Hechi Mobile Toilet Planning

The planning of mobile toilets in Hechi requires a comprehensive consideration of construction management plans, event demands, and site layout key points, ensuring scientific and rational design from overall planning to detailed design.

I. Policy and Event Demand Orientation

The 'Implementation Plan for Public Toilet Construction and Management' issued by the Hechi Municipal People's Government Office clearly states that from 2015, three years will be used to promote public toilet construction, focusing on addressing issues such as insufficient quantity, unreasonable layout, and outdated facilities. This policy provides a macro framework for mobile toilet planning, requiring the addition of mobile toilets in public areas (such as scenic spots, transportation hubs, and commercial districts) to make up for the coverage blind spots of fixed public toilets. Meanwhile, the placement of mobile toilets for large-scale events like marathons should focus on the experience of participants. Along the racecourse, environmentally friendly mobile toilets should be evenly distributed according to the density of participants, with intervals usually controlled between 500-1000 meters to avoid queues. Internally, they should be equipped with independent spaces, hand-washing facilities, and waste disposal devices. Some events add accessible toilets to meet special needs.

II. Core Principles of Site Layout

1. Terrain Selection
   Mobile toilets should be placed on flat ground with slightly higher terrain and good drainage. Low-lying areas are prone to water accumulation, which can seep into the toilet body, corroding the bottom frame or causing leakage from the waste storage tank. Uneven ground can cause equipment tilt and sewage backflow, shortening the service life. If placed on muddy ground, steel plates or cement pads should be laid to prevent the toilet body from sinking. On hardened roads, they can be placed directly without additional modifications.

2. Safety Distance from Surrounding Environment
   They should be kept at least 15 meters away from drinking water sources and food stalls to prevent contamination from fecal matter or disinfectants. They should be kept away from power distribution equipment and gas storage points to avoid safety hazards caused by liquid leakage. They should also avoid the main airflow direction of the site to prevent strong winds from accelerating the spread of odors and affecting the experience of surrounding people.

3. Adaptation to Pedestrian Flow Lines

   • Short-term high-density scenarios (such as music festivals and large-scale exhibitions): Adopt a zoned and dispersed placement strategy, setting up toilets at entrances/exits, audience areas, and dining points to disperse pedestrian pressure.
   • Long-term low-density scenarios (such as construction sites and scenic spots): Arrange them evenly along the activity flow lines. Construction sites need to set up one group each in the dormitory area and the construction area. Scenic spots should place them every 500 meters along the sightseeing trails to reduce round-trip distances.

4. Differentiated Layout by Type

   • Flush-type mobile toilets: Should be placed as close as possible to the passage for cleaning vehicles to facilitate regular fecal matter extraction.
   • Waterless ecological toilets: Have no requirements for transportation distance but need to ensure good ventilation at the placement points.
   • Smart landscape toilets: Should be preferably placed in corner positions with a flat view that do not block the core scenic spots, balancing aesthetics and practicality.