As engineers continue to understand cellular concrete and its variety of material properties, this material continues to be used more…
By Lucian P. Spiteri, P.E., Paul C. Schmall, Ph.D., P.E., Mark Gentile, P.E., and Michael A. Nuhfer, P.E. The OSIS…
Since their introduction, precast concrete segmental linings have continued to develop and evolve. In this article, Jon Hurt, Tunnels Practice…
Despite the fact that cellular concrete has been in the construction industry for nearly a century, it is not uncommon…
Microtunneling has been used in the United States since the mid-1980s as a means of trenchless pipe installation. In the…
By Barry L. Sorteberg Separation plants have historically been the bottleneck in many tunneling projects, resulting in lost time and…
By Glenn M Boyce, PhD, PE Shafts are the doorways to the underground, serving as the location at which all…
By Rob States, Dan McKinney and Bruce Dandie Standards and codes require that transit stations provide a safe environment for…