Linyi Prefabricated House Construction Process

The construction process of prefabricated houses in Linyi varies depending on the structural type, with common processes for prefabricated concrete houses and prefabricated frame structures (including shear walls) as follows:

I. Construction Process of Prefabricated Concrete Houses

1. Foundation Preparation
   Before construction, conduct a geological survey of the site, clear ground obstacles, excavate and compact the foundation according to design requirements, ensuring that the foundation flatness error is ≤5mm and the bearing capacity meets design standards. This step provides a stable foundation for subsequent component installation.

2. Prefabricated Component Production
   Standardized production of wall panels, floor slabs, beams, columns, and other components in factories, using high-precision molds to ensure dimensional deviations ≤2mm, and enhancing concrete strength through steam curing to ensure component quality complies with the "Technical Standard for Prefabricated Concrete Buildings" (GB/T 51231-2016).

3. Concrete Pouring and Component Assembly
   After fixing the foundation with on-site concrete pouring, assemble components according to design drawings. Wall panels are connected using bolts or welding, and floor slabs are anchored to beams and columns through pre-embedded steel bars. During assembly, a laser level is used to continuously correct verticality.

4. Wall Treatment and Equipment Installation
   After assembly, perform surface treatments such as plastering, painting, or tiling, and simultaneously install window and door frames with sealing for waterproofing. Water, electricity, and gas pipelines should be pre-embedded in walls or floor slabs to avoid structural damage from later trenching.

5. Roof Construction and Acceptance
   Construct a lightweight steel or concrete roof structure, lay waterproof membranes, and conduct a closed-water test. Finally, carry out interior decoration and overall acceptance, checking structural safety, waterproof performance, and equipment operation.

II. Construction Process of Prefabricated Frame Structures (Taking Rural Self-built Houses as an Example)

1. Construction Preparation and Foundation Excavation
   Workers wear safety helmets, gloves, and other protective gear, check material certificates, and clear the site. Locate the foundation according to design drawings, determine the slope of the excavation side based on soil type (e.g., 1:0.5 for clay, 1:1 for sandy soil), and measure the foundation elevation with a level.

2. Foundation Construction and Frame Erection
   Pour concrete prefabricated I-beams or concrete stone row foundations, install prefabricated frame columns, and correct verticality with a theodolite. Connect transverse beams to form a frame, then fabricate and install columns and beams. When constructing floor slabs, complete three processes: steel bar processing, formwork installation, and concrete pouring.

3. Interior and Exterior Wall Masonry and Key Techniques
   After erecting scaffolding, masonry partition walls and exterior walls using the "three-one masonry method" to ensure mortar joint fullness ≥80%. For prefabricated shear wall structures, connect vertical steel bars using grout sleeves: insert steel bars into sleeves, inject special grout, and form bond strength after hardening. During construction, control the water-to-material ratio (0.12-0.14), mixing time (3-5 minutes), and ambient temperature (5-35℃). In winter, construct a thermal insulation shed for curing.

All processes must be carried out in accordance with local regulations such as the "Shandong Province Evaluation Standard for Prefabricated Buildings", focusing on key aspects such as component connection, waterproofing treatment, and structural safety.