Installation of Mobile Toilets at Construction Sites in Lanzhou

The installation of mobile toilets at construction sites in Lanzhou should follow scientific steps, combining material characteristics with environmental protection requirements to ensure efficient and stable operation of the facilities.

I. Installation Steps and Key Technologies

1. Site Selection and Positioning: Comprehensively evaluate ground flatness and drainage convenience. Prioritize areas with higher elevation and obvious drainage slopes to avoid water accumulation leading to foundation settlement.
2. Ground Foundation Treatment: Two methods are used: soil compaction or pouring a concrete cushion. Soil compaction is suitable for short-term use scenarios, while a concrete cushion (thickness ≥ 10 cm) is suitable for long-term or heavy-load requirements to ensure uniform load-bearing.
3. Main Frame Assembly: Color steel plates are connected to galvanized steel frames through embedded slots, with sealing strips filled at the joints to enhance waterproofing. If metal carved plates are used for wall panels, attention should be paid to the sealing connection with aluminum alloy doors; for structures with color steel plates having an outer layer of aluminum-zinc coating and an inner core of polyurethane foam material, the uniformity of the foam layer should be checked to avoid local voids affecting thermal insulation performance.
4. Internal Pipeline Installation: Follow the principle of "water supply downwards and sewage downwards." Water supply pipes are made of PPR material, which is corrosion-resistant and easy to connect; sewage pipes should maintain a slope of 2%-5%. A slope that is too small is prone to clogging, while a slope that is too large increases construction costs.
5. Electrical System Configuration: Install a separate leakage protection device. Lighting circuits should be concealed with PVC sleeves to avoid safety hazards caused by exposed wires. Ventilation windows should be equipped with insect screens, and exhaust fan interfaces should be reserved on the roof to ensure at least 6 air changes per hour and maintain internal air quality.

II. Material Selection and Environmental Protection Characteristics

1. Structural Materials: Hot-dip galvanized steel frames have strong corrosion resistance and are suitable for Lanzhou's dry climate; the outer layer of color steel plates with aluminum-zinc coating can extend service life, while the inner core of polyurethane foam material reduces the consumption of traditional building materials.
2. Functional Components: Toilet doors are made of aluminum alloy, which is lightweight and rust-resistant; ceilings use PVC suspended ceilings for easy cleaning; marble steps enhance durability but require anti-slip treatment.
3. Environmental Protection Design: The flushing system uses pneumatic or foot-operated devices to achieve on-demand water supply; sewage treatment is equipped with biochemical devices or microbial degradation technology to decompose organic matter into harmless substances, reducing the risk of secondary pollution; the mobile nature allows facilities to be relocated according to construction site needs, avoiding construction waste from demolition and reconstruction.

III. Facility Performance Evaluation Points

1. Installation Quality Standards: The horizontal error of the foundation should be controlled within three-thousandths; otherwise, it may cause uneven stress on the water tank and lead to cracks; the pipeline slope should strictly follow the 2%-5% standard to ensure smooth sewage discharge and water conservation.
2. Ventilation System Performance: Insufficient air changes will reduce the efficiency of microbial treatment, so regular inspection of the exhaust fan's operating status and the cleanliness of the insect screens is required.
3. Long-term Maintenance Recommendations: Check the aging of sealing strips monthly, clean sediment from sewage pipes quarterly, and perform anti-rust treatment on steel frames annually to extend the service life of the facilities.