Procedures for risk analysis and management in tunnelling projects

Abstract

The concept of risk analysis and management has a big impact and application in various branches of society. Today in civil engineering, especially in infrastructure projects this concept represents a serious matter that should not be avoided or delayed. There are different approaches and definitions for a risk, but it is important every problem to be reviewed separately. In tunneling the uncertainties and risks are always present, so appropriate measures and management should be considered and implemented.

The Benefits of Uncertainty and Risk Assessment Studies on the M5 Metro Line (Istanbul - Turkey)

“…Due to a lack of awareness of the site's geological features and other unknowns, tunneling and underground construction are connected with inherent dangers. It is unavoidable that the geological conditions will not be fully understood before the tunnel is excavated, and even then, errors in estimating geological behavior can occur [30]. Tunnel and underground excavations can be complicated by poor geological conditions.…”

Evaluation of uncertainties in travertine rock mass for the Antalya (Turkey) Metro tunnel excavation

“…Geology is the principal source of uncertainty in geotechnical engineering. Unidentified ground characteristics may cause unforeseen behaviour, and identified characteristics may not be expressed in quantified terms or their behaviour is not fully known [29]. Geotechnical information is collected and evaluated, the greater the probability of profile correlation and change and the greater the cost savings.…”