How to Fix Prefabricated Houses
The fixation of prefabricated houses should be tailored based on structural type, load requirements, and foundation conditions. Common fixation methods include the following six categories:
1. Structural Support and Frame Reinforcement
Enhance overall stability by adding metal components to distribute loads. For single-story or low-rise prefabricated houses, angle steel or steel beams can be installed at beam-column intersections, secured with bolts and treated for rust prevention. Using I-beams to form cross-shaped supports with columns can strengthen the rigidity of prefabricated panels. In areas with high seismic requirements, steel or aluminum alloy frames can be added to exterior walls, filled with reinforcing or sealing materials to improve lateral resistance.
2. Local Strengthening and Node Repair
Repair cracked or load-bearing-deficient sections of prefabricated panels. For crack repair, drill holes, insert steel bars, and pour concrete to form cast-in-place nodes, enhancing the connection between the floor slab and beams. For floor slab thickening, add a reinforced concrete layer of at least 40 mm thick on the surface and bottom to expand the cross-sectional area. Carbon fiber reinforcement involves粘贴 (pasting) carbon fiber sheets along the tensile direction of the floor slab, with anchor points set at the top, leveraging its high strength to improve bending resistance while being convenient and minimally invasive.
3. Foundation and Subgrade Reinforcement
Suitable for areas with foundation settlement or soft soil. Foundation reinforcement can be achieved by enlarging dimensions, deepening the foundation, adding steel mesh, or injecting reinforcing or sealing materials to enhance load-bearing capacity. Wall reinforcement involves pouring cement-based grout into the foundation or walls to fill voids and strengthen overall integrity, preventing deformation or cracks due to uneven settlement.
4. Material Reinforcement and Seismic Isolation Technology
Lay steel mesh on walls or floor slabs to increase overall strength and stability, preventing deformation or cracks. Seismic isolation technology reduces earthquake energy transmission by installing isolation bearings between the foundation and superstructure, but requires professional design implementation.
5. Structural Load Path Modification Reinforcement Method
Add beams and columns beneath prefabricated panels to transfer loads to new support structures, reducing panel bending moments and enhancing load-bearing capacity. This method is suitable for scenarios with excessive loads or unreasonable structural layouts.
6. Prefabricated Roof Panel Installation and Fixation
Substrate preparation involves cleaning dust and construction debris from roof supports, ensuring elevation errors do not exceed 10 mm, and adjusting pre-embedded parts or anchor bolts deviating by more than 2 cm in advance. Component inspection requires verifying each prefabricated panel for through cracks, chipped corners, exposed rebar, and checking the quality of fixing accessories. Installation and fixation should follow design requirements for positioning, ensuring panel seams align and connections are secure to avoid fixation failure due to construction errors.
