Large Hanging Container House

The construction of large hanging container houses requires focusing on three core aspects: procurement, ground treatment, and lifting and positioning. The specific processes and technical key points are as follows:

I. Procurement Stage: Structural Type and Material Quality are Key

Container house structures are divided into two categories: welded integral boxes and bolt-connected assembled boxes. Welded boxes are formed as a whole in the factory, with the load transferred from the side wall columns to the bottom sill and then evenly distributed to the ground. They have strong resistance to deformation and are suitable for frequent lifting and movement. Assembled boxes are connected using standard sheet bolts, and the tightness of the joints directly affects stability. It is necessary to focus on checking the wall thickness of the columns and bottom sill steel (common specifications range from 1.5 to 3 millimeters; the thicker the wall, the greater the load-bearing redundancy, but the self-weight also increases). In addition, the coating process on the surface of the box directly affects the anti-corrosion lifespan. Hot-dip galvanizing treatment is more corrosion-resistant than cold-dip galvanizing and is especially suitable for areas with large diurnal temperature differences and significant humidity changes.

II. Ground Treatment: Uniform Load-Bearing is the Foundation

The bottom sill of a container is usually an I-beam or channel steel, with a limited contact area with the ground. If placed directly on soft soil, local pressure can cause uneven settlement of the box, leading to deformation of doors and windows and cracks in the walls. For long-term fixed use scenarios, a concrete strip foundation should be poured, with a recommended width of 30-50 centimeters and a depth determined according to the thickness of the frozen soil layer. The horizontal height difference of the foundation top surface should not exceed 5 millimeters. For short-term use scenarios, pre-fabricated concrete blocks or steel pads can be used, with a spacing between the blocks not exceeding 2 meters. A crushed stone leveling layer should be laid underneath to ensure that the load-bearing points are on the same horizontal plane.

III. Lifting and Positioning: Synchronous Load-Bearing and Levelness Control

There are usually 4-6 lifting points at the bottom of a container. When lifting, sufficient load-bearing steel wire ropes should be used, and it is necessary to ensure that all lifting points bear the load synchronously to avoid box distortion caused by unilateral loading. After the box is positioned, the fit between the bottom sill and the foundation blocks should be checked immediately. If there is local suspension, thin steel sheets should be used to pad it solid to prevent vibration or abnormal noise of the floor due to uneven load-bearing during subsequent use. Levelness detection should be carried out using a level along the longitudinal and transverse directions of the bottom sill, with an error controlled within 2 millimeters per meter.