominant, and it conforms to the concept of sustainable development of buildings. The comprehensive benefits are obvious.
Relevant components of prefabricated buildings in distribution network
In accordance with the principle of applying different manufacturers' equipment requirements, building component systems, and unified component standards, combining on-site construction environments with fully assembled, prefabricated, and cast-in-place assembled monolithic components is considered; on the other hand, modular design and flexible splicing are considered. The size of components is optimized and unified, and the types of prefabricated standard parts are used to reduce the number of pre-engineered molds and form a more streamlined and practical standard prefabricated component category library.
1, outdoor switch box, ring network cabinet basis;
2. Box-type substation foundation;
3. Cable working wells (straight wells, corner wells, three-pass wells, intermediate joint wells);
4. Prefabricated cable trenches (prefabricated cable buried concrete components, prefabricated cable caul tubes, prefabricated cable tunnels);
5, prefabricated integrated corridors;
6, steel structure distribution room (two in six out, two in eight out, etc.).
Three distribution network prefabricated building application principles
1. It can be prefabricated without pouring, and it can not be made of steel structure.
2. Mechanized excavation and hoisting do not use manpower.
Four distribution network prefabricated building application conditions
1. The construction site has the conditions for open digging;
2, buried deep shallow soil;
3. There is no conflict with municipal roads and other facilities;
4, the project duration is tight.
Five Distribution Network Prefabricated Building Application Notes
1. Strengthen basic research work and introduce standardized design and pricing quotas for prefabricated building components of distribution networks;
2. Strengthen the quality control of prefabricated precast concrete parts;
3. Formulate assembly construction standardization construction process flow to guide on-site assembly;
4, to ensure the accuracy of prefabricated building installation location;
5. Consider the splicing gap waterproof and water seepage problems between prefabricated components.
Future development of six prefabricated buildings
Prefabricated buildings are still in the trial and promotion stage in the distribution network construction. Although they have been applied in the distribution network projects in some cities, they have not formed a comprehensive system of specifications, management methods and technical standards. With the in-depth research and application of prefabricated buildings in distribution network construction, we will form a more standardized and complete system for prefabricated buildings in design and construction, and promote prefabrication technology in distribution network construction projects. The promotion and application of the entire distribution network to improve the level of construction.
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