Installation of Mobile Toilets in Yulin Scenic Area

The installation of mobile toilets in Yulin scenic areas should adhere to modular design standards, taking into account geological and climatic characteristics, and ensuring stability and functionality through standardized construction processes.

1. Design Standards and Engineering Planning

Mobile toilets in Yulin scenic areas adopt a modular design. Taking Jingbian Wave Valley scenic area as an example, the plan is to construct six mobile toilets with a total floor area of 300 square meters. Each toilet measures 5m×3m×2.8m (length×width×height) and includes three squatting stalls, one accessible restroom, and one management room. The design fully considers local geological conditions (such as loose sand layers) and climatic features (wind resistance, low-temperature resistance, water conservation, and environmental protection). For instance, the thickness of the roof insulation layer must meet the requirements of low-temperature environments, and doors and windows are made of thermal-break aluminum double-glazed windows to enhance sealing performance.

2. Construction Preparation and Site Treatment

1. Geological Survey and Foundation Design: The bearing capacity of the foundation must be tested. For areas with loose sand layers, graded sand and gravel replacement with layered compaction should be used. The foundation is a prefabricated reinforced concrete strip foundation with a burial depth of 1.2m (below the local frost depth) to ensure frost resistance and stability.
2. Technical Preparation: Organize drawing reviews, prepare specialized construction technical documents, and clarify parameters such as steel structure welding processes (e.g., three-sided welding), waterproof coating thickness (e.g., roof ≥1.5mm), and equipment installation accuracy (e.g., horizontal deviation ≤2mm).
3. Site Preparation: The installation location must meet geological bearing capacity requirements, with a site flatness error ≤50mm and a slope ≤3%. If these standards are not met, graded sand and gravel should be used for layered backfilling and compaction.

3. Key Points for Main Structure Construction

1. Steel Structure Installation: Factory-prefabricated H-shaped steel frames are used and connected on-site with high-strength bolts, with strict control over installation deviations. Steel wire rope diagonal anchors are installed at the four corners to enhance wind resistance.
2. Enclosure Structure Installation: Wall panels are tongue-and-groove polyurethane sandwich panels, with fire-resistant sealant filling the panel joints. Doors and windows are made of thermal-break aluminum to ensure thermal insulation and sealing performance.
3. Welding Process: The frame and foundation embedded steel plates are connected using three-sided welding. After welding, non-destructive testing (e.g., ultrasonic testing) is conducted to ensure defect-free welds.

4. Material and Equipment Installation Specifications

1. Main Materials: Q235B square steel, metal carved panels, color-coated steel corrugated sheets, etc., must meet wind resistance, corrosion resistance, and fire resistance technical standards.
2. Sanitary Equipment: Ceramic squatting pans, stainless steel handwashing basins, microbial degradation tanks, etc., must meet water conservation (e.g., single flush volume ≤4L) and environmental protection requirements. Microbial degradation tanks require regular maintenance to ensure treatment efficiency.

5. Installation Precautions

1. Foundation Stability: It is essential to ensure that the foundation bearing capacity meets standards to avoid toilet tilting or structural damage due to settlement.
2. Environmental Adaptability: Strictly implement design details for waterproofing (e.g., roof slope ≥5%), wind resistance (e.g., anchor spacing ≤3m), and cold resistance (e.g., foundation burial depth ≥frost depth).
3. Equipment Accuracy Control: Parameters such as horizontal deviation and verticality must comply with specifications. For example, the installation height error of squatting pans should be ≤±5mm to ensure user comfort.