How to Renovate a Prefabricated Structure House
The renovation of a prefabricated structure house requires formulating a plan based on the specific conditions of the house, generally including four aspects: structural safety assessment, development of a reinforcement plan, functional upgrades, and construction sequence.
Structural Safety Assessment: Before renovation, it is necessary to engage a professional team to conduct a comprehensive structural safety assessment of the house. Focus on inspecting the width of cracks at the production sites of prefabricated panels; special treatment is required if the width exceeds 0.3 millimeters. Check the connection status between prefabricated panels and ring beams; if the bolt corrosion rate exceeds 30%, replacement is necessary. Simultaneously, inspect the walls for cracks, the steel bars for rust, and the foundation for subsidence. Through a comprehensive assessment, clarify the structural issues present in the house to provide a basis for subsequent renovations.
Development of a Reinforcement Plan: Formulate a targeted reinforcement plan based on the assessment results. For wall cracks, if they are minor, grouting repair can be used; if they are severe, steel plate reinforcement is required. For roof leakage issues, a new waterproof layer needs to be applied; if the foundation is unstable, pile driving reinforcement is necessary. For the board joint positions detected during the structural inspection, the original filling material needs to be removed, No. 6 deformed steel bars should be implanted, and C30 fine aggregate concrete should be poured. Additionally, constructural columns should be added at the four corners of the house, with a typical cross-section of 240240 millimeters, paired with No. 6 and No. 8 steel bars tied together and connected to the floor slab. During the construction preparation phase, a temporary support system should be erected, with steel pipe supports placed every 1.2 meters along the length of the prefabricated panels. Critical nodes should use H-shaped steel beams to replace the steel beams, with a steel beam cross-section greater than or equal to 200200 millimeters.
Functional Upgrades: On the basis of ensuring structural safety, functional upgrades to the house can be carried out. Sound Insulation: Using soundproof panels and double-glazed windows can improve sound insulation by 70%. Waterproofing and Structural Durability: After removing the original wooden roof, a new concrete roof should be poured at the original height to ensure waterproofing and structural durability and stability, and to meet the requirements for laying various roofing materials after renovation. After removing the entire original exterior wall tiles, the exterior walls should be repainted and reinforced with steel bar grouting to enhance the load-bearing strength and tensile properties of the original walls.
Construction Sequence: During construction, adopt the principle of starting from the middle and moving to the sides, carrying out segmented demolition and cutting while maintaining symmetrical demolition. The daily demolition volume should not exceed 30% of the total floor area. During the demolition process, real-time monitoring of stress changes in the support system is necessary. The use of heavy hammer impact demolition is prohibited to avoid shock and damage to the foundation structure.
