Conventional Tunneling in Urban Areas

Synopsis: Conventional tunneling as defined by ITA’s Working Group 19 is often referred to as New Austrian Tunneling Method (NATM); … Read more »

The Gateway Program – The Hudson River Tunnel Project in New York, New Jersey

Synopsis: The Northeast Corridor (NEC) represents one of the most heavily traversed regions in the United States. Between Amtrak and … Read more »

Design Guidelines for Sequential Excavation Method (SEM) Practices for Road Tunnels in the United States

Synopsis: In the last 20 years the Sequential Excavation Method (SEM) or the New Austrian Tunneling Method (NATM) has been … Read more »

Examination of Shotcrete Liner at Devil’s Slide Tunnel Utilizing ASTM 1550 Field Test Results and Back Analysis

Synopsis: The Devil’s Slide Tunnel project, located south of San Francisco along Highway 1, consists of twin bore tunnels approximately … Read more »

Selection of Alignment and Tunnelling Methods in Urban Settings

Synopsis: One of the challenges of the 21st century in urban settings is to provide solutions to increasing traffic.  The … Read more »