How to apply bim in prefabricated buildings and what are its advantages?

Advantages and disadvantages of prefabricated buildings: 1. Save energy. Because the 50-thick extruded board is sandwiched between the concrete on both sides of the external board, its thermal insulation performance is the same as that of the external insulation or internal insulation of the traditional building external wall, which solves the problem that the external insulation belt of the traditional building has fallen off the external wall decoration; Second, environmental protection. Because of the factory production, the amount of construction waste in the construction site is reduced, which is more environmentally friendly; Third, save the template. Because the laminated plate is used as the outer plate of floor bottom formwork, the laminated plate is used as the side formwork of shear wall, which saves the formwork. Fourth, shorten the construction period. Because the output of measuring wallboard and prefabricated laminated board is reduced, the intensity of on-site construction is reduced, and even the masonry and plastering processes are omitted, and the overall construction period is shortened; 5. Need accurate lofting. Accurate height measurement is needed. Due to factory production, the size of prefabricated components has been fixed. There is deviation in the setting-out dimension of prefabricated members, which leads to deviation in flat-fell seam erection. It is more troublesome to control the installation elevation of composite slab or calculate the vertical strip between composite slab and shear wall than to re-formwork the joint. Because of the concrete structure, the prefabricated buildings that require high accuracy of land and reserved holes are required to be as accurate as possible, otherwise it will increase the construction difficulty and even affect the structure; The splayed seam between the bottom of the paint and the wooden board is easy to fall off. According to the field observation, the splayed seam between two slabs of precast slab is splayed. Although jointing with anti-crack mortar, it is easy to fall off. Therefore, it is suggested that the precast slab should be changed into a splayed joint between two slabs, and the laminated slab should be cast in situ. Well, the size of prefabricated components is fixed, and the gap or uniformity is assembled. Although prefabricated components can be fixed in the factory, the dimensional deviation is the same as the gap or uniformity caused by site construction errors; 9. Design of assembled building outer plate with water-stop strip for outer plate Flat floor with water-stop strip High-rise plate 200 No water-stop strip without water-stop strip for outer plate Although the outer joint is treated with weather-resistant glue, it is suggested that all outer plates should be sealed with water-stop strip; 0. Some wooden bricks are not embedded in the door frame, which makes it difficult for users to decorate or install the door. It is suggested that the prefabricated door of the interior wall should be embedded in the door frame for users' decoration. 1 1. If the exterior wall joints are replaced with weather-resistant glue, even if the service life of the weather-resistant glue is 30%, it is very convenient to replace the weather-resistant glue. 12. The cost of prefabricated building projects is higher than that of traditional building projects. The floor thickness of traditional buildings is about 100. The thickness of precast building floor is 0. Thickness of laminated plate plus 0. The total thickness of cast-in-place slab is 140. Ultra-traditional building floor thickness; The connection between the hanging plate of the external wall and the shear wall increases the thickness of the external wall, which leads to the increase of the material web and the increase of the cost. The increase of the thickness of the external wall leads to the same building area of users, and the clearance area of prefabricated buildings is higher than that of traditional buildings, resulting in the square meter cost of prefabricated buildings being more expensive than that of traditional buildings, which is easily accepted by consumers. 13. The cost management department can follow up the independent price of the manufacturer. The manufacturer decides the situation. I'm still in the development stage of new things. The cost management department can actually follow up the phenomenon of vendor independence. The cost is determined by the manufacturer, which is beneficial to the development of prefabricated buildings; 14. When the outer slab is used as the outer formwork of shear wall, fewer screw holes are reserved, and the phenomenon that the concrete outer slab moves outward is less. In the construction of prefabricated building shear wall, the rigidity of the whole formwork system is enough, which leads to the outward deviation of the concrete outer plate of the construction shear wall and the leveling of the outer wall. 5. There are hidden dangers in aerial work outside the frame. Traditional builders of building outriggers have become accustomed to the construction environment of outriggers. Outside the frame construction personnel are familiar with the process and can consciously issue some illegal operations, leading to hidden dangers.