Renovation of Bearing Beams in Prefabricated Slab Houses
The renovation of bearing beams in prefabricated slab houses must strictly adhere to structural safety principles, ensuring safety through professional assessment, scientific reinforcement, and standardized construction.
1. Preliminary Assessment and Plan Formulation
Before renovation, it is essential to commission a qualified professional institution to conduct a comprehensive inspection of the house's bearing structure, focusing on issues such as cracks, deformation, and steel bar corrosion in the prefabricated slabs, and assessing their remaining load-bearing capacity. If the load-bearing capacity of the prefabricated slabs is found to be insufficient, reinforcement must be prioritized, such as using carbon fiber sheets or steel plate bonding for localized damage areas. Based on the inspection results and renovation needs (e.g., increasing loads or altering spatial layouts), a professional structural engineer should design the renovation plan, specifying the scope of demolition, reinforcement methods, and load limits. It is strictly prohibited to demolish walls or increase loads without assessment, as this may lead to structural instability or even collapse.
2. Reinforcement Measures for Bearing Structures
For prefabricated slabs or bearing beams with safety hazards, reinforcement methods should be selected based on the degree of damage:
- Carbon Fiber Sheet Reinforcement: Suitable for crack repair or load-bearing capacity enhancement, high-strength carbon fiber sheets are bonded to the structural surface with epoxy resin to improve bending and shear resistance.
- Steel Plate Bonding Reinforcement: Steel plates are bonded to the bottom of prefabricated slabs or the sides of beams using structural adhesive to work in tandem with the original components, suitable for cases of severe load-bearing deficiency.
- Adding Support Beams: Concrete or steel support beams are added at the mid-span of prefabricated slabs to distribute loads to new support points, reducing stress on the original components.
All reinforcement plans must be designed by professional engineers and executed by construction teams with special engineering qualifications to ensure material quality and construction techniques comply with standards. If demolition of prefabricated slabs or bearing beams is involved, a temporary support plan must be prepared in advance to prevent structural instability during construction.
3. Construction Specifications and Acceptance Requirements
Renovation construction should follow the sequence of “structural reinforcement → waterproofing → pipeline installation → filling and backfilling → decoration” to avoid damaging completed work through cross-operations. For concealed works (e.g., water and electricity lines, waterproof layers), visual records should be kept, and acceptance and signing by both the owner and supervisor are required before covering. For example, the steel bar binding and concrete pouring of newly added support beams should be supervised throughout to ensure strength compliance; waterproof layers should undergo a closed water test after construction to prevent leakage affecting structural durability. During construction, it is strictly prohibited to stack heavy objects or concentrate loads on bearing structures to avoid local stress exceeding limits and causing damage.
The renovation of bearing beams in prefabricated slab houses involves structural safety and must be based on professional assessment, centered on scientific reinforcement, and guaranteed by standardized construction. Negligence in any step may lead to serious consequences. It is recommended that owners supervise the entire process and commission a third-party institution for acceptance.
