Mianyang Prefabricated Slab House Reinforcement
Reinforcement of prefabricated slab houses in Mianyang can address the issue of insufficient bearing length by adding angle steel supports and tie bolts, or by using reinforcement techniques such as carbon fiber, steel bonding, and post-installed rebar, depending on the actual condition of the house.
If the prefabricated slab houses in Mianyang have insufficient bearing length, angle steel supports can be added on both sides of the slab joints. During specific operations, the specifications and spacing of the angle steel should be determined based on the structural characteristics of the house. Commonly used angle steel specifications such as L50×5 or L63×6 are typically selected and installed at intervals (e.g., 500-800mm) along the direction of the slab joints. The contact surface between the angle steel and the prefabricated slab should be polished flat to ensure a tight fit and fixed to the original structure with expansion bolts or chemical anchors to form a reliable support system. Drilling holes at intervals and installing tie bolts is a crucial step to enhance overall integrity. Holes should be drilled at corresponding positions on the angle steel, and high-strength bolts (e.g., M12 or M16) should be inserted and tightened with nuts to create a tie effect, effectively transferring loads and limiting relative displacement between slabs. This method is suitable for addressing local bearing capacity reduction caused by insufficient bearing length, with a short construction period and low cost. However, it is essential to ensure that the materials of the angle steel and bolts meet design requirements to avoid safety hazards caused by insufficient material performance.
Carbon fiber reinforcement technology enhances the flexural and shear resistance of structures by bonding carbon fiber sheets or plates, suitable for repairing cracks in prefabricated slabs or reinforcing insufficient bearing capacity. During construction, the base layer should be polished and leveled, and a special primer should be applied before bonding the carbon fiber material, which is then protected with a topcoat. This method is lightweight and highly corrosion-resistant but requires strict control over bonding quality to avoid voids or delamination. Steel bonding reinforcement involves bonding steel plates to prefabricated slabs with structural adhesive to form a composite structure, suitable for scenarios requiring significant increases in bearing capacity. The thickness of the steel plates is usually 4-8mm, and the specifications should be determined based on calculations. During construction, the surface of the steel plates should be derusted to ensure a uniform and full adhesive layer. Post-installed rebar reinforcement involves drilling holes in prefabricated slabs or walls, cleaning the holes, injecting adhesive, and inserting rebar to form new anchorage connections, suitable for reinforcing new components or structural nodes. The depth of the rebar installation should meet design requirements (e.g., 15d-20d, where d is the diameter of the rebar), and pull-out tests should be conducted after the adhesive cures to verify the anchorage effect.
The selection of reinforcement solutions should comprehensively consider the degree of house damage, usage requirements, and budget. It is recommended to entrust a professional reinforcement company with structural inspection and solution design to ensure that the reinforcement measures are scientifically reasonable and safe and reliable.
