Prefabricated House Assembly Construction Plan

The prefabricated house assembly construction plan should develop differentiated processes based on structural types (such as concrete, prefabricated residential buildings, light steel structures, etc.). The core stages include design, production, transportation, installation, and quality control. Below is a general framework and key points:

I. Design Phase

1. Design Principles: It should meet the functional requirements of the building, ensure structural safety and stability, and adhere to green building concepts (such as reducing energy consumption). The design should consider the convenience of construction, transportation, and installation, promoting standardized and modular production.
2. Design Content: It covers architectural plan and elevation design, structural design, equipment selection, and material choice. For example, the design of component connection nodes should be clarified for prefabricated concrete structures, and the layout of steel components should be optimized for light steel structures to reduce on-site welding.

II. Production Phase

1. Production Process: It includes the production, assembly, inspection, and packaging of prefabricated components. For example, concrete components need to be cast in molds and cured to form; light steel structural components need to be cut, drilled, and anti-corrosion treated in the factory.
2. Production Requirements: The dimensional accuracy of components should meet standards (e.g., error ≤ 3mm), with no cracks, honeycombs, or other defects on the surface; the strength of connection nodes should be verified through tests (e.g., the tensile strength of bolts ≥ 1.2 times the design value).

III. Transportation Phase

1. Transportation Methods: Choose flatbed trucks, trailers, or specialized transportation racks based on the type of components. For example, extended trailers should be used for extra-long laminated slabs, and light steel structural components can be stacked and transported in layers.
2. Transportation Requirements: Components should be secured to prevent sliding, and congested routes should be avoided; transportation vehicles should be regularly maintained to ensure reliable braking systems.

IV. Installation Phase

1. Installation Process: It includes on-site preparation (such as surveying and setting out, foundation treatment), component lifting (using tower cranes or truck cranes), connection (such as bolt tightening, welding), and adjustment (levelness and perpendicularity correction).
2. Key Technologies:
   • Concrete Structures: Use sleeve grouting connections or grout-anchor connections to ensure node compactness ≥ 95%.
   • Light Steel Structures: Connect through high-strength bolts or self-tapping screws, controlling torque values (e.g., torque for M16 bolts ≥ 200 N·m).
   • Prefabricated Residential Buildings: Prioritize the installation of prefabricated wall panels, then lay laminated slabs, and finally install irregular components such as stairs and balconies.

V. Quality Control

1. Full-Process Monitoring: Inspect each stage of design, production, transportation, and installation. For example, components should undergo strength rebound testing before leaving the factory, and water spray tests should be conducted after installation to verify waterproof performance.
2. Acceptance Standards: Comply with specifications such as the "Technical Standard for Prefabricated Concrete Buildings" (GB/T 51231) or the "Standard for Design of Steel Structures" (GB 50017).