Installation of Mobile Public Toilets in Qinghai

The installation of mobile public toilets in Qinghai requires comprehensive consideration from multiple aspects such as environmental adaptability, structural design, and system configuration. The specific key points are as follows:

1. Analysis of Installation Scenario Adaptability

It is necessary to evaluate the surface bearing capacity, the depth of the underground permafrost layer, and seasonal wind variations. For example, in areas with deep permafrost layers, it is essential to ensure that the foundation depth exceeds the permafrost line to prevent structural deformation caused by frost heaving of the foundation. For color-coated steel materials, the coefficient of thermal expansion and contraction must be accurately calculated to avoid loosening of connection points due to excessive temperature differences.

2. Modular Assembly and Connection Technology

The main structure adopts modular assembly, with high-strength galvanized bolts and sealing gaskets used at connection points, strictly adhering to torque control standards to prevent loosening. Electrical wiring and water supply and drainage pipes utilize quick-connect interfaces with anti-leakage and anti-freeze crack designs to ensure normal operation in low-temperature winter environments.

3. Composite Insulation Layer Technology

The wall adopts a multi-layer composite structure: the outer layer is an anti-ultraviolet, low-temperature-resistant aluminum-zinc-plated base color-coated steel plate (thickness ≥ 0.4mm), and the inner layer is filled with flame-retardant polyurethane foam (thickness ≥ 50mm), fixed through a combination of physical anchoring and chemical bonding to prevent cold bridge phenomena. The seams are treated with continuous welding technology and special sealing glue to enhance airtightness.

4. Sewage System Design

• Areas without municipal sewage networks: Self-circulating or negative pressure collection systems are adopted. Negative pressure sewage disposal relies on a miniature vacuum pump to maintain airtightness, with waste transported through dedicated pipes to an insulated collection container equipped with an electric heating belt to prevent freezing.
• Improvements to traditional water flushing systems: In areas prone to freezing in winter, foam sealing or vacuum collection systems are used instead. The buried part of the drainage pipes is deeper than the permafrost line, with a reserved slope and anti-freeze protective layer.

5. Energy Supply and Intelligent Configuration

• Photovoltaic integration: Custom-bracketed photovoltaic panels are installed on the roof, with energy storage devices using low-temperature lithium battery packs equipped with intelligent charge-discharge controllers to automatically adjust power supply strategies based on usage frequency.
• Intelligent monitoring: Sensors for odor concentration, liquid level, temperature, and humidity are deployed, with real-time data collection through low-power IoT modules to achieve fault warnings and precise resource allocation.

6. Installation Accuracy and Acceptance Standards

After construction is completed, three-dimensional laser scanning detection is required to compare with the design model, focusing on detecting verticality deviations, seam flatness, and equipment positioning accuracy. Simultaneously, specialized airtightness testing is conducted to ensure structural stability and system reliability.