103 Category 2: Civil Structures 2 Contact Dipl.-Ing. André Henning Address Otto-Hahn-Strasse 7 48161 Münster, Germany Website www.roxeler.de The Roxeler Ingenieurgesellschaft (Roxeler Engineering Society) has been successfully working in engineering for more than 40 years. Our competences include designing civil, building, environmental and soil constructions. In order to create economic, aesthetic and sustainable solutions, we use complex finite element models and intelligent algorithms. Realistic discretisation of building design taking non-linear and time-dependent material laws into consideration provides scope for architectural design beyond normal limitations. Newly Built Bycicle Underbridge - Doetinchem, The Netherlands SE Owner Town Doetinchem Architect Aveco de Bondt General Contractor Van Boekel Zeeland bv Engineering Office Roxeler Ingenieurgesellschaft mbH Construction Period 05/2013 - 10/2013 The newly built bicycle underbridge passes under a busy main street in the town of Doetinchem in the province of Gelderland. The tunnel was formed using precast elements, weighing up to 50 t each. Geometrically, these elements are trapezoids with bore dimensions of 750 x 275 cm. The approach elements on both sides were also built using precast elements. All elements were sealed by grouting the joints. The soil had very low bearing capacity, which is why the elements were prestressed to make the tunnel less sensitive to different ground water levels or soil movement. Inside the passway, colour-variable lighting was installed, giving it the nickname of the “disco tunnel” in Dutch media. All precast reinforced concrete elements were designed using SCIA Engineer. They were individually calculated as frames. The design checks for the longitudinal prestressing within the highly loaded middle part were calculated by modelling the entire system in one finite element calculation. Construction / delivery: • Kleihues Betonbauteile GmbH & Co. KG (Germany) • Van der Linden Beton bv (the Netherlands) Roxeler Ingenieurgesellschaft
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