Reinforcement Plan for Prefabricated Slab Houses

The reinforcement plan for prefabricated slab houses mainly includes the following methods:

I. Foundation and Overall Structural Reinforcement

1. Grouting Reinforcement Method: By injecting cement-based grouting materials into walls or foundations, pores and cracks are filled, enhancing the overall strength and stability of the structure. This method is particularly suitable for addressing insufficient load-bearing capacity due to foundation settlement or loose walls.
2. Foundation Reinforcement: Enhancing the load-bearing capacity of the foundation by increasing its base area, deepening its depth, or adding steel reinforcement meshes. Additionally, reinforcement agents or sealing materials can be added to improve seismic resistance, suitable for houses with insufficient foundation load-bearing capacity or complex geological conditions.
3. Section Enlargement Reinforcement Method: Adding a reinforced concrete overlay of no less than 40mm thickness to the surface or bottom of prefabricated slabs, forming a rigid floor or roof cover, and enhancing the overall stiffness of the structure. This method is suitable for situations where the floor load-bearing capacity is insufficient or deformation is significant.

II. Local Component Reinforcement

1. Steel Reinforcement Mesh Method: Laying steel reinforcement meshes on the surface of walls or floors and covering them with shotcrete or plaster to enhance the crack resistance and integrity of components, suitable for scenarios where walls are cracked or floor deflections exceed limits.
2. Steel Plate Bonding Reinforcement Method: Using structural adhesive to bond steel plates to cracked or deformed areas of walls or floors, utilizing the high strength of steel plates to enhance the load-bearing capacity of components, suitable for components with severe local damage but still retaining structural function.
3. Carbon Fiber Sheet Bonding Reinforcement Method: Bonding carbon fiber sheets to the tension zone at the bottom of slabs using epoxy resin, utilizing their high strength and lightweight properties to improve the flexural load-bearing capacity of floors without increasing the original structural weight, suitable for reinforcement scenarios sensitive to self-weight.

III. Structural System Optimization Reinforcement

1. Load Path Modification Reinforcement Method: Adding beams and columns beneath prefabricated slabs to transfer floor loads through newly added components to the foundation, reducing the bending moment of the original slab, suitable for floors with excessive spans or concentrated loads.
2. Support Addition Reinforcement Method: Enhancing the stability of walls or roofs by adding diagonal braces, steel columns, and other support structures, suitable for large-space structures or houses with significant lateral loads.

IV. Targeted Reinforcement for Special Issues

1. Post-Opening Reinforcement: Conducting internal force analysis and load-bearing capacity verification for floors after openings are made, and reinforcing the surrounding area of the opening with methods such as steel plate bonding, beam addition, or carbon fiber sheet application to ensure structural safety.
2. Under-Floor Reinforcement for Panel Buildings: Adding steel support structures beneath floors, such as arranging H-shaped steel along the four corners, to enhance floor stability, suitable for addressing local deflection issues in old panel buildings.

Precautions: Before reinforcement, structural inspection and assessment should be conducted to select appropriate reinforcement methods. During construction, strict control over material quality and process details, such as grouting pressure and the flatness of carbon fiber sheet bonding, should be maintained. After reinforcement, load-bearing capacity tests and long-term monitoring should be carried out to ensure the effectiveness meets standards.