Lanzhou Simple Mobile Toilet Installation

The installation of simple mobile toilets (such as color-steel mobile toilets) in Lanzhou requires a systematic process, covering site assessment, modular assembly, functional system integration, and environmental adaptation. The specific steps are as follows:

1. Site Adaptability Assessment
   Geological conditions are the foundation for installation, and the bearing capacity of the soil layer must be checked. If the soil is soft, a concrete cushion or pile foundation should be poured to enhance stability. If the site slope exceeds 5%, the supports should be adjusted or a level platform built to prevent structural tilting. The width of surrounding passageways should be ≥6 meters to ensure free rotation of transport vehicles and lifting equipment. Additionally, the distribution of underground pipelines should be surveyed in advance to avoid damaging water supply, drainage, or gas pipelines during construction.

2. Modular Assembly Sequence

   • Bottom Treatment: Lay a polymer isolation membrane and weld the seams to form a continuous anti-seepage layer, preventing sewage leakage and soil contamination.
   • Frame Installation: Use bolts to connect the load-bearing frame for easy disassembly, adjustment, or relocation later. Hot-dip galvanized steel is recommended for the frame material due to its strong corrosion resistance.
   • Wall Panels and Roof: Fix them in sequence from bottom to top and from outside to inside. Inject sealant at the seams of color-steel panels for waterproofing. Metal carved panels can be used for the exterior walls, offering both aesthetics and thermal insulation.
   • Internal Piping: The sewage pipe should maintain a slope of three thousandths to achieve self-flow by gravity. The piping should be embedded in the interlayer space to avoid exposure, which affects aesthetics and facilitates maintenance.

3. Functional System Integration

   • Water Supply and Drainage System: The inlet pipeline should be divided into branches for toilet flushing and hand washing, with independent valves to control the water volume. The drainage system should use U-shaped traps to prevent odors. Black water (fecal sewage) and gray water (hand-washing sewage) can be treated separately or discharged together.
   • Ventilation System: Install non-powered wind caps on the roof and louvered windows on the side walls to form a convection cycle. The air exchange rate should be ≥15 times per hour to avoid odor accumulation.
   • Electrical System: The wiring should be protected by waterproof sleeves, and the switches should be concentrated on splash-proof panels to prevent short circuits caused by rainwater or sewage splashing.

4. Environmental Adaptability Treatment

   • Winter Anti-freezing: Wrap electric tracing tapes around the pipelines, with the power calculated based on the pipe diameter and length to ensure that the sewage does not freeze in low-temperature environments.
   • Wind Prevention Measures: In windy areas, add wind-resistant guy wires at the four corners of the roof, with an inclination angle of 45 degrees to disperse the wind load and enhance structural stability.
   • Thermal Insulation Treatment: Apply a thermal insulation coating with a reflectivity >70% on the exterior of the roof to reduce solar radiation absorption in summer and decrease air conditioning energy consumption.

5. Operation Debugging and Verification

   • Water Pipeline Test: Pressurize the pipeline for 30 minutes. A pressure drop ≤0.5% is considered qualified, ensuring no leakage.
   • Electrical Test: The insulation resistance should be >20 megohms to ensure electrical safety.
   • Ventilation Efficiency: Conduct a smoke test, with a single air exchange time ≤4 minutes to verify the effectiveness of the ventilation system.
   • Durability Test: Continuously operate the flushing device 50 times to check the stability of mechanical components and avoid frequent failures.

Standardized installation can significantly reduce long-term operating energy consumption and failure rates, ensuring functional stability and resource utilization efficiency.