Prefabricated House Assembly Design Solution

The design solution for prefabricated house assembly should cover five stages: design, production, transportation, installation, and quality control. Each stage should adhere to standardized and modular principles to ensure structural safety, efficient construction, and compliance with green building concepts.

I. Design Phase

1. Design Principles
   • Focus on the functional requirements of the building to ensure structural safety and stability. Prioritize the use of assembled monolithic concrete frame structures (for buildings up to three stories, a pure frame system is recommended, with fully prefabricated columns, beams, and slabs, and post-poured concrete connections at the joints).
   • Comply with green building standards by selecting eco-friendly and energy-efficient materials to reduce energy consumption.
   • Modular design should consider transportation constraints (such as maximum component size and individual weight) and industrial production requirements.
2. Detailed Design
   • Utilize BIM models to complete component splitting and numbering. Wall panel splitting should follow the principles of "continuous load-bearing and convenient transportation," producing processing drawings that include 3D coordinate positioning, embedded part specifications, and reserved holes for water and electricity pipelines.
   • Node connections should be verified for strength through finite element analysis. For example, column-to-column connections use sleeve grouting, beam-to-column connections use a combination of a cleat plate and post-poured concrete, and slab-to-beam connections are made by extending hairpins into the post-poured strip.

II. Production Phase

1. Component Production
   • The dimensional accuracy of prefabricated components must meet standards, with no cracks, honeycombing, or other defects on the surface. Connection nodes (such as sleeve grouting and cleat plates) must undergo full-scale tests in the factory to verify strength.
2. Quality Inspection
   • Conduct structural mechanics calculations on components, focusing on verifying the strength of node connections and overall lateral stiffness to ensure compliance with national standards.

III. Transportation Phase

1. Transportation Method
   • Select flatbed trucks or trailers based on component size. Avoid congested and construction areas on the transportation route, and ensure regular vehicle maintenance.
2. Protective Measures
   • Components should be packaged to prevent collisions and moisture damage, and securely fixed during transportation to avoid damage.

IV. Installation Phase

1. Site Preparation
   • Harden the construction site and install a drainage system. Lay a gravel base and wooden pads in the component stacking area, and set up a survey control network and elevation reference points.
2. Lifting and Connection
   • Use cranes to lift components to their designated positions and complete node connections (such as post-poured concrete and grouting sleeves) according to design requirements. Adjust component positions to ensure structural stability.
3. Acceptance Criteria
   • Installation quality must comply with national standards, with a focus on inspecting the strength of node connections and overall verticality.

V. Quality Control

1. Full-Process Monitoring
   • Review drawings and train design personnel during the design phase; monitor component production and inspection during the production phase; inspect vehicles and routes during the transportation phase; and monitor lifting, connection, and acceptance processes during the installation phase.
2. Standard Basis
   • Each stage must strictly adhere to relevant national standards (such as component dimensional tolerances and connection node strength) to ensure the safety and durability of the house.