Coastal communities, waterfront parks, marinas, resorts, and public recreation areas increasingly rely on boardwalks and elevated pedestrian structures to provide access to beaches, docks, wetlands, lakes, and other waterfront environments. These structures may appear relatively simple, but their foundations can be challenging to design and install.

Waterfront construction often involves soft soils, high groundwater, fluctuating water levels, erosion, tidal conditions, and limited equipment access. Traditional concrete foundations may require substantial excavation, temporary access roads, dewatering, and long construction periods.

For selected projects, helical pile foundations offer an alternative approach. By transferring structural loads through steel shafts and helical plates into suitable soil layers, helical piles can support waterfront structures while reducing the need for extensive excavation.

Better Screw Co. manufactures round shaft helical piles, square shaft helical piles, extensions, foundation brackets, pier caps, and related foundation products. Its application portfolio already includes docks and boathouses, boardwalks, footbridges, decks, lighting foundations, and civil construction.

Why Waterfront Foundations Are Challenging

Waterfront sites frequently differ from conventional building sites.

Contractors may encounter:

• Soft or compressible soils

• High groundwater levels

• Seasonal water-level changes

• Tidal fluctuations

• Erosion

• Difficult equipment access

• Environmentally sensitive areas

• Existing pedestrian infrastructure

A foundation solution therefore needs to account for both structural requirements and the surrounding environment.

Helical Piles for Boardwalk Foundations

Boardwalks often consist of repeated structural support points distributed along a long pedestrian route.

Helical piles can be considered for supporting:

• Coastal boardwalks

• Lakefront walkways

• Wetland walkways

• Elevated pedestrian paths

• Viewing platforms

• Fishing piers

• Access ramps

• Small bridges

The repetitive nature of these structures makes installation efficiency particularly important. Once the appropriate pile configuration has been established, installation crews can work systematically along the planned foundation line.

Reduced Excavation in Sensitive Areas

One of the most important advantages of helical pile installation is the relatively small installation footprint.

Traditional foundations may require excavation around each support location, followed by removal of soil and restoration of the surrounding ground.

Helical piles are rotated into the soil rather than installed through a large excavated pit.

For waterfront projects, this can help reduce disturbance to:

• Existing vegetation

• Wetland areas

• Shoreline landscaping

• Pedestrian paths

• Drainage systems

• Adjacent structures

Actual environmental requirements should always be evaluated according to the specific project and local regulations.

Supporting Waterfront Access Structures

Boardwalks are only one potential application.

Helical piles can also be considered for foundations supporting:

Docks and Boathouses

Waterfront structures need foundations capable of handling vertical and lateral loads while remaining stable in changing ground and water conditions.

Viewing Platforms

Piers and observation platforms often extend over water or sensitive terrain. A deep foundation system can transfer loads below weak surface soils.

Pedestrian Bridges

Small footbridges connecting waterfront trails may require foundation support at locations where conventional excavation is difficult.

Access Ramps

Accessible waterfront facilities often require long ramps and elevated approaches. Helical piles can provide foundation support at repeated locations along the structure.

Installation Without Concrete Cure Time

Another potential benefit is the absence of a conventional concrete curing period.

After a properly engineered helical pile is installed and verified, the foundation connection can proceed without waiting for concrete to reach its design strength.

This can be valuable for projects where:

• Construction windows are short

• Weather is unpredictable

• Access is seasonal

• Public facilities need to reopen quickly

For waterfront tourism facilities, minimizing construction time can also reduce disruption to visitors and businesses.

Coastal Corrosion Considerations

Coastal environments can be particularly aggressive toward steel because of moisture and salt exposure.

Before selecting a helical pile system, engineers should evaluate:

• Soil chemistry

• Groundwater conditions

• Chloride exposure

• Design service life

• Required corrosion protection

• Steel thickness

• Connection details

Galvanization or other appropriate corrosion-protection measures may be specified depending on the project environment.

Installation and Structural Verification

A helical pile is not selected simply according to the size of the structure.

The engineering process should consider:

• Structural load

• Soil profile

• Required embedment depth

• Helix diameter

• Shaft configuration

• Installation torque

• Compression capacity

• Tension capacity

• Lateral loading

• Connection requirements

Installation torque can be used as part of field verification when appropriate engineering procedures are followed.

Useful for Waterfront Renovation Projects

Helical piles are also worth considering when an existing boardwalk or dock needs to be expanded or repaired.

Renovation projects can be more difficult than new construction because contractors must work around existing:

• Decking

• Piles

• Utilities

• Railings

• Pedestrian routes

• Landscaping

A relatively compact installation process can make foundation upgrades easier to coordinate.

Conclusion

Coastal boardwalks and waterfront access structures require foundation systems that can work in difficult soils while limiting unnecessary site disturbance.

For suitable applications, helical piles provide a combination of efficient installation, reduced excavation, flexible structural configuration, and compatibility with docks, boardwalks, pedestrian bridges, viewing platforms, and access structures.

Better Screw Co. supplies OEM round shaft and square shaft helical piles, extensions, brackets, pier caps, and related foundation components for international construction and infrastructure markets. Its existing application portfolio demonstrates the suitability of helical pile technology for boardwalk, dock, civil construction, and other challenging foundation projects.