Reinforcement of Prefabricated Panel Houses in Ya'an

Multiple methods can be employed for reinforcing prefabricated panel houses in Ya'an, and an appropriate plan should be selected based on the actual situation of the house, with attention paid to construction details and subsequent maintenance.

I. Common Reinforcement Methods

1. Section Enlargement Reinforcement Method
   Add a post-cast layer of reinforced concrete with a thickness of no less than 40mm on the surface or bottom of the prefabricated panel to form a rigid floor. If pouring at the bottom of the panel, roughen the bottom surface and use the spraying method for construction to enhance the bonding strength between the new and old structures.

2. Carbon Fiber Sheet Bonding Reinforcement Method
   Bond carbon fiber sheets along the span direction of the panel to the tensioned part at the bottom of the panel using structural adhesive. Its advantages lie in its lightweight and high strength, which can improve the load-bearing capacity and stiffness while hardly increasing the weight of the original structure, making it suitable for scenarios with high space requirements.

3. Structural Load Path Modification Reinforcement Method
   Add beams and columns at the bottom of the prefabricated panel to reduce the panel's bending moment and improve the overall load-bearing capacity by adjusting the load transfer path. This method requires structural mechanics calculations to ensure that the newly added components work in coordination with the original structure.

4. Replacement of Prefabricated Panels
   Select high-strength and high-performance prefabricated panels to replace the original components, especially for weak connection points. Connection reinforcement bars can be added or joint details strengthened to improve the overall stability of the house.

5. Reinforcement After Opening Holes
   If holes need to be opened in the prefabricated panel, first conduct internal force analysis and load-bearing capacity verification, and then repair the stress concentration around the hole using methods such as bonding steel plates, adding reinforcing bars, or carbon fiber sheets.

6. Other Auxiliary Reinforcement Methods

• Grouting Reinforcement: Inject grout into walls or foundations to improve overall strength and seismic performance.
• Steel Mesh Reinforcement: Lay steel mesh on walls or floors to enhance crack resistance.
• Steel Plate Bonding Reinforcement: Bond steel plates to improve load-bearing capacity, suitable for repairing cracks or deformations.
• Foundation Reinforcement: Increase the foundation's load-bearing capacity by enlarging its size, deepening it, or adding steel mesh.
• Support Addition Reinforcement: Add supports to walls or roofs to prevent structural deformation.

II. Reinforcement Precautions

1. Material and Plan Selection
   Select reinforcement materials based on the functional requirements of the house (such as load-bearing and seismic resistance). For example, carbon fiber sheets or steel plates are preferred for insufficient load-bearing capacity; supports or steel structural collars can be added for seismic requirements.

2. Construction Quality Control
   Ensure complete bonding and uniform application of adhesive when bonding carbon fiber sheets; steel structural collars should be tightly connected and firmly fixed during installation. All procedures should be carried out by professional teams to avoid reinforcement failure due to construction defects.

3. Quality Inspection and Acceptance
   After reinforcement, use methods such as ultrasonic testing and radiographic testing to verify the quality and ensure it meets design requirements.

4. Environmental and Personnel Protection
   Control noise and dust pollution during construction and take measures such as enclosing and watering to reduce the impact on the surrounding environment.

5. Post-Maintenance Management
   Regularly inspect the reinforced parts and promptly address issues such as cracks and corrosion to extend the service life of the house.