Construction of Mobile Toilets in Qinghai Scenic Areas

The construction of mobile toilets in Qinghai scenic areas requires comprehensive control throughout the entire process, from design, material selection, and construction to management, taking into account the characteristics of the plateau climate. The specific key points are as follows:

1. Project Planning and Type Adaptation The project covers high-altitude scenic areas such as Qinghai Lake and Chaka Salt Lake, as well as the Sanjiangyuan Nature Reserve. Three types of toilets need to be planned according to usage scenarios: standard scenic area type (3-5 toilet stalls), enhanced highway service area type (8-10 toilet stalls), and eco-protection zone environmentally friendly type (2 toilet stalls). The design must meet requirements for wind resistance of at least grade 10, cold resistance down to -30°C, and altitude adaptation from 3000 to 4500 meters. Female toilet stalls should account for 60% of the total, and one accessible toilet stall should be provided for every 10 stalls, balancing practicality and fairness.

2. Plateau Adaptability of Materials and Equipment The main structure uses polyurethane sandwich color steel plates, and the concrete foundation's buried depth should be adjusted according to the thickness of the permafrost layer (approximately 1.2 meters along the shores of Qinghai Lake and up to 2.0 meters in the Qilian Mountains). Pipes should be made of 304 stainless steel and wrapped with a 50mm centrifugal glass wool insulation layer to prevent freezing and cracking at low temperatures. The heating system should combine wall-mounted diesel heaters (starting at -25°C) with underfloor heating coils to ensure indoor temperatures of 12-18°C in winter. The eco-protection zone type should be equipped with diffuse oxygen supply equipment to maintain an oxygen concentration of 23-25%.

3. Modular Construction and Insulation Technology The main structure should be assembled using modular components, with high-strength galvanized bolts and sealing gaskets at connection points. Electrical wiring and water supply and drainage pipes should use quick-connect interfaces to improve construction efficiency and reduce leakage risks. The wall insulation layer should adopt a multi-layer composite structure, with an outer layer of color steel corrugated plates and an inner layer of polyurethane foam, fixed through physical anchoring and chemical bonding to avoid cold bridges. The composite process should be completed in a constant temperature and humidity environment to ensure uniform foaming.

4. Sewage Disposal and Intelligent Systems The negative pressure sewage disposal system relies on a micro vacuum pump to generate constant negative pressure, transporting waste through dedicated pipes to collection containers. The key is to maintain system tightness. Sewage treatment should use MBR membrane bioreactor technology or buried integrated equipment, with emissions meeting Class A standards. The intelligent monitoring network should integrate odor concentration, liquid level, and temperature and humidity sensors, collecting data in real-time through the Internet of Things to optimize maintenance cycles.

5. Construction Process and Precision Control The construction process includes site clearing, foundation treatment, steel structure erection, equipment installation, detail work (such as doors, windows, and waterproof layers), pipe connections, and trial operation. After completion, three-dimensional laser scanning detection should be conducted to compare with the design model, focusing on checking verticality deviations, joint flatness, and equipment positioning accuracy. Airtightness testing should use a micro differential pressure gauge to measure key parts to ensure compliance with standards.

6. Long-term Management and Maintenance After the toilets are completed, they should be handed over to the local government for management, implementing the principle of 'who benefits, who maintains.' A sound system for daily cleaning and inspection and maintenance should be established, with regular facility inspections to ensure long-term operation.