Qinghai Mobile Toilet Design Solution
The design solution for mobile toilets in Qinghai needs to be tailored to the unique plateau environment, with targeted planning in terms of design standards, structural materials, functional systems, and construction key points. The specific solution is as follows:
I. Design Standards and Technical Parameters
Based on the 'Urban Public Toilet Design Standard' and the 'Barrier-Free Design Code', indicators such as wind resistance, cold resistance, and altitude adaptability are enhanced: wind resistance level ≥ Grade 10, cold resistance temperature of -30℃, altitude adaptability range of 3000-4500m, female toilet stalls accounting for 60%, and one barrier-free toilet stall provided for every 10 stalls. The structural design is divided into three categories: scenic area standard type (polyurethane sandwich color steel plate, snow load resistance of 1.5kN/㎡), highway service area reinforced type (rock wool sandwich stainless steel plate, snow load resistance of 2.0kN/㎡), and ecological reserve environmentally friendly type (bamboo-wood composite environmentally friendly board, snow load resistance of 1.8kN/㎡), all using lightweight high-strength alloy frames to meet the needs of frequent relocation.
II. Functional System Configuration
The toilet system adopts vacuum suction toilets (water-saving of 6L/flush), equipped with plateau-specific anti-freezing flushing devices and 304 stainless steel insulated pipes; the heating system combines wall-mounted diesel warm air blowers (starting at -25℃) with underfloor heating coils, with the temperature controlled between 12-18℃; the ventilation system achieves air exchange of ≥8 times per hour through top-mounted turbine ventilators and forced exhaust; the ecological reserve type is additionally equipped with diffuse oxygen supply equipment, with an oxygen concentration of 23-25%; sewage treatment adopts MBR membrane biotechnology (for scenic area types) or buried integrated equipment (for service area types), with emissions meeting Class A standards.
III. Structural and Material Adaptability
The box structure uses thermal insulation sandwich panels (polyurethane/rock wool), with sealing treatment to prevent wind and sand intrusion; the support frame is made of stainless steel or aluminum alloy to ensure stability; foundation construction adopts the 'replacement method' for permafrost layers, removing 0.5m of permafrost and replacing it with graded sand and gravel, pouring C30 concrete independent foundations, and incorporating anti-frost heave buffer layers (XPS extruded polystyrene boards).
IV. Construction Organization and Process
The construction process includes factory prefabrication → foundation construction → module transportation → hoisting and positioning → pipeline connection → decoration and finishing → commissioning and acceptance. Key technologies include cold region foundation curing (covered with thermal insulation materials), pipeline system plateau adaptation (304 stainless steel pipes + insulation layers), and electrical component insulation treatment at an altitude of 4000m.
V. Environmental Adaptability Design
Foundation construction avoids damaging meadow vegetation, with sewage undergoing tertiary purification and reuse; solar panels are installed in areas without power grids to supplement electricity; the design service life is 10 years, adapting to extreme temperatures ranging from -30℃ to 50℃, balancing functionality, mobility, and ecological impact.
