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Public commuter transportation represents the central element of the urban infrastructure. Incidents involving violence, damage to property and vandalism in buses and trains as well as at stops can...

The State of Qatar is pursuing an ambitious vision destined to provide the highest standards of living to the country by the year 2030. An important component for this is a modern transport...

Fire services often have to counter the view that they are incapable of doing anything at all when confronted with a tunnel fire. This expectation relates to extreme major fires, in the case of which...

2014 marks a key year for underground works in Qatar, with projects such as the Doha Metro, Sharq Crossing and IDRIS (Inner Doha Re-sewerage Implementation Strategy) entering critical stages. Click for further information.

The metro system, nearly entirely underground, involves the use of dozens of mixed ground EPB TBMs: the largest simultaneous construction by TBM that has ever taken place in the city. The compact...

Three significant factors diminish the bearing capacity of the structure and hamper stability in the event of a tunnel fire: Explosion-like spalling caused by immense heat development and the...

The drainage system of Mexcico City's metropolitan region is no longer sufficient to maintain an adequate water discharge, especially due to the increasingly unfavourable gradient of the Emisor Central wastewater tunnel, caused by the sinking process. To back up the old drainage system the construction of the Tunel Emisor Oriente (TEO), with a length of 62 km and an average diameter of 7 m began in 2008. The work schedule for the tunnel has a final completion date of June 2015.

An increasing number of clients are calling on contractors to carry out cover measurements in concrete for reinforced concrete elements and engineering structures. At the same time, clients too are...