How to Reinforce Prefabricated Houses

Reinforcing prefabricated houses can be achieved through comprehensive measures involving foundations, structures, frames, and more. The specific methods are as follows:

Foundation Reinforcement

The foundation is the core of a house's stability, and reinforcement requires enhancing its load-bearing and seismic resistance capabilities. Increasing the foundation size or deepening the foundation can disperse the upper loads and reduce the pressure on the ground. Adding steel reinforcement mesh can enhance the overall integrity of the foundation and prevent local damage. Additionally, injecting reinforcement agents or foundation sealing materials can fill voids, improve density, and enhance seismic performance.

Structural Reinforcement

For key components such as walls, stairs, and roofs, it is necessary to enhance overall strength and stiffness.

• Adding steel components: Install steel beams, columns, or plates on walls, stairs, and roofs to form a steel structural support system, enhancing lateral resistance.
• Internal wall reinforcement: Injecting reinforced concrete can significantly improve the seismic performance of walls, especially for older prefabricated houses.
• Floor reinforcement: If the load increase is minimal, carbon fiber can be pasted on the underside of hollow slabs or steel beams can be added to change the load-bearing mode. If a substantial increase in load-bearing capacity is required, the floor section enlargement method can be adopted, which involves adding a reinforced concrete adhesive layer of no less than 40 millimeters thick on the surface and underside of the prefabricated floor to form a composite structure.
• Steel plate bonding reinforcement method: Bond steel plates to cracks in walls or floors using structural adhesive to transfer stress and enhance load-bearing capacity. However, attention must be paid to the coordinated work between the steel plate and concrete to avoid detachment.

Frame Reinforcement

Installing a metal frame on the exterior walls of the house can form an overall restraint system and enhance lateral stiffness. Reinforcement agents or sealing materials can be injected into the frame structure to fill gaps and strengthen node connections, improving seismic resistance.

Seismic Isolation Reinforcement

By installing seismic isolation devices such as spring isolators or rubber isolators in the foundation or structure, earthquake energy can be effectively isolated. The isolation layer can reduce the transmission of horizontal and vertical seismic forces, decrease the amplitude of house vibrations, and protect structural safety.

Other Reinforcement Methods

• Grouting reinforcement method: Inject cement-based or chemical grouting materials into cracks in walls or foundations to fill voids and enhance overall integrity, preventing deformation expansion.
• Steel reinforcement mesh method: Lay steel reinforcement mesh on the surface of walls or floors and form a protective layer by spraying concrete to enhance crack resistance and load-bearing capacity.
• Additional support reinforcement method: Install diagonal braces, horizontal braces, and other support components on walls or roofs to disperse loads and limit deformation, suitable for areas with insufficient local stability.