Allentown PA arena will use micropiles to mitigate sinkholes

January 4, 2012 rockman Project Related Comments Off on Allentown PA arena will use micropiles to mitigate sinkholes
Geotechnical investigation at proposed Allentown Hockey Arena

Geotechnical investigation at proposed Allentown Hockey Arena

An arena being built for the Philadelphia Flyers’ minor league affiliate hockey team will be founded on micropiles to mitigate possible sinkhole problems in the limestone bedrock. The arena in located at the site of a catastrophic collapse of a building, Corporate Plaza, in 1994. The collapse was blamed on sinkholes under the foundation that caused settlement and the rupture of a water main, flooding the area and exacerbating the issue. The building eventually had to be demolished. [Source: Morning Call via AGC SmartBrief. Image: CHUCK ZOVKO, The Morning Call]

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Pinkerton Tunnel
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Historic Pennsylvania Tunnel Reopens with Help From NCFI’s TerraThane Polyurethane Foam

January 26, 2016 rockman Press Releases Comments Off on Historic Pennsylvania Tunnel Reopens with Help From NCFI’s TerraThane Polyurethane Foam

Pinkerton TunnelMOUNT AIRY, NC—A $2 million tunnel construction project on the Great Alleghany Passage (GAP) is reopened to the public with help from a geotechnical polyurethane foam called TerraThane, by US company, NCFI Polyurethanes.

The GAP rail-trail is 150 miles of hiking and biking between Cumberland, Md, and Pittsburgh, Pa. created along the former railway line. In Cumberland, the GAP joins the C&O Canal Towpath, creating a continuous 335-mile long trail experience all the way to Washington, DC. It’s become a favorite biking destination for people from around the Mid-Atlantic states. One of its main tunnels, the Pinkerton Tunnel, an 849-foot former Western Maryland Railway tunnel, has been closed since 1975 due to erosion and unstable conditions. The Allegheny Trail Alliance, the organization that built and now maintains the 150-mile GAP, and the Somerset County Rails-to-Trails Association (SCRTA), wanted the tunnel reopened and helped fund the project.

[Editor] Click through for the rest of the press release from GeoPrac sponsor, NCFI Polyurethanes (makers of TerraThane). [/Editor]

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Nicholson Construction stabilizes pier on I-65 using micropiles and low-mobility grouting
Press Releases

Nicholson Completes Emergency Work on Indiana’s I-65

November 23, 2015 rockman Press Releases Comments Off on Nicholson Completes Emergency Work on Indiana’s I-65

Nicholson Construction stabilizes pier on I-65 using micropiles and low-mobility groutingPITTSBURGH, PA – Nicholson Construction recently completed emergency repair work to an unstable pier supporting a bridge on INDOT’s Interstate 65. These repairs enabled a 37-mile section of the highway’s northbound lanes to be reopened after a four-week closure.

The highway was in the process of being rehabilitated and widened when the pier was damaged by steel piles driven into the water tight ground below it. The pier began to settle and eventually rotated ten inches.

Nicholson developed a design-build solution that used micropiles to transfer the loads to more stable soils and low-mobility grouting to fill voids and densify the upper subsurface layer.

[Editor] Read on to hear more about Nicholson’s fix of this unstable bridge pier. [/Editor]

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Nicholson Completes Emergency Response Grouting Operation on Major Missouri Interstate with Minimal Traffic Impact

June 24, 2011 rockman Press Releases Comments Off on Nicholson Completes Emergency Response Grouting Operation on Major Missouri Interstate with Minimal Traffic Impact

Nicholson completed an emergency response jet grouting operation on Missouri's Gasconade Bridge, part of Interstate 44, in Laclede County.Pittsburgh, PA – June 2, 2011 – Missouri’s Interstate 44 is considered one of the most frequently traveled highways in the central United States. In early March of 2011, Nicholson Construction was contacted to perform an emergency response grouting operation on the Gasconade Bridge, part of I-44 westbound, over the Gasconade River in Laclede County.

During construction of the drilled shaft foundations for Temporary Bent No. 6, it was determined that voids were present both beneath and adjacent to the north footing for Intermediate Bent No. 6. Test borings by MoDOT indicated that the void varied in depth from zero to five feet, but the horizontal extents were unknown upon Nicholson’s arrival to the site. [Editor] Click through for the rest of the press release from GeoPrac.net sponsor Nicholson Construction. [/Editor]

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