KAPPIS - Irrigation of the A5 Motorway

Case Study

Traffic should flow freely again in 2008, when the large-scale project is due for comletion.
The Regional Council of Freiburg has to renew a water drainage canal and produce eight new rainwater clarifying tanks.

The construction engineers of KAPPIS Ingenieure GmbH from Lahr are specialised in building and civils and in surveying. They aim to provide innovative and cost-efficient solutions for the construction needs of their customers, as in the case of the irrigation and works supervision of the 22 kilometre section of motorway joining Switzerland and France. Commissioned by the Regional Council of Freiburg, KAPPIS Ingenieure GmbH supported the 50 million Euro construction project together with the Freiburg-based Braun Engineering  company, which contributed the irrigation concept and the rainwater clarifying tanks.  

Complete renewal of 22 kilometre motorway section

Construction work on this section of the A5 right next to the Rhine has been in full progress since 2005. The completion date of the large-scale project, and the end to the interruptions in the traffic flow, is scheduled for 2008. One of the objectives of the extensive project is to renew the pipework, which was built in the sixties and is meanwhile in a desperate state. Due to numerous leaks in the pipes and impacts due to crash barrier systems, the Regional Council of Freiburg has to renew a water drainage canal and produce eight new rainwater clarifying tanks. In addition, the side areas are being thoroughly sealed and the section will be given a completely new asphalt surface, as the concrete road surface is about 40 years old.  
“Three years may seem a long time to commuters who use this stretch of the motorway regularly. However, it’s an extremely tight schedule for engineers and construction workers“, reports Daniel Haberstroh, Project Controller of the Regional Council of Freiburg. “Don’t forget we are working on 500,000 square metres of road surface altogether. It will take 300,000 tons of asphalt to cover the former concrete road surface of the sixties.” As part of the A5 is right next to the river Rhine and there are ground water wells in the immediate vicinity, the motorway runs through official water preservation areas. In these areas, the surface water from the A5 has to be cleaned before it is channeled into the Rhine, which demands extreme accuracy on the part of the engineers and construction workers. “Our teams are not only toiling away on the building site during the week, but are also working all day Saturday to keep within the tight timeframe,” reports the project controller. As well as the side areas, asphalt seals have to be applied in the central strip of the road in water preservation areas to keep the drinking water clean.

Precise planning

Matthias Kappis, Manager of KAPPIS Ingenieure GmbH, and his team were supported in the design phase by the intelligent infrastructure software solution from the RIB company: “We used RIB software STRATIS with great success to produce the Deckenbuch = road surface database? as well as for irrigation and surveying,” says Kappis, who has 13 years of experience with the software system.  As the resurfacing of the road is a project concerning an already existing construction, the Lahr engineers were able to enter photographs of the existing concrete road surface into the surface database direct. Corresponding differences can easily be derived from the surface database, which is ultimately also an advantage for the company doing the construction work. “A topological plan is therefore not only useful for checking,“ explains qualified engineer Dietmar Boos of Kappis Ingenieure. “The software helped us to define the exact required height of the final road surface at different sections. Similarly, it also provided an easy way of accurately measuring the distances from the edge of the road,“ adds Kappis.

The company also made typical cross sections for various areas both inside and outside the water preservation area and was able to guide longitudinal pipes virtually round the foundations. “Another advantage for us is the possibility of generating Schachtgrafiken = manhole graphics?. The software tells us everything we need to know - diameters, material, coordinates, angles or junction height,” reports manager Kappis. Working with site plans used to take construction companies a great deal of time due to a lack of exact data such as angles.  Using the manhole graphics of STRATIS construction companies are able to pass on data to the manufacturer 1:1.

Efficient project handling

Through the software support, KAPPIS Ingenieure GmbH provided the construction companies with easy-to-read plans, enabling them to forge ahead with the project without any interruptions.  With the aid of a reliable, transparent solution it is easier for all those concerned to keep to the client’s schedule and re-open the optimised section of the A5 to traffic in autumn 2008. Due to the resurfacing of the motorway section, the region’s ground water protection has a secure future. 

Photos: KAPPIS Ingenieure GmbH

Industries>Infrastructure>Road Construction and Civil Engineering>KAPPIS Ingenieure

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