Images of Underground Prefabricated House Structures

The following is a compilation of reference information on images and descriptions related to underground prefabricated house structures:

1. SPCS Structural System
The SPCS structural system centers on the combination of prefabricated components and cast-in-place concrete, suitable for underground space development.

• Node and Solid Images of Basement Exterior Walls: Components are designed with 'no protruding rebars' around the perimeter, with internal reserved cavities for post-poured concrete, forming an integral structure. The joints employ a four-layer waterproofing system, including cast-in-place structural self-waterproofing, waterproof sealant, and two layers of waterproofing membranes, ensuring the impermeability of underground projects.
• Node and Model Images of Hollow Prefabricated Columns: There are two types: 'protruding rebars at both ends' and 'no protruding rebars at the bottom'. The former is suitable for column-beam joint connections, transferring loads through rebar anchoring; the latter is used for direct bedding installation at the column base, simplifying the construction process.
• Solid Image of Prestressed Thin-Bottom Composite Beams: The prefabricated part has a thin thickness, with a large proportion of the cast-in-place layer, reducing beam height by 5%-10% and increasing indoor clear height. Prestressing technology reduces cracks and enhances structural durability.
• Solid Image of Prestressed Steel Pipe Truss Composite Slabs: Dense splicing construction is used, with no post-poured strips between slabs, achieving a maximum span of 12 meters. Steel pipe trusses provide temporary support, reducing the amount of full scaffolding and improving construction efficiency by over 30%.

2. Cast-in-Place Underground Diaphragm Walls
Cast-in-place underground diaphragm walls are formed by combining trench sections to create support or main structures, suitable for deep excavation projects.

• Plan View Schematics of Conventional Cast-in-Place Underground Diaphragm Walls: Include trench section forms such as slab-type, T-type, and Π-type. Slab-type is used for straight sections; T-type and Π-type are used for corners or intersections, enhancing structural integrity. Combined structures can form grid-like or cylindrical spaces, improving lateral stiffness.
• Plan View Schematic of Cylindrical Underground Diaphragm Walls: Formed by enclosing slab-type or corner trench sections into a circular structure. Utilizing the soil arching effect, soil pressure is dispersed to both sides, reducing single-point stress, suitable for soft soil layers or high-water pressure environments.

3. Prefabricated Cement Houses
Prefabricated cement houses achieve rapid construction through factory prefabrication and on-site assembly, suitable for temporary or permanent underground residences.

• Real-life Image of a Two-Story Finished House: Adopts an overall one-time pouring process, with walls and floors forming an integral structure. Materials are added with crack-resistant fibers and flame retardants, possessing properties such as seismic fortification intensity of 8 degrees, fire resistance rating of 2 hours, and thermal conductivity ≤ 0.03W/(m·K), adapting to underground humid environments.

Image Acquisition Suggestions: Detailed illustrations of the SPCS structural system and cast-in-place underground diaphragm walls can be found in Figures 1 to 8 of references [1][2]; real-life images of prefabricated cement houses can be obtained by contacting Huacheng Cement House Factory.