Drainage of Container Houses

The drainage of container houses is mainly achieved through the rational design of roof drainage systems, with common methods including gravity drainage and siphon drainage, while also requiring targeted treatment based on the characteristics of container modifications.

I. Design of Roof Drainage Systems

The design of roof drainage systems for container houses should select an appropriate method based on the building type, structural form, and climatic conditions. Common types include:

1. Gravity Roof Drainage System
   Rainwater is collected through gutters or eaves gutters and discharged by gravity through rainwater hoppers and downpipes. This system is simple in design and construction, and operates safely and reliably. However, it is necessary to control the flow rate within the gravity flow range to avoid damage to the downpipes or overflow from indoor inspection wells due to excessive flow. The system requires more piping and occupies more space, making it suitable for buildings with smaller roof areas.
2. Roof Siphon Rainwater Drainage System
   This system utilizes the energy generated by the height difference between the roof and the ground. When water accumulates on the roof to a certain height, a full-pipe flow state is formed, and rapid drainage is achieved through negative pressure suction. The system consists of rainwater hoppers, suspended pipes, downpipes, and drainage pipes. It has stronger drainage capacity, reduces the number of pipes, and does not require a slope for the suspended pipes, making it suitable for buildings with many underground pipes.

II. Drainage Treatment for Container Modifications

The modification of container houses requires targeted drainage design based on their structural characteristics:

1. Container Combination Drainage
   When containers are combined to form a building, drainage slopes or guide troughs should be set at the joints to prevent water accumulation. For example, gutters can be installed on the top of the containers to guide rainwater to the drainage downpipes.
2. Anti-Seepage Treatment
   The base material of the containers should undergo rust removal, corrosion prevention, and waterproofing treatment to ensure that the containers themselves do not leak. At the same time, sealants or welding processes should be used at the container joints to prevent rainwater from seeping in through gaps.
3. Ground Drainage
   The interior ground of container houses should be set with a certain slope to ensure that rainwater or domestic water can be smoothly discharged to floor drains or drainage ditches. For sunken structures, secondary drainage devices should be installed to prevent water accumulation from damaging the structure or causing mold.

III. Drainage Design for Special Scenarios

1. Severe Cold Regions
   An internal drainage system should be adopted to avoid freezing and blockage of external drainage pipes. The internal drainage system consists of rainwater hoppers, connecting pipes, suspended pipes, downpipes, and discharge pipes, ensuring that rainwater can be smoothly discharged to outdoor inspection wells or pipe networks.
2. Large-Span Roofs
   For industrial plants and other buildings with long external drainage pipes that are difficult to arrange, gutter external drainage or internal drainage systems should be adopted to ensure safe and reliable drainage.