Underground Prefabricated House Image Collection

Currently, it is not possible to directly provide an 'Underground Prefabricated House Image Collection', but a unique form of underground dwelling—the pit house—can be introduced.

Pit houses, also known as sunken courtyard dwellings or pit kilns, are a traditional form of residential architecture unique to the western Henan region (such as Sanmenxia in Henan, Yuncheng in Shanxi, and Qingyang in Gansu). Their core characteristic is that they are completely built underground, with courtyards and caves formed by excavating downward, showcasing unique architectural wisdom and ecological adaptability.

Construction Methods and Structural Features

Pit houses are constructed without requiring large quantities of building materials, relying mainly on manual excavation and mutual assistance from neighbors. Their structure typically includes:

• Residential Caves: The north and west caves, which receive the longest sunlight exposure, are often used as the main living spaces, balancing lighting and warmth needs.
• Functional Caves: Depending on living requirements, livestock caves (for raising animals), granary caves (for storing grain), and toilet caves are designed, forming a complete underground living system.
• Wells and Fruit Trees: A deep well is often dug in the center of the courtyard to solve drinking water problems; planting fruit trees (such as pear and jujube trees) not only beautifies the environment but also provides food sources.

Drainage and Rainwater Collection Systems

Pit houses, being underground, need to address drainage challenges:

• Entrance Cisterns: Small cisterns are dug beneath the ramps or steps at the ground entrance to collect rainwater for daily use.
• Courtyard Infiltration Wells: Bell-shaped infiltration wells are dug in the courtyard, with drainage ditches directing rainwater into them. The soil's infiltration properties naturally drain the water, preventing waterlogging.

Ecological Adaptability

The design of pit houses fully reflects the utilization of the natural environment:

• Warm in Winter and Cool in Summer: The underground space maintains a stable temperature, eliminating the need for additional heating in winter and keeping cool in summer.
• Concealment: The entrance is concealed on the ground, ensuring safety and reducing wind and sand erosion.
• Resource Conservation: Relying on local materials and manual labor reduces dependence on external resources, aligning with sustainable architectural principles.

Pit houses, as representatives of underground dwellings, demonstrate the wisdom of harmonious coexistence between humans and nature. Although not modern 'prefabricated houses', their architectural concepts still provide important references for ecological architecture.