Bascule bridge with state-of-the-art safety technology

Project name: Hydraulic drive system for a bascule bridge
Industry sector: Civil Engineering
Technologies used: Hydraulic actuators and control unit, simulation

Safety for bascule bridge


The new bascule bridge across the IJssel in Holland is one of the first of its kind in Europe where the systematic approach of the Machinery Directive was implemented. Acting as project partner for the complete hydraulic system, Bosch Rexroth developed and implemented the standard-compliant safety concept for the drive system. Working together with the customer, Rexroth safety specialists reviewed the original risk analysis using the systematic approach outlined in “10 Steps to Performance Level”. This practical handbook helps implement the requirements for functional safety quickly and in line with applicable legislation and standards. It breaks the complex requirements down into manageable work packages, from risk analysis and concept development to implementation and validation.

The hydraulic system designed by Rexroth meets the required Performance Level PLe. And what's more: The concept reduced complexity because the required safety features are an integral part of the standard control unit.

The safety functions were already tested in the concept development phase using simulation programs developed in-house by Bosch Rexroth. They take into account the unique characteristics of fluid technology as well as external factors. This allowed Rexroth to test the behavior of the safety controls under full load and in unfavorable wind conditions. Once the bridge went into operation, the actual measurements completely confirmed the simulation results.

Advantages at a glance

  • Safety partnership throughout the entire duration of the project
  • Standard-compliant approach based on the guide entitled “10 Steps to Perfomance Level”
  • Integrated “Safety On Board” functions in standard control unit
  • Holistic simulation of the structure

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