Dali Mobile Toilet Construction Plan

The construction plan for mobile toilets in Dali should be implemented scientifically in stages, taking into account project positioning, site conditions, and environmental protection requirements. Details are as follows:

I. Construction Deployment and Site Preparation

1. Objectives and Principles
   Set "four compliance" objectives: quality (main structure wind resistance ≥ Grade 8, waterproof without leakage), safety (zero casualties, no risk of collapse), schedule (delivery within 72 hours), and environmental protection (noise ≤ 60 decibels, 100% waste classification). Construction follows the principle of "underground before above-ground, main structure before decoration" to avoid rework.
2. Site Survey and Treatment
   Use a total station to measure ground flatness and inspect underground cables, water pipes, and other facilities. Given the characteristics of Dali's soft soil with high water content (about 30%) and shallow groundwater level (about 1.5m), it is necessary to lower the water level through dewatering wells or blind ditches to ensure construction safety.

II. Construction Process and Key Technologies

1. Location Planning
   Prioritize areas with good drainage, where the groundwater level should be at least 1.5 meters below the toilet pit bottom. For scenic spots and other locations, it is recommended to build on the downwind side to reduce odor impact.
2. Main Structure Construction
   • Prefabricated panel house type: Modular steel structures or composite panels are assembled on-site, suitable for rapid installation.
   • Brick-concrete structure: Use 18-wall or 12-wall masonry with a red brick to cement ratio of 3:1 to ensure structural stability.
   • Wilderness scenarios: Use waterproof canvas + steel frame construction, equipped with collapsible toilets.
3. Installation of Supporting Facilities
   • Electrical system: Wiring should comply with safety regulations, sockets should be equipped with waterproof boxes, and solar lighting is recommended to reduce costs.
   • Water supply and drainage system: PVC pipes should have a slope of ≥2%, and U-shaped traps should be installed to prevent odors.
4. Sanitation Treatment System
   • Septic tank: Adopt a three-chamber treatment method, with the first chamber for fermentation for 60 days, the second chamber for sedimentation for 30 days, and the third chamber for fertilizer. For construction site toilets used by an average of 100 people per day, each chamber should have a volume of ≥2 cubic meters.
   • Fecal waste treatment: Add EM bacteria to accelerate decomposition, spray lime to adjust the pH value to above 11 for sterilization. In northern regions, buried pipes should be wrapped with a 3cm polyurethane insulation layer to prevent freezing; in arid areas, waterless composting toilets can be used, combined with wood chip coverage to achieve zero emissions.

III. Resource Allocation and Customized Services

1. Materials and Equipment
   According to the climatic characteristics of Dali, steel structure modules require anti-corrosion treatment, and solar panels require wind-resistant design. Special trades (electricians, welders) must be certified.
2. Local Suppliers
   • Xuhu Environmental Protection Equipment Co., Ltd.: Supports theme sticker customization to match scenic spot styles, with warehousing and transportation covering major areas of Dali.
   • Dali Jinhong Mobile Toilet Rental Co., Ltd.: Provides high-end environmentally friendly restrooms made of imported plastic materials, with an aesthetically pleasing and comfortable appearance.
   • Yunnan Suitian Environmental Protection Engineering Company: Offers full-process services, including design, installation, commissioning, and after-sales maintenance support.

IV. Precautions

During construction, pay attention to weather changes and take measures to prevent rain, heatstroke, and typhoons. When selecting suppliers, focus on examining the environmental friendliness of materials, transportation convenience, and after-sales response speed, and match appropriate configurations according to scenic spots, construction sites, and other scenarios.