Construction Plan for Concrete Prefabricated Houses

The construction plan for concrete prefabricated houses covers four key aspects: project overview, construction preparation, construction techniques, and quality control and acceptance. The details are as follows:

I. Project Overview
The project scale typically ranges from 500 square meters to 200,000 square meters, with most buildings having three stories. The structures employ fully prefabricated assembled concrete systems or modular structural systems. In terms of structural parameters, the seismic fortification intensity is 7 degrees, with a design service life of either 50 or 70 years. Prefabricated components include wall panels, floor slabs, beams and columns, stairs, etc., with a maximum weight of up to 8 tons and a maximum size of 6m × 2.4m. The foundation types are pile foundations or reinforced concrete strip foundations, with a characteristic value of foundation bearing capacity not less than 180kPa.

II. Construction Preparation

1. Technical Preparation: Organize drawing reviews to verify critical information such as component dimensions and connection nodes, and complete detailed design. Prepare a construction organization plan, outlining transportation routes, lifting plans, and grouting operation instructions. Conduct technical briefings for construction teams and simulate the construction process using BIM technology.
2. Site Preparation: Harden the site with 200mm-thick C20 concrete and designate areas for component storage and lifting operations. Erect temporary facilities and adopt a TN-S neutral protection system. Establish a horizontal control network (using a total station) and a vertical control network (using a level).
3. Resource Preparation: Materials include C30-C40 prefabricated components, non-shrink grout (compressive strength ≥ 85MPa), high-strength bolts (Grade 8.8), etc. Equipment includes 25t truck cranes, 50t crawler cranes, and grouting machines.

III. Construction Techniques

1. Foundation Treatment: Clear obstacles, compact the foundation, select the foundation type based on geological conditions, and verify bearing capacity.
2. Component Fabrication and Transportation: Prefabricate components in the factory with a curing time of no less than 7 days. Equip transportation with dedicated fixing brackets and plan the shortest route.
3. Component Installation: Control axis deviation ≤ 5mm and elevation deviation ≤ 3mm during lifting. Ensure node firmness through rebar sleeve connections, high-strength bolt fixation, or grout filling. Adjust verticality and levelness using a total station and level.
4. Subsequent Construction: Complete wall plastering, pipeline installation, roof waterproofing, and interior decoration.

IV. Quality Control and Acceptance

1. Quality Acceptance Control Points: Component installation axis deviation ≤ 5mm, elevation error ± 3mm; initial flowability of grout ≥ 300mm, 28-day strength ≥ 85MPa; torque coefficient of high-strength bolts within the range of 0.11~0.15.
2. Completion Acceptance: Conduct an overall acceptance after construction to check if the building meets design requirements and relevant regulations.

Actual construction should adjust details based on project scale, structural form, and design standards.