MERCURY SUSTAINABLE YAODONG VILLA

Located in Wenxi County, Shanxi Province, and led by students from the Mercury Sustainable Lab, the project represents a conservation initiative focused on the contemporary reactivation of traditional yaodong (cave dwellings) that is abandoned due to rural demographic aging. It ingeniously integrates community education with residential living while perfectly preserving indigenous intangible cultural heritage.
The project is rooted in the challenges of rural population out-migration and extreme climates in Shanxi. Although traditional cave dwellings naturally excel in thermal storage, they fail to meet the demands of modern users for aesthetic appeal, safety, comfort, and low energy consumption. In response, the design team has drawn inspiration from the protective eaves of the Mogao Caves, adding structured overhangs to the original loess cliffs. This not only provides physical shelter and facilitates easy drainage to effectively shield cliffs from wind and rain erosion, but also offers a contemporary reinterpretation of Jin-style architecture while preserving the original loess landform. Another core breakthrough is a self-developed vacuum photovoltaic glazing-based passive energy system. Vacuum photovoltaic glazing transforms window assemblies into energy-generating interfaces, complemented by the high thermal inertia of earthen construction, enabling passive house-level performance without external energy input and increasing indoor winter temperatures by approximately 20°C—solving the long-standing issue of northern cave dwellings being cold in winter and hot in summer.
At the implementation level, the project strictly adheres to the principles of local sourcing and a circular economy. Loess earth is employed as the primary construction material and excavated directly on site, minimizing material consumption and transportation emissions. Through a combination of rammed earth, earth-brick systems, and concealed reinforced concrete structural frame, the earthen structures achieve Grade 8 seismic resistance. The incorporation of natural fibres—such as cotton and hemp—significantly enhances cohesion to prevent wall cracking. Additionally, the project is constructed with the involvement of local villagers, while also utilizing digital modeling and simulation verification, organically fusing traditional craftsmanship with modern engineering.