Prefabricated House Exterior Wall Construction

The construction of the exterior walls of prefabricated houses mainly includes the following steps and key points:

I. Construction Preparation Stage

1. Component Transportation and Arrival: Arrange transportation according to the component arrival plan. During transportation, protect the components to avoid collision damage. After arrival, inspect the components and only install them if they pass the inspection.
2. Setting Out and Positioning: Release the positioning edge lines of the prefabricated exterior walls on the floor slab based on the positioning axes. At the same time, check the flatness of the floor slab and the positions of the embedded bolts. Clean the ground of the construction layer to ensure accurate installation references.
3. Component Preparation: Correct the skewed reinforcing bars. Use a special positioning plate to verify the positioning and perpendicularity of the reserved reinforcing bars. Place adjusting shims at the marked wall panel positions on the floor slab and attach rubber strips to seal the gaps. Check the component numbers and overall quality of the wall panels to ensure there are no cracks, deformations, or other defects.

II. Installation Construction Stage

1. Install Protective Frames: Fix the external protective frames on the outer leaf panels of the prefabricated wall panels to provide safety protection for subsequent construction.
2. Component Hoisting: Connect the steel wire ropes to the lifting points of the wall panels through lifting connectors. Hoist the components to a height of approximately 500 millimeters above the ground and stop to check the component status and the installation of the lifting ropes and fixtures. After confirmation, slowly and uniformly hoist the components. When they are about 1 meter above the floor slab, stop to eliminate component swing.
3. Component Positioning: Installation personnel assist in lowering the components by hand. When the components are about 300 millimeters above the ground, auxiliary personnel gently push the components to initially position them according to the positioning lines. Use a mirror to observe whether the reinforcing bars align with the grout sleeves. After confirmation, slowly lower the components into place.

III. Quality Inspection and Fixing Stage

1. Elevation and Levelness Inspection: Use a 500-millimeter elevation line to check the elevation and levelness of the wall panels to ensure they meet the design requirements.
2. Install Inclined Supports: Connect the support rods to the pre-installed connectors on the wall panels. After stabilization, remove the lifting hooks. Adjust the inclined supports to precisely adjust the horizontal positioning and perpendicularity of the wall panels. Use the floor slab positioning lines as the reference for the horizontal positions and a level ruler to check the perpendicularity. After adjustment, tighten the connections.

IV. Acceptance Stage After the component installation is completed, conduct actual measurements and inspections of the component edge lines, end lines, perpendicularity, and vertical joint widths to ensure they comply with technical standards such as the "Construction Guide for Integrated Thermal Insulation Structures of Prefabricated Exterior Walls in Prefabricated Concrete Residential Buildings" and prevent quality issues such as exterior wall cracking, detachment, and water leakage.