Reinforcement of Prefabricated Slab Houses in Changge City

Multiple scientific methods can be employed for the reinforcement of prefabricated slab houses in Changge City, which should be selected comprehensively based on the structural characteristics, damage degree, and usage requirements of the houses, while strictly adhering to construction specifications and acceptance standards.

I. Common Reinforcement Methods

1. Section Enlargement Reinforcement Method
   By adding a post-poured layer of reinforced concrete with a thickness of no less than 40mm on the surface or bottom of the prefabricated slab, a rigid floor system is formed. If pouring is chosen at the bottom of the slab, roughening treatment of the slab bottom is required, and the spraying method should be used for construction to enhance the bonding strength between the new and old structures. This method can significantly improve structural stiffness and is suitable for floors with insufficient load-bearing capacity.

2. Carbon Fiber Sheet Bonding Reinforcement Method
   Structural adhesive is used to bond carbon fiber sheets along the span direction to the tension zone at the bottom of the slab. Carbon fiber sheets are lightweight and have high strength, which can improve the load-bearing capacity of the structure without substantially increasing the weight of the original member. This method is suitable for scenarios where maintaining the building's appearance or reducing load increase is required.

3. Structural Load Path Modification Reinforcement Method
   A beam-column system is added at the bottom of the prefabricated slab to disperse the load and reduce the slab's bending moment. This method requires adjustment in combination with the building layout and is suitable for areas with large spans or concentrated loads.

4. Steel Plate Bonding Reinforcement Method
   Steel plates are bonded to cracks in walls or floors to enhance the load-bearing capacity through the coordinated work of the steel plates and the original structure. During construction, it is necessary to ensure that the steel plates are flat, the adhesive is applied evenly, and they are fixed with bolts or welding.

5. Foundation Reinforcement
   For issues such as foundation settlement or insufficient load-bearing capacity, methods such as increasing the foundation size, deepening the foundation, or adding steel mesh can be adopted. If the foundation is a weak soil layer, chemical grout can be injected to solidify the soil and improve overall stability.

II. Construction Precautions

1. Material and Process Selection
   Select materials based on the reinforcement objectives: carbon fiber sheets or steel plates are preferred for insufficient load-bearing capacity; additional supports or steel structural collars can be added for seismic requirements; steel support structures are recommended when space is limited.

2. Construction Quality Control
   When bonding carbon fiber sheets, ensure there are no air bubbles or wrinkles; the installation of steel structural collars should closely fit the floor; during grouting reinforcement, control the grout mix ratio and injection pressure to avoid secondary damage to the structure.

3. Environmental and Safety Management
   Delineate the work area before construction and set up protective barriers; take noise reduction and dust suppression measures to minimize the impact on surrounding residents; wear safety harnesses for high-altitude work and assign full-time safety officers for supervision.

III. Post-Reinforcement Management

1. Quality Acceptance
   Use ultrasonic testing, load testing, and other methods to verify the reinforcement effect, ensuring that load-bearing capacity, deformation, and other indicators meet design requirements.

2. Long-Term Maintenance
   Regularly inspect whether the connectors at the reinforcement sites are loose, whether the carbon fiber sheets are delaminating, and whether the steel plates are rusting; establish a maintenance file to record inspection data and treatment measures.

Tip: Reinforcement of prefabricated slab houses should be carried out by a professional team for structural assessment and the development of a personalized plan. Relevant approval procedures should be completed before construction to ensure compliance.