Over the last decade, pipe bursting has been increasingly accepted by project owners as a less costly, less disruptive alternative to open cut trenching for replacing underground utilities. “In ...

A new type of parallel operation unit for excavating and supporting anchors is proposed to address the issue of imbalanced excavation anchor ratio in coal mines. By equipping a straddle type anchoring ...

Crews discovered an 8-inch steel pipe protruding through one of the openings of Bertha the tunnel boring machine today. The Seattle Tunnel Partners aren't ready to say exactly what is blocking Bertha, ...