Streets

Drainage facilities in traffic areas (such as manhole tops) are often subject to high dynamic loads. In some sections where vehicles often pass at a high speed or heavy truck will pass, drainage facilities must have corresponding loading capacity to ensure long-term reliability.

Rainwater collected from streets usually contains some solids, such as leaves and sand. Therefore, excellent self-cleaning effect and drainage performance are essential for the collection of large amounts of rainwater.

Stormwater must be drained quickly from the streets to avoid influencing traffic or creating dangerous situations for vehicles. For example, impounded surface water may cause cars more likely to slip. Besides, stormwater tends to freeze in cold weather, thus pavement damages caused by penetration of stormwater should be prevented.

Stormwater collected from areas with different densities of traffic may contains various kinds of hazardous substance, for example, gasoline, zinc in tyre wear particles or copper in braking systems. In winter, de-icing salt will also lead to extra workload to stormwater cleaning system. Depending on types of stormwater contamination, different separators or filters can be selected for treatment.