Latest Plan for Prefabricated House Foundations

The latest plan for prefabricated house foundations should be selected based on building type, geological conditions, and functional requirements. Below are the core contents of four types of plans: general-purpose, temporary buildings, modular buildings, and moisture-proof specialized plans.

I. General-Purpose Prefabricated Foundation Construction Plan Suitable for most conventional buildings, the core process includes:

1. Construction Preparation: Review design drawings and investigate geological conditions. Purchase materials such as cement, sand, gravel, and steel bars (with mechanical properties tested). Configure and debug equipment such as excavators and cranes.
2. Foundation Construction: First, clear the site and excavate to the designed depth, then compact the foundation with a road roller. Next, make formwork and process steel bars (ensuring welding quality). Finally, pour concrete using a concrete pump and cure it until the strength meets the standard (e.g., C25).
3. Quality Control: Focus on inspecting material quality, foundation compactness, and data recording of concealed works (such as steel bar connections and concrete pouring).

II. Specialized Plan for Prefabricated Foundations of Cement Houses (Suitable for Temporary Buildings) Designed for project offices or temporary accommodation scenarios, the key points are as follows:

1. Foundation Type: Use reinforced concrete independent foundations with a bearing capacity of ≥150 kPa. The top surface elevation is ±0.000 m and 0.3 m lower than the outdoor ground level, suitable for cement houses measuring 6 m × 3.6 m × 3 m and weighing approximately 12 tons.
2. Construction Process: After measuring and setting out the position, excavate and compact the foundation, lay a gravel cushion, and install embedded steel plates (for connecting steel beams). Finally, pour C25 concrete and cover it for curing.
3. Material Requirements: Use P·O 42.5 ordinary Portland cement for cement. Strictly control the mud content of sand and gravel (medium-coarse sand ≤ 3%, gravel ≤ 1%). Measuring equipment (such as total stations) should be regularly calibrated.

III. Customized Construction Plan for Prefabricated Houses (Modular Buildings) Emphasizing standardization and efficiency, the key steps include:

1. Foundation Construction: After leveling the site, compact it, make formwork, and pour concrete. Prefabricated components should be transported using specialized tools and stacked in order.
2. Assembly and Decoration: Install walls, roofs, and floor slabs in sequence (connected by bolts or welding), and then complete wall, floor, and door and window construction.
3. Schedule and Cost: Foundation construction takes about 15 days, assembly takes 20 days, and the total cycle is about 85 days (including decoration and acceptance). Standardized production reduces material waste and optimizes labor arrangements.

IV. Specialized Moisture-Proof Plan for Foundations of Rural Self-Built Houses (Supplementary Suggestions) If enhanced moisture-proof performance is required, the following measures can be combined:

1. Moisture-Proof Film Laying: After foundation backfilling, lay a high-density polyethylene film with a thickness of ≥0.15 mm. Seal the joints with waterproof tape, avoid puncturing by sharp objects, and use clean plain soil for backfilling.
2. Prefabricated Board Elevated Layer: Reserve a 30-50 cm cavity on the ground ring beam to isolate moisture through space. During construction, ensure that the backfill is compacted to prevent settlement.

Precautions: All plans should adjust foundation treatment methods according to actual geological conditions (such as soft soil or rock). Temporary buildings should focus on ease of assembly and disassembly, while modular buildings should strictly control the precision of component connections.