Basics Road and track drainage
Roads and tracks connect people and keep life running. In addition to providing supply and disposal and communication facilities, roads and tracks are the third pillar in our technical infrastructure.
Current situation in Germany
Road inspections have revealed that between 30 % and 40 % of all German roads are currently damaged or in need of repairs. Considering the rapid growth of mobility, using the road network involves potential risks and more damage will affect infrastructure.
Causes of road damage
In addition to normal, age-related wear and tear and the constantly increasing traffic volume, for which many roads have not been designed, improper drainage is one of the main reasons for road damage and impairment of roadworthiness.
Road and track drainage
Due to limited public funds, it becomes increasingly difficult to maintain roads and tracks in a sound and roadworthy condition. Preventive measures can sustainably improve the quality and safety of the road network. Having a proper and working drainage is one of the most important requirements for safe usability and the life of roads and tracks.
Challenges and goals
Drainage systems help to collect and release surface water (danger due to aquaplaning, ice), water from the soil or road superstructure (danger due to frost damage) and from water coming from outside. Drainage and transport pipes are used to collect and route or discharge different types and amounts of water.
Studies and evaluations have revealed that the majority of road construction measures will focus rather on repair or extension (expansion and improvement) of the existing network than on new constructions. This leads to high demands on construction companies and products to be used. Efficiency, rapid construction progress while maintaining traffic flow, and cost reduction while at the same time maintaining quality standards are essential in today's road and track construction. Modern drainage systems require durability, high load capacity, easy handling and inspection-friendliness.
EBA-certified overall system for any application in track drainage
The RailPipe system, consisting of drainage pipe and flushing and inspection shaft, is the first structured-wall pipe system to meet all the standards and requirements of Deutsche Bahn AG and the German Federal Railway Authority (Eisenbahn-Bundesamt, EBA) and can therefore be used for all pressure ranges of the roadbed and track.
Standards and Guidelines
Proper road and track drainage is regulated by different standards and directives. Below is a summary of the most important standards and guidelines.
The most important standards and directives for road and track drainage
DIN EN 4262-1
"Pipes and fittings for subsoil drainage of trafficked areas and underground engineering – Part 1: Pipes, fittings and their joints made from PVC-U, PP and PE". („Rohre und Formstücke für die unterirdische Entwässerung im Verkehrswege- und Tiefbau – Teil 1: Rohre, Formstücke und deren Verbindungen aus PVC-U, PP und PE")
DIN 4262-1 is the basic standard for drainage and transport pipes in the drainage of trafficked areas. It applies to subsoil pipes and fittings made from thermoplastics and their joints used in the drainage of trafficked areas and underground engineering to collect, discharge and infiltrate surface and infiltration water using gravity.
DIN EN 13476-3
"Plastic piping systems for non-pressure underground drainage and sewerage – Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE), Part 3: Specifications for pipes and fittings with smooth inernal and profiled external surface and the system, Type B" („Kunststoff-Rohrleitungssysteme für erdverlegte drucklose Abwasserkanäle und -leitungen – Rohrleitungssysteme mit profilierter Wandung aus weichmacherfreiem Polyvinylchlorid (PVC-U), Polypropylen (PP) und Polyethylen (PE)-Teil 3: Anforderungen an Rohre und Formstücke mit glatter Innen- und profilierter Außenfläche und an das Rohrleitungssystem, Typ B")
"Plastic pipes for use in track drainage" („Kunststoffrohre für die Verwendung zur Entwässerung von Bahnanlagen") (application: railway).
The most important standards and directives relating to planning, dimensioning, installation
"Directive relating to road construction – Part: drainage" („Richtlinie für die Anlage von Straßen – Teil: Entwässerung"): In Germany road drainage systems are planned based on RAS-Ew. The standard defines state-of-the-art technology and contains planning basics, dimensioning notes and general suggestions for road drainage solutions, including the treatment of surface water.
"Drainage systems – Basics" („Entwässerungsanlagen – Grundsätze") (application: railway)
DWA-A 118 worksheet
"Hydraulic dimensioning and verification of drainage systems" („Hydraulische Bemessung und Nachweis von Entwässerungssystemen")
DIN EN 1610
"Construction and testing of drains and sewers" („Verlegung und Prüfung von Abwasserleitungen und –kanälen")
DWA-A 139 worksheet
"Installation and testing of drains and sewers" („Einbau und Prüfung von Abwasserleitungen und –kanälen")
ZTV A-StB 97
"Additional technical terms of contract and guidelines for earthworks in trafficked areas" („Zusätzliche Technische Vertragsbedingungen und Richtlinien für Aufgrabungen in Verkehrsflächen")
ZTV Ew StB 91
"Additional technical terms of contract and guidelines for the construction of drains in road construction" („Zusätzliche Technische Vertragsbedingungen und Richtlinien für den Bau von Entwässerungseinrichtungen im Straßenbau")
ATV-DVWK-A 127 worksheet
"Static calculation of drains and sewers" („Statische Berechnung von Abwasserkanälen und –leitungen")
DIN EN 752
"Drain and sewer systems outside buildings" ("Entwässerungssysteme außerhalb von Gebäuden")