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 »

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 »

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 »

History and Recent Developments in Soft Ground NATM Tunneling for the Washington, D.C. Metro

Synopsis: The first application of soft ground NATM in the US was on Washington, DC Metro’s Section E5 Fort Totten … Read more »

Implementation of Conventional Tunneling in a Design-Build Contract in the US

Synopsis: Historically, conventional tunneling also referred to as NATM and more recently SEM in the US has been executed in … Read more »

Lessons Learned from NATM Design and Construction of the Caldecott Fourth Bore

Synopsis: The Caldecott Fourth Bore is a 15.2 m wide (50 ft), 1,036 m long (3,399 ft) highway tunnel with … Read more »

Modeling of Pipe Arch Canopies in Shallow Soft Ground Tunnels Constructed by Sequential Excavation Methods

Synopsis: The New Austrian Tunneling Method (NATM), also referred as Sequential Excavation Method (SEM), has found application in soft ground … Read more »