NASTT’s 2018 No-Dig Show Call for Abstracts

The North American Society for Trenchless Technology (NASTT) is now accepting abstracts for its 2018 No-Dig Show in Palm Springs, California on March 25-29, 2018. Prospective authors are invited to submit a 250-word abstract outlining the scope of their paper and the principal points of benefit to the...

Continuous Improvement — Conveyor Belt Systems Aid in TBM Productivity

The invention of the tunnel boring machine has had a profound impact on the tunneling industry around the world. When conveyor belts were introduced, however, the speed and efficiency of the machine greatly increased.

Contracts and Risk, Building Blocks for Success

While there may be no “one size fits all” solution, there are several themes that need to be addressed to arrive at a contract suitable for a particular project.

Tunnel Updates

CALIFORNIA Los Angeles Crenshaw/LAX Walsh/Shea Corridor Constructors This $1.278 billion project for the Los Angeles Metropolitan Transportation Authority (Metro), being built by a joint venture of Walsh and Shea, is an 8.5-mile light-rail line that will run between the Expo Line on Exposition Boulevard and...

Multi-Modal Tunneling in Mexico

Mexico’s Túnel Emisor Poniente (TEP) II is a study in transitions—much of the tunnel travels through andesite with bands of tuff, below mountain ranges and through fault zones.

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