In 1980, PND began development of the OPEN CELL® structure with
construction of two temporary bridge abutments on the North Slope of
Alaska. The OPEN CELL bulkhead is used primarily on docks and similar
structures and provides low costs combined with high performance. The
system has been used effectively in locations that are susceptible to
severe ice, soft soils, deep water, scour, and seismic events. The OPEN
CELL provides high load capacity and requires minimal sheet pile toe
embedment. It is easily modified for increased loading or unforeseen
conditions, and accommodates long-term settlement.
The OPEN
CELL design provides cost savings for development in ordinary
conditions and provides savings that are particularly evident in
difficult environments (deep water, soft soils, etc.). The minimal cost
of the structure is a result of a straightforward design, a simplified
construction process, and low maintenance costs.
PND received
a NOVA award, presented by the Construction Innovation Forum, Inc., for
the OPEN CELL system. PND also holds patents on the system.
The
OPEN CELL sheet piles are vertically arranged driven flat sheet
pile-composed structures that act as membranes to retain soil, which
makes them perfect for civil and structural applications. PND has
provided design services utilizing OPEN CELL structures for numerous
bridges throughout the Pacific Northwest, Texas, and Alaska. OPEN CELL
SHEET PILE bridge abutments offer a multitude of advantages, including:
capacity for high loads; erosion/scour protection; ease of construction
and site adaptability; cost-effective design and construction; and
strength against extreme snow and ice conditions.