The SCADA system provides the opportunity for all system data in the tunnel to be exchanged with each other and performance of necessary transactions automatically or through user commands. The Tunnel Control Center possesses SCADA integration with which management and control of systems of the tunnels in the periphery can be made.
The user graphic interface (GUI) of the SCADA system is of a structure that is easy to use. All subsystems and user menus can be accessed in layers in this interface. Analysis of archives and certain future traffic related data can also be added to the software with modules. The tunnel center has hardware and software function including a (redundant) spare structure. In this way, the redundant server will automatically step in if a server in the center has a failure and continue the operation and management of the tunnel. Another important condition is backup of communication lines between the center of the tunnel and the units inside it. This provides that the system is effected with minimum operational loss in the event of failures that can occur in communication lines.
Especially the known protocols such as MODBUS, MODBUS TCP-IP, PROFIBUS among international communication protocols are used for PLC communication. The Guide for the Lighting of Road Tunnels and Underpasses published in 1990 with number 88 by the International Commission on Illumination (CIE) and the Technical reports of the European Commission named Tunnel Illumination dated 2003 and with code CEN CR14380:2003 have been taken as basis for design calculations of tunnel lighting. Lighting is provided in tunnel entries, inside the tunnel and tunnel exists in such a manner that there will not be any discomfort for the eyes of the drivers and will provide optimum vision. The Scada system views lighting levels with luminance meter and the lighting level that is most suitable for this is detected and taken into operation automatically.
PIARC-1995 and PIARC 2004 road tunnel standards and document based international criterion have been taken as basis. The aim of ventilation is to provide supply of clean air by decreasing to minimum amounts the exhaust gas in the tunnel, which are harmful for human health and to provide supply of clean air. It also sweeps away, the harmful gases created during fires, outside the tunnel.
NFPA 13-2003 the National Fire Protection Association, BS British Standards, PN 16 pressure class, the regulation dated 26.07.2002 about protection from fire plans fire systems by benefiting from three different detection systems; namely linear fire detection system, optic smoke detectors and temperature detection detectors with double principle and alarm buttons and fire cabinets door contacts.
Control units and PLC’s are used in the system in order to develop different operations according to different scenarios. In addition to transmitting data to the communication network, the PLC units also gradually share this data with PLC and controller units. In this way, the whole system becomes more reliable and is able to operate safely during emergencies.
• Electromechanic project design,
• SCADA programs,
• According to tunnel standards, local control of electro mechanic equipment data with each other or through the Tunnels Control Center automatically or through commands according to the authority level of the user is provided,
• Lighting System,
• Ventilation System,
• Testing and taking into operation of systems,
• Fire System
• The main purpose of applying regular preventive maintenance processes on the tunnel structure and systems is to create a safe and functional environment for the people working in or drivers traveling through the tunnels and extend the economic life of tunnels,
• By performing routine controls at certain time on electrical, electronic and electromechanical systems, potential failures can be eliminated thus healthy operation and long-life conditions can be provided.
• Repair of equipment and software failures as well as daily, weekly, monthly, three monthly, six monthly, yearly maintenance services.
• Management of all hotels from SCADA from the Tunnels Control Center,
• Monitoring of alarms received from tunnel cameras on a 7/24 basis and transmission of alarms received to the authorities of the department concerned and intervention,
• Uninterrupted 7/24 intervention to all incidents in the tunnel.