The unseen risk beneath our feet

 

Poorly compacted soil is ground that has not been properly densified during construction or has weakened over time.

When soil is not strong enough to bear the weight of a structure, it can settle unevenly, causing everything from cracks and voids to serious structural failure.

The weight of large public assets, combined with heavy, repetitive traffic, can quickly exacerbate this problem.

Infra poorly comp body

Impact of poor consolidation of soil on infrastructure

Roads

Poorly compacted soil beneath roads can cause uneven surfaces, cracks, and potholes, leading to premature wear and tear and a poor ride for drivers. It also leads to voiding beneath concrete slabs, which can result in dangerous "track faults" where the ground has subsided.

Rail

On rail networks, track beds that are not properly supported can develop voids and require constant maintenance. This creates track faults and speed restrictions that can cause long-term delays.

Airports

Runways and taxiways demand impeccable ground conditions to support enormous weight and high-frequency traffic. Uneven settlement caused by poorly compacted soil can create hazards for aircraft.

Other Infrastructure

Utilities, tunnels, bridges, and critical assets are all vulnerable. Leaking pipes can wash away supporting soil, creating voids and leading to sinkholes.

Poorly compacted soil: the unseen risk beneath our feet

Poorly compacted soil is ground that has not been properly densified during construction or has weakened over time. When soil is not strong enough to bear the weight of a structure, it can settle unevenly, causing everything from cracks and voids to serious structural failure. The weight of large public assets, combined with heavy, repetitive traffic, can quickly exacerbate this problem.

Impact of poor consolidation of soil on infrastructure

Roads: Poorly compacted soil beneath roads can cause uneven surfaces, cracks, and potholes, leading to premature wear and tear and a poor ride for drivers. It also leads to voiding beneath concrete slabs, which can result in dangerous "track faults" where the ground has subsided.

Rail: On rail networks, track beds that are not properly supported can develop voids and require constant maintenance. This creates track faults and speed restrictions that can cause long-term delays.

Airports: Runways and taxiways demand impeccable ground conditions to support enormous weight and high-frequency traffic. Uneven settlement caused by poorly compacted soil can create hazards for aircraft.

Other Infrastructure: Utilities, tunnels, bridges, and critical assets are all vulnerable. Leaking pipes can wash away supporting soil, creating voids and leading to sinkholes.

Infra poorly comp body

 

Business and Community Impact

For infrastructure managers, the consequences of poorly compacted soil are significant. Unexpected failures can lead to service disruptions, temporary closures, and extensive, unbudgeted repair work. Beyond the direct financial costs, these issues have a profound impact on the public. A single road closure can divert traffic for weeks, causing significant delays and affecting local businesses. A rail track fault can cause widespread travel disruption. 

At Geobear, we act as a responsible contracting partner, helping solve these problems without the need for disruptive, time-consuming excavation. Our solutions are up to 70% faster than traditional methods, helping you maintain operations and get infrastructure back in service quickly and safely.

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How does Geobear approach the issue?

Geobear's ground improvement solutions are an ideal alternative to traditional excavation and replacement. Instead of digging out and replacing the weak soil, we use geopolymer injection to strengthen the ground from below. This non-disruptive method and has a number of benefits including:

1

Increases soil bearing capacity

Our expanding geopolymer fills voids and densifies the surrounding soil. This increases the load-bearing capacity of the ground, helping support the public asset above. For situations with significant gaps, consider our void filling treatment.

Geopolymer injection holes on a motorway
2

Is up to 70% faster

Our solutions can be completed in hours or days, not weeks or months. This dramatically reduces downtime, helping you protect your operational integrity.

Geobear techs working injection points at night on a motorway with injection system hose in foreground
3

Has a 75% lower carbon impact

Our approach is significantly more sustainable than digging and replacing soil, helping you meet your environmental commitments.

CO2 assesssed
4

Offers a wide portfolio of expertise

We have a proven track record as a contracting partner, with our teams and engineering expertise available to support you on projects of any scale. For issues requiring significant load transfer, we also offer a structural support treatment.

Geobear employees standing for a group photo on a sunny day

How It Works

The Geobear process is precise, rapid, and scientifically validated.

1

Injection

Steel tubes (typically 12–16 mm in diameter) are inserted to the required depth within the weak soil.

2

Expansion

The geopolymer is injected in liquid form. Controlled expansion compacts surrounding soil and forms reinforced zones.

3

Improvement

Within minutes, the material hardens, creating a dense, water-resistant matrix that permanently improves soil stiffness and strength.

The improvement is immediate and can be verified through on-site testing (Dynamic Cone Penetration or Plate Load Tests). Typical post-treatment data show a two- to threefold increase in stiffness modulus (E-value) and up to 70% reduction in settlement or deflection.

Design and verification

Geobear’s design work is carried out in accordance with Eurocode 7 (EN 1997-1) and supported by peer-reviewed scientific literature and laboratory research. Numerical modelling, including finite-element analysis (FEM), is used to define optimal injection spacing, pressure, and depth to achieve targeted soil performance.

Parameter

Typical Improvement

Verification Method

Soil stiffness (E)

2–3× increase (e.g. 40 → 100 MPa)

DCP / PLT testing

Settlement reduction

60–70 %

FEM simulation & field monitoring

Compressive strength (material)

1–5 MPa

Laboratory testing

Permeability

Gas- and water-impermeable

Independent lab report (ISO 15105-2)

Design life

≥120 years

Accelerated ageing & field performance data

Contact us to learn how we can help

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