Construction of Environmental Protection Mobile Toilets in Qinghai
The construction of environmental protection mobile toilets in Qinghai requires comprehensive consideration from multiple aspects such as site selection, structure, facilities, preparation, and environmental protection to ensure adaptation to the plateau environment and achievement of eco-friendly goals.
Site selection and foundation preparation are the primary steps in construction. Site selection should avoid areas prone to geological disasters and ecologically sensitive zones, prioritizing flat terrain with good drainage. Foundation treatment needs to adapt to the characteristics of large temperature differences between day and night and frequent freeze-thaw cycles in Qinghai. Usually, concrete pouring or precast slab bedding is used to ensure a level and stable bearing surface. For example, in areas with thick permafrost layers, the foundation depth needs to be designed specifically to prevent frost heave damage.
Main structure assembly should balance lightweight and weather resistance. Color-coated steel sheets, as the main building material, have anti-corrosion coatings that can withstand strong ultraviolet rays on the plateau. The sheets are connected to steel frames with bolts to form a closed space, and silicone weather-resistant sealants are used at the joints to enhance airtightness. Modular design is crucial. Components such as toilet units and wall panels are prefabricated in factories and then assembled on-site, improving construction efficiency and structural stability.
Internal facility configuration should be adapted to local conditions. Standard configurations include water-saving flushing devices, ventilation systems, and lighting equipment. However, in areas with scarce water resources, biological degradation or chemical treatment technologies should be used instead of traditional flushing. For example, plateau-specific vacuum suction toilets combined with anti-freeze flushing devices are used, with pipes made of 304 stainless steel and wrapped with insulation layers. The heating system maintains the temperature between 12 - 18℃ through wall-mounted diesel warm air blowers and floor heating coils. The ventilation system is equipped with top turbine ventilators and forced exhaust devices to ensure an air exchange rate of ≥8 times per hour.
Construction preparation and resource allocation should be refined. Technical preparations include geological surveys of permafrost layer thickness and groundwater levels, and material pre-treatments such as low-temperature impact toughness tests for steel and high-altitude insulation modifications for electrical components. Modular prefabrication is completed in factories in Xining, with pre-assembly and waterproof tests conducted before transportation. Resource allocation requires specialized equipment such as high-altitude loaders and low-temperature hydraulic breakers.
Environmental significance is reflected in carbon reduction throughout the life cycle. The prefabricated production and on-site assembly model reduces building material waste and construction debris, with a color-coated steel sheet recycling rate exceeding 80%. Biological degradation and membrane filtration technologies convert excreta into harmless substances, preventing soil and water pollution and meeting the ecological protection needs of Qinghai.
