Construction of Cement Prefabricated Houses in Haikou

The construction of cement prefabricated houses in Haikou needs to incorporate local climatic characteristics, utilizing standardized design and industrial production, and achieving efficient construction through scientific construction processes.

Technical Features and Structural Systems

Haikou has a tropical coastal climate, characterized by high humidity, heavy rainfall, and frequent typhoons, which impose high requirements on the building's moisture-proof, corrosion-resistant, and wind-resistant properties. The prefabricated integrated housing technology, through standardized design, industrial production, and modular construction, shortens the construction period by 40%-60% and offers the following advantages:

• Structural Stability: It often employs light steel frame structures or concrete prefabricated panel systems, combined with high-performance insulation materials (such as 75mm thick EPS sandwich cement panels with a thermal conductivity of ≤0.03W/m·k) and waterproof coatings, achieving dual goals of energy efficiency and wind resistance. For example, a project adopted a light steel structural load-bearing system with prefabricated cement composite panels for walls and roofs.
• Climate Adaptability:
  • Typhoon Resistance: The roof features a double-layer waterproof design, with eaves projecting ≤0.6m, and anti-wind columns installed at door and window openings for reinforcement; the connection spacing between roof panels and purlins is ≤300mm, with an anchoring force of ≥1.2 times the wind load.
  • Heat Prevention: An air insulation layer is added to the roof, and sunshade louvers are installed on the west-facing exterior walls.
  • Moisture-Proof and Drainage: The indoor floor is 0.3m higher than the outdoor level, with a 1% slope towards drainage ditches; ventilation holes are spaced 1.5m apart at the wall base.

Construction Process and Key Points

1. Foundation Engineering:
   • The axis deviation during surveying and setting out should be ≤±5mm, the excavation slope ratio for foundation trenches is 1:0.5, a C15 concrete cushion (100mm thick, with a flatness of ≤5mm/2m) is poured, and steel reinforcement mesh is bound while controlling the protective layer thickness.
2. Main Structure Installation:
   • The stability of the light steel structure needs to be verified (with a slenderness ratio of ≤200), and connection nodes should adopt double-bolt fixation (M12 bolts, grade 8.8); the connection spacing between roof panels and purlins is ≤300mm.
3. Material and Quality Control:
   • Cement Panels: The flexural strength should be ≥15MPa, the water absorption rate ≤12%, and flexural and impact resistance test reports are required.
   • Steel Structures: The yield strength should be ≥235MPa, the zinc layer thickness ≥85μm, and mechanical property and coating test reports are required.
   • Connectors: The tensile bearing capacity of expansion bolts should be ≥20kN, the displacement capacity of sealant ±25%, and the temperature resistance range -40~120℃.

Application Scenarios and Cases

Prefabricated integrated housing technology is suitable for scenarios such as residential housing, temporary offices, and tourism supporting facilities. For example, a production base in Haikou High-tech Zone has an annual production capacity of over 100,000 square meters, with products applied in local public buildings and rural revitalization projects, verifying their structural performance and environmental adaptability.