How to design a storm water system for major highways
The design of storm sewers for major highways is a complex engineering process that takes into account high flows of rain and meltwater, the load from heavy traffic and the safety of the surrounding areas. The main purpose of such a system is to ensure fast and safe drainage of water, protect road foundations, bridges and overpasses from destruction, as well as prevent flooding of streets, pedestrian zones and underground utilities.
The main stages of design
1. Collection of initial data and analysis of the territory
The project begins with an assessment of the catchment area, topography, and soil characteristics. It is necessary to take into account the slopes of the highway, the location of bridges and interchanges, as well as existing drainage systems.
• Analysis of precipitation intensity and forecast of peak flows allows you to determine the network capacity.
• The study of existing utilities and underground networks prevents intersections and conflicts during pipe laying.
2. Bandwidth calculation
Based on the collected data, the diameter of the pipes and the section of the trays are determined. The calculation includes peak water consumption during high-intensity downpours to avoid overflow of sewers and flooding.
• The capacity should ensure the discharge of water, taking into account the intensity of traffic and the planned expansion of the highway.
• The calculation is carried out using hydraulic formulas and modern programs for modeling water flows.
3. Selection of system elements
Storm sewers include rain collectors, trays, collectors, sand traps and filters. Large rain collectors and trays capable of withstanding high flows are designed for highways, and pipes are positioned with a sufficient slope for the gravity movement of water.
• Rain collectors and trays are located taking into account the places of concentration of effluents: at exits, intersections and low-lying areas.
• Sand traps are installed to trap large suspended particles and protect the pipeline from clogging.
4. Organization of water drainage and accumulation
For large highways, backup water storage systems and overflow chambers are used, which allow unloading the network in extreme precipitation.
• Storage tanks retain excess runoff and prevent overloading of collectors.
• Overflow channels direct water to safe reservoirs or existing urban drainage systems.
5. Control and operation
The project provides access for inspections, flushing of pipes and cleaning of rain collectors. Monitoring systems and level sensors for operational wastewater management are also being implemented.
Efficient storm system design