Prefabricated Foundation for Movable Houses

The prefabricated foundation for movable houses typically uses concrete prefabricated blocks or thickened steel plates, with the specific choice depending on the house type, usage scenario, and load-bearing requirements.

I. Core Requirements for the Foundation of Movable Houses

Unlike traditional buildings, the foundation of movable houses does not require deep excavation or permanent pouring. Its core requirements are flatness, compaction, and basic load-bearing capacity. Small houses can be directly placed on the prefabricated foundation without complex construction, significantly reducing time and cost investment. For example, in scenarios involving temporary mobile sheds or frequent relocation, the foundation needs to balance load-bearing stability and relocation flexibility to avoid restricting house movement due to fixed structures.

II. Common Materials and Specifications for Prefabricated Foundations

1. Concrete Prefabricated Blocks

   • Usage Scenarios: Small movable houses, temporary sites, or low-frequency relocation scenarios.
   • Specification Parameters: Typically sized at 600×600×100mm, poured with high-strength concrete, featuring a flat surface and internal reinforcement to enhance crack resistance.
   • Advantages: Low cost, fast construction, can be directly laid on compacted ground, and can adapt to different house sizes by adjusting the number of blocks; the downside is that each block needs to be moved individually during relocation, offering slightly less flexibility than steel plates.

2. Thickened Steel Plates

   • Usage Scenarios: High-frequency relocation scenarios, support for heavy equipment, or soft ground foundations.
   • Specification Parameters: Thickness ≥8mm, mostly made of Q235 or Q345 carbon steel, with surface rust prevention treatment (such as painting or galvanizing).
   • Advantages: Lightweight, high strength, can be quickly connected into a whole using bolts or welding, and can be directly hoisted during relocation; the downside is higher cost and the need to ensure ground flatness to avoid plate deformation.

III. Key Considerations for Material Selection

• House Weight: Heavy houses (such as mobile offices with heavy equipment) should prioritize steel plates, while light houses (such as temporary exhibition halls) can use concrete blocks.
• Relocation Frequency: If relocation is required more than once a month, steel plates are preferable; for low-frequency relocation (such as once a year), concrete blocks can be chosen.
• Ground Conditions: Soft ground foundations (such as mud or sand) require increased steel plate thickness or concrete pile reinforcement, while hard ground (such as asphalt or concrete) can directly lay the prefabricated foundation.

IV. Construction Points and Precautions

1. Ground Preparation: Regardless of the material chosen, clear ground debris first and compact it using a road roller or tamper to ensure foundation settlement is ≤5mm.
2. Level Calibration: Use a laser level to adjust the flatness of the prefabricated blocks or steel plates, with an error controlled within ±2mm to avoid house tilting.
3. Connection and Fixation: Steel plates can be fixed using bolts or welding, while concrete blocks need to be filled with cement mortar to prevent displacement.
4. Moisture Prevention: Lay a moisture-proof membrane between the prefabricated foundation and the house bottom, especially suitable for humid areas or long-term stationary scenarios.