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Tunnel Gas Measurements

In order to provide a safe working environment in tunnel constructions, protection against fire and explosion, prevention of accidents, prevention of health problems and occupational diseases caused by dangerous substances for workers are an inevitable necessity. In tunnel construction, it is also important to take the necessary precautions before some risks occur.

One of the biggest risks in tunnel constructions is the sudden risk of gas leaks or gases that accumulate over time and create life-threatening conditions for workers. In order to obtain accurate results from continuous measurements, it is necessary to know which toxic or flammable gases may be produced. In tunnel constructions, some gases are usually encountered between soil layers. These gas mixtures generally contain methane at around 90-95 by volume, carbon dioxide or hydrogen sulfide at around 2-4 by volume.

As well as during the construction of tunnels, hazardous chemicals such as carbon monoxide, carbon dioxide, sulfur dioxide, formaldehyde and nitrogen oxide are released during use. In addition, the oxygen concentration in the tunnels should be continuously controlled. Oxygen deficiency causes drowning and excess fire risk increases.

Methane gas (CH4) is the most frequently encountered and most risky gas in the construction of tunnels: Methane is an odorless, colorless and lighter than air. Moreover, it is highly flammable and causes explosion when mixed with air.

Carbon monoxide (CO) is a toxic, odorless, colorless and flammable gas. If carbon monoxide is inhaled, it replaces the oxygen in the blood. This causes the cells to die. May cause death if inhaled in large quantities.

Carbon dioxide (CO2) gas is odorless, colorless and heavier than air. If inhaled for a long time, this gas may also cause death.

Hydrogen sulfide (H2S) is a poisonous, smelly, colorless, heavier than air and flammable gas. Exposure to high concentrations will suppress the sense of smell of workers and may cause sudden death.

Our company performs tunnel gas measurements within the scope of gas measurements. In these studies In accordance with the relevant legal regulations, standards and test methods published by domestic and foreign organizations.

In the meantime, our organization, ÖSAS Accreditation Agency, Accredited according to TS EN ISO / IEC 17025 standard.