Design of Mobile Toilets in Huangshi Scenic Area

The design of mobile toilets in Huangshi Scenic Area requires comprehensive consideration of project site selection, functional standards, material selection, and the integration of modular design with the landscape. The specific design points are as follows:

1. Project Overview and Site Selection
As a national AAAA-level tourist attraction, Huangshi Scenic Area receives over a million visitors annually. Five new mobile toilets are planned to be built at the Mining and Metallurgy Grand Canyon Viewing Platform, the entrance to the Mining Expo Park, the Shihai Grand Oasis Visitor Center, the Mine Museum Square, and midway along the Jiulong Dongtian Trail. The total project area is approximately 200 square meters, with each toilet having a floor area of 15-25 square meters and a designed daily service capacity of 3,000 people. The site selection takes into account both visitor flow distribution and landscape harmony.

2. Design Standards and Functions
The toilet design must strictly adhere to the 'Urban Public Toilet Design Standard' (CJJ14-2016) and the 'Classification and Evaluation of Quality Grades for Tourist Toilets' (GB/T 18973-2016), achieving an AAA-level standard. Functional configurations include barrier-free facilities, a third toilet, and a mother-and-baby care station, meeting the needs of 800 people per day. Sewage discharge must comply with the 'Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants' (GB 18918-2002) Class I A standard to ensure environmental compliance.

3. Material Selection and Performance

• Frame System: Utilizes 8# channel steel welding, with columns made of 100×100×3mm galvanized square tubes and beams of 80×40×2.5mm rectangular steel tubes. Nodes are fully welded and coated with epoxy zinc-rich primer (dry film thickness ≥ 60μm) to ensure structural stability and corrosion resistance.
• Wall Materials: Selects 150mm thick metal carved panels (outer layer 0.3mm color-coated steel plate + middle layer 50mm polyurethane insulation layer + inner layer 0.2mm aluminum foil paper), featuring B1 fire resistance, water absorption rate < 3%, and 1.5kPa wind resistance. The surface is treated with a simulated rock texture to blend into the mining and metallurgy canyon landscape.
• Roof System: Adopts a three-layer structure (0.4mm color-coated steel plate + 30mm extruded polystyrene board + 0.3mm aluminum foil reflective layer) with a 5% slope and a 50mm drip edge at the eaves to balance drainage and insulation needs.
• Floor Materials: Uses 20mm thick anti-slip stone-plastic flooring (abrasion resistance ≥ 6000 revolutions), with a simulated antique copper finish. Joints are filled with epoxy resin, and an 80mm high water baffle is installed around the perimeter to prevent sewage overflow.
• Toilet System: Equipped with foam-sealed squat toilets (0.5L water consumption per use) and 304 stainless steel urinals (with automatic induction flushing). Sewage treatment employs a biodegradation integrated device (0.5m³/d treatment capacity), combined with MBR membrane bioreactor technology and a solar power supply system (2×250W photovoltaic panels + 200Ah battery), achieving energy conservation and environmental protection.

4. Other Design Points
The mobile toilets adopt a modular design, supporting rapid installation, disassembly, and relocation to adapt to the dynamic needs of the scenic area. The exterior design can be customized to combine urban characteristics with the surrounding environment, such as using simulated rock texture walls to echo the mining and metallurgy theme landscape, enhancing the overall image and visitor experience.