Earth retention

Our earth retention systems can be designed to meet your specific needs, either for permanent or temporary applications.

Sheet piling

Sheet piling is used for seawalls, breakwalls, cofferdams, retaining walls and earth retention systems. Sheet piling is typically installed using vibratory and/or impact pile hammers. Sheet piling is used in both permanent and temporary applications.

Sheet piling come in a variety of shapes with the most common being Z-shaped. The sheets interlock using a wide variety of interlocks such a ball and socket, double hook, hook and grip, thumb and finger, etc.

Depending upon retained wall height, soil conditions, ground water, loading requirements, sheet pile walls can be cantilevered for shallower retained wall heights, internally braced or tied-back.

Internal bracing generally consists of walers, struts, corner braces, and rakers. Tieback systems can consist of walers, grouted tiebacks/earth anchors, helical tiebacks, or deadman systems.

Soldier Piles & lagging

Soldier piles and lagging is an earth retention system used to retain soil for deep excavations. Soldier pile systems are constructed by driving a series of steel H-piles into the ground at typical 6 to 8-feet horizontal centers. These soldier piles can be installed using vibratory or impact pile hammers, or in cases where ground vibrations need to be minimized, by predrilling 18” to 30”-diameter holes vertically into the ground, setting the steel soldier piles into the center of the hole, and encasing the toe of the piles in grout or concrete.

Once the soldier piles are installed, mixed hardwood lagging boards are installed between the soldier piles as the excavation progresses down.

Depending upon design requirements, soldier pile and lagging can be cantilevered, internally braced, or tied-back.

Auger cast tangent walls

Auger cast tangent retaining walls can be used in temporary or permanent applications. They are constructed by drilling a series of closely spaced main auger cast piles where reinforcing is placed in the fluid grout of these piles. These main reinforced piles are usually spaced so one or two non-reinforced piles can be drilled, slightly offset to the back of the reinforced piles, flush to each other, to fill in the space between.

The exposed face of auger cast tangent walls can be faced with shotcrete for create a smooth surface for permanent applications.

Auger cast tangent walls are very ridged systems that can withstand higher surcharge loads and can be installed in vibration sensitive areas. Depending upon design requirements, auger cast tangent walls can be cantilevered, internally braced, or tied-back.

Auger cast secant walls

Auger cast secant retaining walls can be used in temporary or permanent applications. They are constructed by drilling a series of in-line auger cast piles which overlap each other by several inches, forming a continuous, tightly sealed wall.

The exposed face of auger cast secant walls can be faced with shotcrete for create a smooth surface for permanent applications.

Auger cast secant walls are very ridged systems that can withstand higher surcharge loads and can be installed in vibration sensitive areas. Depending upon design requirements, auger cast secant walls can be cantilevered, internally braced, or tied-back.

The best part...we thrive on the difficult

Thanks to specialty equipment like the Movax SP-100 used for piling, and other low-headroom auger cast & drilling equipment, we have the ability to work in challenging, low-headroom conditions.