Gansu Environmental Protection Mobile Toilet Construction

The construction of environmental protection mobile toilets in Gansu requires comprehensive consideration of climate, geology, efficiency, and environmental protection requirements, achieving efficient construction through modular design and standardized processes.

I. Project Overview and Compilation Basis
Mobile toilet construction in Gansu covers various scenarios such as scenic spots, city squares, transportation hubs, and construction sites, primarily utilizing modular design. For example, a project constructed 50 toilets, each occupying 15-20 square meters, adopting a light steel structure with a composite color steel plate enclosure system, featuring freeze resistance, water conservation, wind resistance, and rapid relocation capabilities. The compilation basis includes national standards such as the 'Design Code for Outdoor Public Toilets' (GB50337-2013) and the 'Unified Standard for Construction Quality Acceptance of Building Engineering' (GB 50300-2013), local standards like the 'Technical Specification for the Construction of Rural Freeze-Resistant and Water-Saving Household Sanitary Toilets' (DB62/T5098-2025), as well as climate adaptation requirements (e.g., -15°C low temperatures in the Hexi Corridor, 400-800mm annual precipitation in southeastern Gansu) and site restriction clauses.

II. Engineering Characteristics and Challenges

1. Climate-Adaptive Construction: The Hexi Corridor requires solutions for winter pipe freeze protection, employing electric tracing heating technology; southeastern Gansu is equipped with reinforced drainage systems to cope with heavy precipitation; sandstorm weather necessitates enhanced window and door sealing.
2. Geological Condition Variations: The Gobi region in Hexi adopts gravel replacement foundations, while the Loess Plateau region implements lime-soil compaction piles to ensure foundation stability.
3. Rapid Construction Requirements: The on-site installation period for a single toilet is controlled within 48 hours, relying on factory-prefabricated modular components (such as steel structure frames, wall modules, and sanitary equipment units) to reduce on-site work volume.

III. Materials and Design
The primary material is composite color steel plate, composed of a colored coating steel plate and core materials like polyurethane and rock wool, possessing compression resistance, bending resistance, weather resistance, and corrosion resistance. The design adopts a modular concept, with color steel components prefabricated in the factory and assembled on-site using dedicated connectors, avoiding welding or concrete pouring to shorten the construction period. According to climate zones, it is divided into three technical versions: Hexi Corridor type (enhanced freeze resistance), Central Gansu Plateau type (wind and sand resistance), and Southern Gansu humid type (efficient drainage).

IV. Environmental Protection Performance
Some core materials of the toilets use recycled materials, reducing raw material consumption; the detachable structure supports overall relocation and reuse, lowering construction waste generation. The water treatment system is equipped with biological degradation or physical filtration devices to reduce direct sewage discharge, and standardized use can reduce sanitation hazards on construction sites by more than 30%.