Bergen Tunnels Rehabilitation – A Success After All

Synopsis: 2001, the New Jersey Transit Authority commissioned the JV Merco-Obayashi with the rehabilitation contract of the approximately 130-year-old, 4,200 … Read more »

Comparison Of Predicted Versus Observed Structural Displacements Of Existing Structures At The Port Of Miami

Synopsis: The Port of Miami Tunnel Project is currently being constructed near downtown Miami, Florida to relieve congestion downtown due … Read more »

Considerations for Very Shallow Conventional (SEM) Tunneling in Urban Settings

Synopsis: Construction of shallow mined tunnels is frequently undertaken by use of conventional tunneling known as the Sequential Excavation Method … Read more »

Contractor Implementation of SEM Tunneling and Comparison Between Design and Observed Ground Conditions, Caldecott Tunnel Fourth Bore, San Francisco Bay Area, California

Synopsis: The Caldecott Tunnel Fourth Bore was mined using Sequential Excavation Method (SEM) tunneling. The SEM design identified 18 Rock … 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 »

Estimating Lateral Support Pressure for Rock Cuts at Washington-Dulles International Airport Expansion

Synopsis: Washington-Dulles International Airport (Virginia, USA) has been expanding its capacity since 1999. This expansion has required extensive vertical, open-cut … 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 »

Experience With Synthetic Fiber Reinforced Initial Shotcrete Lining At The Devil’s Slide Tunnel Projects

Synopsis: The conventional tunnel design of the Devil’s Slide Tunnel project near San Francisco, California anticipates relatively large deformation in … Read more »

FE Modelling for the Shallow Fort Canning Tunnel

Synopsis: The Fort Canning Tunnel, Singapore, is an approximately 15m wide vehicular tunnel that has been mainly constructed according to … Read more »

Fiber Reinforced Shotcrete for Tunnel Linings

Synopsis: The use of shotcrete for ground support is well established since several decades. However, the development of high quality … Read more »