How to Fix Prefabricated House Assembly

When fixing the assembly of a prefabricated house, it is essential to focus on key aspects such as base treatment, bottom support and joint treatment of panels, connecting them into a whole, and reinforcement measures. The specific operations are as follows:

1. Base Treatment: Ensure a Flat and Dense Contact Surface
The top surface of the load-bearing wall serves as the foundation for installing prefabricated panels, and its flatness directly affects structural stability. Before construction, clean the top surface of the wall, removing dust, loose particles, and other impurities. Wet the top of the wall with water the day before lifting, but avoid accumulating standing water to prevent dilution of the mortar, which could affect its strength. Subsequently, use high-grade cement mortar (such as M15 or above) for leveling. The mortar should cover the entire contact surface evenly with a uniform thickness (generally controlled between 20-30mm). After placing the prefabricated panels, gently vibrate or manually compact them to allow the mortar to fully fill the gaps beneath the panels, creating a 'face-to-face' contact. This prevents cracking of the panel joints or uneven local stress-induced shaking caused by an uneven wall surface.

2. Bottom Support and Joint Treatment of Panels: Prevent Deformation and Leakage
During installation, temporary supports (such as wooden beams or steel brackets) should be placed beneath the prefabricated panels. The spacing between support points should not exceed 1.5 meters to ensure that the panels are not bent or cracked before the concrete reaches full strength (usually requiring curing for 7-14 days). Panel joints are weak points in the structure and should be filled with specialized sealing materials (such as polyurethane foam or waterproof mortar) according to design requirements. When the joint width exceeds 20mm, steel bars or wire mesh should be embedded for reinforcement. For roof panels, waterproof membranes should be laid or waterproof coatings applied within the joints to prevent rainwater leakage.

3. Connecting into a Whole: Strengthen Structural Synergy
The core of installing prefabricated panels is to connect individual panels into a whole using professional techniques. When connecting panels to walls, steel bars can be pre-embedded in the wall top or connectors installed. The steel bars within the prefabricated panels are then tied or welded to the wall steel bars to form reliable anchoring. Panels should be fixed to each other using cast-in-place concrete strips (such as post-pour strips) or mechanical connectors (such as bolts or fasteners) to ensure uniform load transfer. Construction teams should avoid merely placing the panels and should eliminate the 'loose' state through techniques such as tie bars and welding to prevent displacement or detachment under earthquake or wind loads.

4. Reinforcement Measures: Enhance the Stability of Existing Houses
For existing prefabricated houses, reinforcement methods can be selected based on the degree of damage:

• Grouting Reinforcement Method: Inject cement-based or chemical grouting materials under pressure to fill voids in walls or foundations, enhancing overall integrity.
• Steel Mesh Reinforcement Method: Lay steel mesh on the wall surface and spray concrete to improve seismic performance.
• Steel Plate Bonding Reinforcement Method: Use structural adhesive to bond steel plates to cracked or deformed areas to restore structural load-bearing capacity.
• Additional Support Reinforcement Method: Install steel supports or concrete columns at key locations to improve overall stability.

All these steps must strictly adhere to design specifications and construction standards to ensure that the fixing of the prefabricated house meets safety and durability requirements.