Excavation support is a large part of what we do at H.B. Fleming, and we have the expertise and the equipment to install a broad range of structures. Each project has specific challenges with respect to excavation depth, water elevation, surcharge loads, working room for other trades, existing utilities, etc. Our in-house design staff are quick to deal with problems as soon as they arise to keep projects running.
Owner: Vermont Agency of Transportation (VTrans) Partner: S.D. Ireland Type: Richmond, Vermont Location: Merrimack, New Hampshire Project Description: HB Fleming installed a 240-foot sheet pile wall to support a 60-foot-deep excavation, next to fast-moving traffic on I-89. The sheet pile wall was designed to accommodate a future phase, in which the other side of I-89…
DetailsOwner: City of Portland Partner: Sargent Corporation Type: Excavation Support Location: Portland, Maine Project Description: Drove 1.8 million pounds of sheet pile up to 98 feet deep; installed 1.3 million pounds of internal framework. Challenge: The combined sewer overflow storage tank required excavating 36 feet below grade in soft soils next to an existing highway…
DetailsOwner: McNabb Properties Partner: Severino Trucking Type: Excavation Support Location: Portsmouth, New Hampshire Project Description: Installed 450 linear feet of shoring for a 25-foot excavation; installed and tested 59, 85-kip-capacity soil anchors; installed and tested 18, 85-kip-capacity rock anchors. Challenge: Plans for the proposed building called for excavating up to 20 feet below the bedrock…
DetailsOwner: Dartmouth College Partner: Turner Construction Type: Institutional Construction Location: Hanover, New Hampshire Project Description: H.B. Fleming installed 1,000 feet of shoring to support construction of a parking garage three stories below grade, with an engineering and science hall to be built on top. The project entailed driving 70-foot-long sections of sheet pile around the…
DetailsOwner: Bateman Partners Partner: Allied/Cook Type: Excavation Support & Pile Driving Location: Portland, Maine Project Description: For this massive, 2.5-acre urban development project, H.B. Fleming designed and installed 17 cofferdams, 500 H-Piles, and seven rock anchors. Challenge: The site was underlain by notoriously unpredictable, soft Presumpscot clay, and the deepest cut had to be 30…
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