Groundwater: For Tunneling, It’s All about Control

Groundwater will go where it wants to go and will exert hydrostatic pressure at the most inconvenient locations. Effective groundwater control is, therefore, one of the key factors to a successful tunneling project.

A Change of Conditions: Risk Management in Tunneling from the TBM Manufacturer’s Perspective

Let’s face it: tunneling projects are inherently risky. The actual geology can harbor unforeseen conditions even with rigorous testing. In TBM-driven tunnels, the machine and the crew operating it are key components of the risk management strategy. So, how can we ensure that the operation is done effectively as often as possible?

Jacobs Engineering to Acquire CH2M

Jacobs Engineering Group Inc. (NYSE: JEC) and CH2M HILL Companies Ltd. announced Aug. 2 that they have entered into a definitive agreement under which Jacobs will acquire all of the outstanding shares of CH2M.

Tunnel Achievement Award – Blue Plains Tunnel

Sewer utilities are not often among those who shake the foundation of conventional thinking. DC Water, however, took a new approach to constructing its Blue Plains Tunnel and proved that utilities can also be innovative and creative.

Herrenknecht TBMs Tunneling Under LA

Los Angeles, the City of Angels, suffocates in traffic during rush hour. For this reason, the Los Angeles Metropolitan Transportation Authority (Metro) is pushing ahead at full speed with the expansion of local transport links. In the coming years, the existing metro rail network will be expanded in a number of different places.

Herrenknecht TBM Constructs Large Road Tunnel in Switzerland

The shell of the Belchen rehabilitation tunnel has been completed. Tunneling ended successfully in Eptingen, Switzerland, on June 21, 2017.

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