Prefabricated Concrete House Assembly Solution

The prefabricated concrete house assembly solution encompasses two core aspects: design and installation, which need to be implemented step-by-step in accordance with functional requirements, structural safety, and construction specifications. Details are as follows:

I. Design Phase

1. Preliminary Site Survey and Requirement Definition

   • Site Survey: It is necessary to confirm the topography, foundation bearing capacity, surrounding pipeline routes, and power supply connection points, and clarify the site elevation and building spacing requirements. For example, in mountainous areas, slope stability needs to be evaluated, while in plains, areas with excessively high groundwater levels should be avoided.
   • Requirement Positioning: Design parameters should be determined based on the intended use. For instance, rural permanent residences should meet insulation (wall thickness ≥ 20 cm + insulation layer), waterproofing (pitched roof drainage slope ≥ 30°), and sound insulation requirements, with a recommended floor height of 3.2-3.3 meters. Temporary office buildings can have a reduced floor height of 2.8-3 meters and be designed with detachable connection nodes to support reuse.

2. Modular Design

   • Dimensions and Assembly: Standard 3m × 6m modules are used, which can be split and combined to form spaces such as 3m × 3m and 3m × 4.5m, with a total number of floors not exceeding three.
   • Walls and Windows/Doors: In severely cold regions in the north, wall thickness is increased to 20 cm with reserved space for insulation layers, while in warm southern regions, it can be reduced to 15 cm. The south-facing window-to-wall ratio should be controlled between 0.4-0.5 to optimize daylighting, and additional ventilation openings should be reserved in bathrooms and kitchens.
   • Utilities and Roof: Pipeline embedment should be positioned in conjunction with furniture layout. In rainy regions, the roof slope should be ≥ 30°, while in less rainy regions, a flat roof with a drainage slope of 1.5%-2% can be used.

3. Structural Safety Verification

   • Seismic Fortification: Conventional areas should be fortified to a 6-degree standard, with higher standards required in high-risk zones. Floor live loads should be adjusted according to the intended use, such as 3.5 kN/m² for storage buildings.
   • Connection Node Optimization: The connections between modules and between modules and foundations should be individually verified for stress to avoid uneven settlement. For example, column-to-column connections should use sleeve grouting, while beam-to-column connections should form rigid nodes through corbel plates with post-poured concrete.

II. Installation Phase

1. Preparation Stage

   • Component Inspection: Confirm that the dimensions, specifications, and strength of prefabricated components meet design requirements, and that the positions of reserved sleeves and reinforcing bars are consistent with the drawings.
   • Materials and Equipment: Prepare cement mortar, lifting equipment, and sealing materials, ensuring that all construction tools are available.

2. Foundation Treatment

   • Foundation Pouring: Select concrete foundations or strip foundations based on geological conditions to ensure adequate bearing capacity.
   • Precision Control: Verify the dimensions and elevations of each position according to the design drawings, with errors controlled within the allowable range of specifications.

3. Component Lifting and Connection

   • Assembly Sequence: Adopt a progressive lifting method, installing columns, beams, and slabs in sequence to ensure structural stability.
   • Connection Techniques: Column-to-column connections should use sleeve grouting, while beam-to-column connections should be welded via corbel plates and then poured with concrete. Floor slabs should be connected to beams through hooked bars extending into post-poured strips, and wall gaps should be filled with sealing materials to prevent leakage.

4. Inspection and Cleanup

   • Appearance Acceptance: Check the overall flatness, connection firmness, and sealing of the house, and clean up excess materials before putting it into use.

This solution enables efficient and safe assembly of prefabricated concrete houses through standardized design, meticulous verification, and standardized construction.