What is the Structure of a Prefabricated Slab House?
The structure of a prefabricated slab house is typically either a brick-concrete structure or a reinforced concrete prefabricated component structure, using prefabricated concrete slabs as the main load-bearing or enclosure components.
Application of Prefabricated Slabs in Brick-Concrete Structures
In common brick-concrete structures, prefabricated slab houses use prefabricated concrete slabs as floor slabs, with walls mostly constructed from brick masonry. In this structural form, brick walls bear vertical loads and some horizontal loads, while prefabricated slabs serve as horizontal load-bearing components, transferring floor loads to the walls. Prefabricated slabs are usually factory-prefabricated cement components, divided into solid and hollow types: solid slabs have higher strength and are suitable for areas with heavy loads; hollow slabs reduce their own weight through internal holes while maintaining sufficient load-bearing capacity, widely used in residential floors. The connection between walls and prefabricated slabs is achieved through reserved reinforcement or mortar bedding to ensure structural integrity.
Reinforced Concrete Prefabricated Component Structures
Some prefabricated slab houses adopt a fully prefabricated component system, where floor slabs, ring beams, and structural columns are all prefabricated in the factory and assembled on-site through bolting or welding. In this structure, the treatment of joints between prefabricated components is particularly crucial, requiring reliable connection techniques (such as welding of embedded parts, high-strength bolt fixation) to ensure the collaborative working capacity between components. The prefabrication of structural columns and ring beams improves construction efficiency, and by reasonably designing joints, it can meet seismic fortification requirements. This type of structure is commonly found in industrialized housing or temporary buildings, characterized by fast construction speed and high standardization.
Types and Characteristics of Prefabricated Slabs
As core components, the type of prefabricated slabs directly affects the performance of the house. Solid slabs, with no internal holes, have high flexural rigidity and are suitable for scenarios with small spans or heavy loads; hollow slabs optimize hole layouts (such as circular or rectangular holes) to reduce self-weight while ensuring load-bearing capacity, lowering transportation and installation costs. Additionally, the surface treatment of prefabricated slabs (such as polishing, roughening) affects the bonding performance with subsequent finishing layers and needs to be selected according to usage requirements.
Structural Advantages and Limitations
The advantages of prefabricated slab houses lie in their short construction period and high degree of industrialization, making them particularly suitable for large-scale standardized construction. However, it should be noted that if the connection between prefabricated slabs and walls in brick-concrete structures is not properly handled, it may affect structural integrity; fully prefabricated component structures have strict requirements for joint design and require experimental verification of connection reliability. Furthermore, the span of prefabricated slabs is limited, and large-space houses need to be combined with other structural forms (such as frame structures) for use.
