- Comparison of modular buildings and prefabricated slab buildings
The modular component has the characteristics of a space structural unit, with good mechanical performance and relatively economical design. Because the top plate of the modular component and the wall plate are cast as a whole, there is no problem of the shelf length of the floor, and the wall can be made thinner. The wall is assembled, but it is only a hollow wall, and the materials are still relatively economical.
In terms of component production, a modular component is a room with fewer specifications and models; for the same room, a prefabricated large slab needs to be composed of several components, such as inner wall panels, outer wall panels, and building slabs, with many specifications and models.
In the construction and installation, the module is a three-dimensional component, the hook can be loosened to stand firmly, and the connection generally only needs corner welding; while the large plate has many components and has many hanging times, it needs to be temporarily fixed with supports after it is in place, and then the cast-in-place joints are connected, There are many processes.
The modular components are large in size, heavy in weight, and require a large tonnage trailer, and the crane is used for pulling and hoisting; the large plate components are small in size, light in weight and small in the trailer, and the crane can be transported and hoisted.
2. Modular buildings compared to frame buildings
The frame structure uses a considerable amount of reinforced concrete in the beams, columns and floors, and its finished product is only a structural skeleton, and a lot of building decoration work such as wall masonry, internal and external wall plastering, etc. is required.
The amount of reinforced concrete in the modular structure is equivalent, but the building and the structure are combined into one, and the box wall is not only the envelope structure, but also works together with the corner columns and beams, which is economical and reasonable.
3. Comparative advantages of modular buildings and brick-concrete buildings
Construction features of modular components:
When building a house with modular components, more than 2/3 of the construction process can be completed in the factory, and only the module assembly, a small amount of decoration, and pipeline connection are left to operate on site, so about 80% of the work can not be affected by the climate. Large-scale industrial production. The total amount of labor is less, and labor conditions have improved.
The construction period is shortened by about 1/2 compared with other construction methods. The consumption of main materials is similar to or slightly lower than that of cast-in-place large formwork buildings. However, the investment in prefabricated factories of modular components is relatively large.
Load-bearing types of modular components:
According to their static load characteristics, they are divided into load-bearing members and non-load-bearing members.
Metal or wooden modular components are mostly used in one- or two-story houses or inlaid buildings with load-bearing skeletons. Plastic box components are only used for part of the house, such as kitchen, bathroom, toilet, etc., or for hanging buildings.
Modular components of reinforced concrete are widely used, and are commonly used in multi- and high-rise box-component houses.
In the United States, there are foldable modular houses developed from tourist cars and mobile houses, which can be used as construction site office buildings, dormitories or mobile repair workshops without the limitation of width by road transport