Laying of Prefabricated Floor Panels for Houses
The laying of prefabricated floor panels for houses should be carried out using appropriate methods based on specific scenarios and purposes, with attention paid to structural safety and moisture-proof treatment.
Laying of Prefabricated Panel Houses
Prefabricated panel houses use prefabricated panels as their main components. These panels are factory-made concrete components available in solid and hollow types. This form of construction originated in the early 20th century, and many residential buildings constructed in China before 1985 adopted this structure. During factory production, wooden molds are nailed together, steel bars are arranged, and concrete is poured to form the prefabricated panels, which are then transported to the site for laying and installation to construct the main structure of the house.
Laying of Prefabricated Panel Suspended Floors for Moisture-Proofing in the Foundations of Rural Self-Built Houses
The principle involves leaving a cavity of 30 - 50 centimeters between the foundation and the ground floor. Underground moisture rises into the cavity and dissipates, unable to reach the ground floor, thus preventing dampness on the ground floor. The specific method is to control the height of the backfill soil at a distance of 30 - 50 centimeters from the ground after the ground beam is poured, compact the backfill soil, and then lay the prefabricated panels on this suspended floor.
Laying of Prefabricated Panels on Suspended Floors in Rural Self-Built Houses
After removing the formwork of the ground ring beam, use a level to measure the positions of various points. For positions that need adjustment, use concrete for leveling and preparation for laying the prefabricated panels. Meanwhile, the price of prefabricated panels is calculated per meter, with different prices for different lengths. Panels shorter than 4 meters and those 4 meters or longer have different prices.
Laying Floor Tiles in 30-Year-Old Prefabricated Panel Buildings
- Risks of Direct Laying: After 30 years of use, the structural performance of prefabricated panels may decline due to material aging and long-term loading. If floor tiles are laid directly without reinforcement, when the prefabricated panels have a large span and no crossbars are set or the steel bars are thin, their load-bearing capacity will significantly decrease. The increased weight after laying floor tiles may cause the prefabricated panels to shake, leading to soft, raised, or cracked floor tiles. Some prefabricated panels may sag in the middle, and direct laying of floor tiles will exacerbate the structural burden, even leading to the risk of local collapse. If the prefabricated panels already have obvious cracks, deformation, or steel bar corrosion, the risks of direct laying are even higher.
- Conditions for Safe Laying after Reinforcement: Through professional reinforcement methods such as "cross"-shaped small beam reinforcement (pouring "cross"-shaped small beams with reinforced concrete below the prefabricated panels to disperse the load and enhance the overall integrity) and steel beam support (using steel beams to support the prefabricated panels and reduce the stress concentration on individual panels), the load-bearing capacity of the prefabricated panel building can be improved, enabling safe laying of floor tiles.
- Recommendations for Professional Inspection and Repair: It is recommended to entrust a professional institution to conduct a comprehensive inspection of the building structure, focusing on evaluating the load-bearing capacity of the prefabricated panels, the corrosion of steel bars, and whether there is sagging. If minor problems (such as local cracks) are detected during the inspection, they can be solved through repair and reinforcement. If there are serious structural problems (such as overall deformation and severe steel bar corrosion), overall reconstruction should be considered.
