Installation of Mobile Toilets at Dingxi Square
The installation of mobile toilets at Dingxi Square requires comprehensive planning from six aspects: structural materials, environmental adaptability, functional configuration, installation process, maintenance support, and compliance and adaptability.
1. Structural and Material Selection Priority is given to using steel structural frameworks paired with anti-corrosion color steel plates or FRP composite panels to ensure modular assembly characteristics. Given the large temperature variations between day and night and low winter temperatures in Dingxi, wall panels should utilize 50mm-thick metal carved plate sandwich panels (with flame-retardant polyurethane as the core material), and roofs should use 0.5mm-thick galvanized aluminum-zinc color steel plates, equipped with a freeze-proof insulation layer of ≥50mm rock wool + aluminum foil reflective layer. The bottom connections should feature anti-displacement designs to cope with strong winds.
2. Environmental Adaptability Optimization
- Climate Protection: Sewage pipelines should be equipped with electric tracing systems to prevent freezing at low temperatures; the ventilation system should combine directional vents with filters, and the sealing performance of the sewage system should exceed standards for humid regions.
- Wind and Earthquake Resistance: The structure should meet the requirements for an 8-degree seismic fortification intensity, and the soil bearing capacity of the foundation should be >80kN/m². It is recommended to use concrete foundations or screw piles to adapt to the collapsible loess foundation in the Loess Plateau.
- Sand and Dust Prevention: The filters in the vents should be cleaned regularly, and the aging of sealing strips should be checked seasonally.
3. Functional Configuration Design
- Basic Functions: Include squat toilets, sinks, non-slip floors, door locks, and exhaust fans, with foldable L-shaped safety handrails beside the toilet stalls.
- Extended Functions: Scenic areas can be equipped with bilingual signs, construction camps should use explosion-proof lighting, and desert areas are advised to use corrosion-resistant sewage tanks (with a volume of ≥1.2m³).
- Barrier-Free Design: The entrance ramp should have a slope of ≤1:12, the passage width should be ≥0.9 meters, an internal space of 1.5 meters should be reserved for wheelchair turning, and emergency call buttons should be installed at a height of 0.4-0.5 meters.
4. Installation Process Specifications
- Site Selection and Layout: Avoid areas with dense underground pipelines, maintain a distance of 10-30 meters from main walkways, and conduct simple geological surveys of the foundation.
- Modular Assembly: Quickly unfold using hydraulic devices, with a single installation cycle controllable within 3 hours, without the need for heavy machinery assistance.
- Water and Electricity Connections: Adopt an independent water circulation system (including three-stage filtration and biological treatment units), and rely on solar photovoltaic systems for power supply (the peak power of the photovoltaic panels should meet at least 1.5 times the average daily electricity consumption).
5. Maintenance Support Mechanisms
- Daily Maintenance: Include the removal of solid waste collection devices, inspection of water-saving valves, and cleaning of ventilation filters.
- Operation and Maintenance Support: Choose enterprises that provide localized maintenance teams (with a response time of ≤4 hours), WeChat mini-program repair reporting, and regular delivery of consumables.
6. Compliance and Adaptability Requirements It must pass the备案 (filing) of GB/T 18045-2021 'General Technical Conditions for Mobile Public Toilets' and the 'Technical Guidelines for Rural Human Settlements Improvement' in Gansu Province, and provide localized foundation adaptation plans. Recommended enterprises such as Guting Metal Products (GTS-600 series), Jinmuhe Metal Products (JM-ECO series), and the Dingxi City Branch (prefabricated mobile toilets) can provide customized services.
