The Roof of a Prefabricated Panel House Can Be Poured

The roof of a prefabricated panel house can be poured under specific circumstances. The following provides a detailed explanation from the perspectives of feasible scenarios and precautions:

Feasible Scenarios:
In rural self-built houses, it is common to use prefabricated panels for the first floor and cast-in-place roofs for the second floor. This design not only takes advantage of the rapid construction speed of prefabricated panels but also compensates for their shortcomings through the cast-in-place roof. For example, when used alone, prefabricated panels result in poor overall structural integrity of the house and are prone to leakage at the joints. In contrast, a cast-in-place roof forms a continuous structure, enhancing the overall integrity and waterproofing performance of the house. Additionally, for older rural prefabricated panel houses, if the original structure includes load-bearing components such as columns, beams, and cantilever beams, a layer of cast-in-place slab can be added on top of the prefabricated panels. This method not only improves the toughness and hardness of the floor slab but also saves on construction costs for carpentry formwork and scaffolding, achieving the dual goals of structural reinforcement and cost-effectiveness.

Precautions:

1. Structural Connection Treatment: Before pouring concrete, use an electric pick to chisel a certain width and height of the wall surface immediately above the prefabricated panels, allowing the newly added steel bars and concrete to be embedded into the existing wall and forming a reliable connection. This step prevents the disconnection between the old and new structures and ensures the continuity of load transfer.
2. Reinforcement Configuration Enhancement: During floor slab construction, in addition to binding a two-way steel bar mesh according to specifications, radial reinforcement should also be added. The radial reinforcement is arranged radially from the joint of the prefabricated panels, effectively dispersing concentrated loads, reducing the direct load-bearing pressure on the prefabricated panels, and preventing cracking due to excessive local stress.
3. Load Calculation Verification: Before pouring, a professional institution should be commissioned to verify the load-bearing capacity of the original prefabricated panels and supporting structures to ensure that the weight of the newly added cast-in-place layer does not exceed the design allowable value. If the load-bearing capacity of the original structure is insufficient, reinforcement measures (such as adding columns or beams) should be taken before pouring.

Through scientific design and standardized construction, pouring a cast-in-place layer on the roof of a prefabricated panel house can significantly enhance structural safety and functionality. However, it is essential to strictly adhere to technical requirements to avoid quality issues caused by improper operation.