Retaining Walls & Earth Stabilization

Fast, Durable and Green Earth Retention with Neoloy® Tough-Cells 

Main Retaining Wall & Earth Stabilization Challenges

Retaining walls and earth stabilization systems must control soil movement from lateral earth pressure, surcharge loads, weak foundations, poor drainage, seismic forces, and long-term exposure.

The challenge goes beyond the visible wall face. A successful design also accounts for slope geometry, foundation capacity, groundwater, deformation control, material durability, and site access. Miss any of these, and the project risks settlement, wall movement, drainage failure, or a shorter service life.

Common engineering and construction challenges:
  • Unstable slopes from cut-and-fill work
  • High lateral pressure and surcharge loads
  • Weak or compressible foundation soils
  • Hydrostatic pressure behind poorly drained walls
  • Seismic loading and ground movement
  • Long-term deformation under sustained load
  • High costs for concrete, gabions, foundations, and equipment
  • Limited site access and complex logistics
  • Site restrictions where hard-wall systems don’t fit

Conventional concrete, gabion, and segmental block walls retain soil effectively, but they often demand deep excavation, imported materials, heavy equipment, and long build schedules.

A durable earth retention system should do more: maintain confinement, control deformation, support drainage, adapt to site conditions, and hold structural integrity for its full design life.

How Neoloy® Tough-Cells Reinforce Earth Retention Structures

Neoloy® Tough-Cells mechanically stabilize retaining wall structures through confined horizontal layers. Each layer is filled and compacted to create a stable reinforced block. The cellular structure confines the infill, resists lateral movement and helps the wall behave as a unified mass. 

The system improves earth retention performance through:

Key engineering benefits
  • 3D confinement limits lateral infill movement
  • High tensile strength resists sustained earth pressure
  • Low creep preserves wall geometry over time
  • Flexible response accommodates minor settlement and seismic movement
  • Integrated drainage helps reduce hydrostatic pressure
  • Vegetated fascia supports visual and environmental integration
  • Local or recycled infill can reduce material demand where approved

Long-term earth retention performance depends on tensile strength, creep resistance and dimensional stability, especially because retaining structures are exposed to sustained loads over time. 

Key Performance Benefits

Neoloy® earth retention translates material performance into structural value. 

>16 kN/m

Long-Term Wall Stability

High tensile strength keeps the wall confined under sustained earth pressure.

High tensile strength
<2% Creep

Low Deformation

Low creep keeps cell geometry stable, so the wall keeps its shape for years.

Permanent deformation
>450 MPa at 60°C

Structural Stiffness

NPA holds its stiffness under sustained load, even at elevated temperatures.

DMA design value

Design-Life Performance

Material properties are proven to meet the wall's full service-life requirement.

Per project specification
0.3–0.4× Acceleration

Seismic Resilience

The flexible wall mass absorbs seismic energy and tolerates minor ground movement.

Reported attenuation

Fast Construction

Panels unfold on site and stack directly into a stable structure.

Less formwork and lifting
25% Savings

Cost Optimization

Validated local or waste materials can fill the cells, cutting import costs.

Cost savings

up to 90% Sustainability

Green fascia and local infill cut imported materials, hauling, and overall footprint.

Lower carbon footprint
Engineering note: Final performance depends on wall type, wall height, retained soil properties, foundation conditions, surcharge loads, seismic design criteria, drainage, infill material, compaction, reinforcement requirements and project-specific construction QA/QC. 

Retaining Wall & Earth Stabilization Applications

Embankments & Transportation Corridors

Road and rail embankments require stable earth structures that resist erosion, settlement and slope movement. Neoloy® Tough-Cells can support green embankment walls, grade transitions, bridge approaches, transportation corridors and safety barriers. 

Typical value: 
  • Green road and rail embankments 
  • Reduced visual impact near public infrastructure 
  • Efficient drainage and erosion protection 
  • Long-term earth stabilization for variable grades 

Gravity retaining walls use the self-weight of stacked Neoloy® Tough-Cell layers and compacted infill to resist lateral earth pressure. This configuration is suitable for lower to moderate wall heights, landscape walls, infrastructure slopes, embankments and green retaining structures. 

Typical value: 
  • Fast construction using compact folded sections 
  • Local granular infill where suitable 
  • Vegetated fascia for green wall appearance 
  • Reduced foundation excavation compared with rigid wall systems 
  • Flexible response to minor settlement or ground movement 

Integrated earth stabilization combines a Neoloy® retaining wall at the base with Neoloy® slope protection on the upper slope. This is especially relevant for unstable, steep or high slopes created by road construction, cut-and-fill earthworks or failed slopes. 

Typical value: 
  • Combines earth retention and erosion control in one system 
  • Stabilizes unstable lower slope areas 
  • Protects upper slopes from erosion and surface degradation 
  • Enables green slope and wall restoration 
  • Reduces the need for separate heavy wall and slope systems 

For energy, industrial and storage infrastructure, Neoloy® Tough-Cells can be used to build protective berms and retaining walls around tanks, facilities and sensitive assets. 

Typical value: 
  • High static load support 
  • Corrosion-resistant material 
  • Seismic-resilient wall structure 
  • Green or hard-armored fascia options 
  • Cost-effective alternative to oversized concrete or gabion walls 

Where flat construction space is limited, retaining walls are often required to create level platforms for industrial sites, yards, buildings, tanks or infrastructure facilities. Neoloy® Tough-Cells can form earth retention structures that extend usable space and stabilize the platform edge. 

Typical value: 
  • Creates usable level land on sloped or constrained sites 
  • Reduces need for large concrete retaining structures 
  • Enables use of local or waste infill materials where suitable 
  • Supports faster construction schedules 

Use of Neoloy® on Retaining Wall

Gravity Wall

Typical use

Lower- to moderate-height retaining walls, green walls, landscape walls, and platform edges.

Engineering purpose

Uses wall mass and confined infill to resist lateral earth pressure.

Reinforced / MSE Wall

Typical use

Taller retaining walls, steep slopes, and infrastructure embankments.

Engineering purpose

Combines Neoloy® layers with horizontal reinforcement for greater structural stability.

Integrated Wall + Slope Protection

Typical use

Unstable slopes requiring earth retention at the base and erosion control above.

Engineering purpose

Integrates structural earth retention with reinforced upper-slope protection.

Protective Berm / Industrial Wall

Typical use

Storage tanks, energy facilities, industrial platforms, and protected operating areas.

Engineering purpose

Provides earth retention, impact protection, durability, and green-integration options.

Project Validation: LNG Storage Terminal Platform, Caribbean Islands

A Caribbean refinery expansion required a level platform for new LNG storage terminals, increasing capacity by 400,000 barrels, or 33%. Conventional concrete and gabion walls were constrained by seismic design requirements, high costs, and difficult material logistics.

PRS delivered a free-standing Neoloy® Tough-Cells gravity wall using quarry waste as backfill and native vegetation for the fascia. The 300 m-long wall, reaching 6.5 m in height, was completed within three months.

Project highlights
  • 25% cost savings
  • Seismic-resistant gravity wall system
  • Quarry waste reused as structural backfill
  • Durable performance in a marine environment
  • Green fascia for landscape integration
  • Reduced dependence on imported construction materials

View the LNG Storage Terminal Retaining Wall Project →

Build Stronger Earth Retention Structures with PRS

PRS supports retaining wall and earth stabilization projects with engineering evaluation, wall configuration, material selection, installation guidance and project-specific value engineering.