Connection of Prefabricated Assembly Houses

The core of connecting prefabricated assembly houses lies in achieving reliable connections between components and overall structural stability through standardized design, factory-based production, and assembly construction. The specific technical points are as follows:

1. Connection Technology Types

1. Dry Connection: This includes welding and bolt connections (such as high-strength bolts), commonly used for connecting double-T panels to supporting structures. For example, double-T panels are welded or bolted to supporting beams through pre-embedded steel plates at the rib bottom, although this may increase the structural floor height and slightly weaken overall integrity.
2. Wet Connection: Represented by grout sleeve connections, this method achieves a firm bond between components by filling with concrete grout, significantly enhancing overall seismic performance and suitable for scenarios with high structural stability requirements.
3. Tongue-and-Groove Connection: This involves creating concave-convex fits by grooving components (such as connecting double-T panels to supporting structures), utilizing mechanical interlocking to improve connection stability and reduce displacement risks.
4. Steel Embedded Connectors: Pre-embedded metal connectors are fitted with supporting structures, enhancing strength through rigid connections between metal parts, suitable for high-load or complex stress environments.

2. Waterproofing and Sealing Treatment

During component production, structures such as water stops and sealing grooves are reserved. High-elasticity sealant is used to fill joints during installation, with some projects adopting double-layer waterproofing designs. Factory-prefabricated high-precision components (such as ±2mm error control) reduce joint gaps, minimizing water leakage risks from the source and ensuring long-term durability.

3. Sound Insulation and Thermal Insulation Connection

1. Sound Insulation: Walls adopt composite structures filled with sound-absorbing cotton or aerated concrete, with joints sealed with sealing materials. Sound insulation levels can meet national standards (such as above 45 decibels).
2. Thermal Insulation: External wall insulation layers are prefabricated integrally with walls in factories, avoiding issues like detachment or hollowing in traditional construction, effectively maintaining stable indoor temperatures and reducing energy consumption.

4. Seismic Performance Guarantee

Components are connected to form an overall structure through high-strength bolts or grout sleeves, dispersing energy through connection nodes during earthquakes and reducing local damage. Most prefabricated buildings must pass seismic tests and comply with local seismic fortification standards (such as 8-degree fortification requirements).

5. Construction Process Control

Connection quality relies on standardized execution: Metal connectors must have nodes locked to prevent loosening; sealant filling must be uniform without omissions to avoid leakage; component lifting must strictly calibrate axes and elevations to ensure connection accuracy. Fine operations during the construction phase are key to ensuring overall stability and durability.

The connection technology of prefabricated assembly houses achieves a balance between structural safety, functional completeness, and living comfort through multi-dimensional optimization, representing an important aspect of modern building industrialization.