Storrow Drive, a parkway along the Charles River in Boston, carries more than 100,000 vehicles per day. The tunnels provide access to city streets, and are constructed of reinforced concrete sections with concrete-slab roofs that are supported by...
Expansion of the Minera Escondida copper mine included constructing a corrugated steel structural plate arch tunnel. The tunnel acts as a buried bridge to carry a haul road over the mine’s conveyor system. During construction of the...
A conveyor belt runs along one of the canyon benches at the copper mine. The upper slope of the canyon was undergoing a slow and predictable landslide transverse to the conveyor belt. To protect the conveyor belt from falling debris due to the...
Constructed in the 1950s and carrying over 100,000 vehicles per day, the Storrow Drive Interchange is a major commuting route and link to Back Bay. The interchange includes two reinforced concrete tunnels with steel-framed and reinforced...
The Central Artery/Tunnel (CA/T) Project relocated Boston’s elevated Central Artery below ground. Systemic water leakage at the tunnel roof to slurry wall intersection created a long-term corrosion threat to the roof girders and...
Portions of the Hynes Convention Center (Hynes) are located directly over I-90, the Massachusetts Turnpike. A fifty-year-old, cast-in-place concrete slab suspended from the underside of the Hynes served as the ceiling for the western...
The Central Artery/Tunnel (CA/T) Project relocated Boston’s elevated Central Artery below ground. The CA/T tunnel walls used soldier pile tremie concrete (SPTC) slurry walls as a component of the final structure. During later stages of...
The US-41/M-28 Access Management Plan sought to improve access along the corridor. One such improvement included the construction of a pedestrian tunnel under US-41/M-28 to replace an existing overpass in Chocolay Township. The pedestrian tunnel...
The modernization of Logan International Airport included the new I-90/Route 1A Interchange. SGH assisted several contractors that looked for assistance with understanding the complex system of reinforcement, post-tensioning ducts and anchorages...
By: Cory Brett, Sanayei, Masoud, Kayiparambil P., Anish, Moore, James A.
Buildings located close to transportation corridors experience structure-borne sound and vibration due to passing traffic which can be disruptive to operation of sensitive equipment in manufacturing, and medical facilities. Structure-borne sound...
Abstract: The Hynes Convention Center is located in the heart of Boston’s historic Back Bay neighborhood. Portions of the Hynes are located directly over I-90, the Massachusetts Turnpike. A 50-year-old cast-in-place concrete slab, suspended...
Abstract: Our practice in forensic engineering often includes investigating the causes of reported problems, documenting the extent and types of problems found, developing repair solutions, implementing a pilot (mockup) repair program, and...
By: Brent Bass, McGrath, Timothy J., Mailhot D., Lim K.W.
Abstract: Thermoplastic chambers for stormwater retention applications have been in use for many years. One design, an arch-shaped chamber with a 51 in. nominal width and a 30 in. nominal height, has seen widespread acceptance. This paper reports...
Abstract: More than 47,000 culverts have been installed under the highways of Utah. The Utah Department of Transportation (DOT) maintains these culverts but has no comprehensive system for assessing condition and planning maintenance activities....
Abstract: DOTs are interested in developing guidelines for use of large diameter corrugated HDPE pipe buried under roadways with shallow fill, but this application has not been studied extensively. A pooled fund study consisting of full-scale...
Abstract: AASHTO introduced the AASHTO "LRFD Bridge Design Specifications" in 1994. These load and resistance factor design (LRFD) specifications included new provisions for distributing live loads to reinforced concrete bridge decks...
Abstract: The Utah Department of Transportation installed and manages over 47,000 culverts but has no comprehensive, quantitative method for evaluating the performance of these culverts. UDOT initiated a study to assess culverts throughout the...
Abstract: The Utah Department of Transportation installed and manages over 47,000 culverts but has no comprehensive, quantitative method for evaluating the performance of these culverts. UDOT initiated a study to assess culverts throughout the...