Retrofit, refurbishment

We analyse your ventilation system and provide a new ventilation design for safe and economic operation considering the current guidelines and requirements. For the refurbishment or optimisation of an existing ventilation system, HBI provides knowledge of specialists in various disciplines such as tunnel construction, control system, simulation, fire protection, mechanical equipment etc. We provide the adequate approach meeting the requirements of your tunnel project.

HBI Haerter Consulting Engineers conduct detailed analysis of aerodynamic coefficients of a tunnel, the ventilation system and the sensing elements. This is the foundation of the control and monitoring concept. The control usually includes following conditions:
Normal operation, for example unidirectional traffic, special case, for example oncoming traffic, event of fire and evacuation, event of fire and firefighting.

New or adapted norms and guidelines lead to changing requirements for tunnel constructions. Changes of the usage requirements can lead to new performance requirements. With the check of the functional and safety requirements of existing tunnels by HBI, the safety level is determined and the need for action and the measures to be realized are demonstrated.

HBI has the high level of competence and broad experience required to serve as an independent inspection entity. The service that includes assessment of the safety and scrutiny of the safety documentation is targeted to assist in particular the administrative authority. The EU-Directive 2004/54/EC dated 29 April 2004 on minimum safety requirements for tunnels in the trans-European road network prescribes that a safety documentation has to exist. Moreover, the organization shall consist of various entities with clearly defined roles and responsibilities: administrative authority, tunnel manager, inspections entity and safety officer.