Container House Cushion Thickness

There is no unified standard for the cushion thickness of container houses, which needs to be comprehensively determined according to specific design, functional requirements, and foundation conditions. The following analysis is carried out from three aspects: design specifications, functional requirements, and foundation conditions.

1. Design Specifications and Structural Requirements
The cushion thickness of container houses needs to match the overall structural design. For example, in container houses with an integrated welded structure, the corner fittings are the only stacking force-transmission points, and the cushion needs to ensure a stable connection between the corner fittings and the foundation. If designed as multi-story stacked boxes (such as a 6-story dormitory), the cushion needs to bear vertical loads and evenly distribute them to the foundation. In this case, the cushion thickness may need to reach more than 200mm to enhance lateral resistance. Additionally, if the container house needs to meet seismic fortification requirements (such as seismic fortification ≤ 8 degrees), the cushion may need to adopt a reinforced concrete structure, with the thickness further increased to 300-500mm to improve overall stiffness.

2. Functional Requirements and Load Conditions
Container houses with different functional uses have different requirements for cushion thickness. For example, when used as temporary dormitories or office spaces, if the ground load is relatively small, the cushion thickness can be controlled within 100-150mm, and ordinary concrete or gravel cushions can meet the requirements. However, if used for heavy-load scenarios such as equipment storage or laboratories, the cushion needs to bear greater loads, and the thickness may need to reach 200-300mm, and high-strength concrete or the addition of steel mesh can be used to enhance load-bearing capacity.

3. Foundation Conditions and Geological Environment
The cushion thickness also needs to be adjusted according to foundation conditions. In soft soil foundations or permafrost regions, the cushion needs to play a role in diffusing loads and preventing uneven settlement, and the thickness may need to reach more than 500mm, with layered compaction or replacement treatment adopted. For example, in some container house projects in Bayannao'er, Inner Mongolia, due to complex geological conditions, the cushion adopts a 300mm thick gravel cushion plus a 200mm thick C20 concrete to ensure stability. In rock foundations or regions with high bearing capacity, the cushion thickness can be appropriately reduced to about 100mm.