everything about rail system…

Umbrella Arch

The umbrella arch is a temporary support system forming a structural umbrella from the insertion of an assortment of longitudinal support members installed from within the tunnel, above and around … Continue reading

Drill and Blast Method

Drill and blast method is mostly used method for the excavation throughout the world. The method can be used in all types of rocks and the initial cost is lower … Continue reading

Ground Anchor

A prestressed grouted ground anchor is a structural element installed in soil or rock that is used to┬átransmit an applied tensile load into the ground. Grouted ground anchors, referenced simply … Continue reading

Diaphragm Wall Construction

Diaphragm wall is a continuous wall constructed in ground in to facilitate certain construction activities, such as: As a retaining wall As a cut-off provision to support deep excavation As … Continue reading

New Austrian Tunneling Method (NATM)

The New Austrian Tunneling method (NATM) was developed between 1957 and 1965 in Austria. It was given its name in Salzburg in 1962 to distinguish it from old Austrian tunnelling … Continue reading