Soil Stabilization


What is Unstable Soil?

Unstable soil can be defined as soil that doesn't stay in place on its own, and therefore requires extra support. Note that unstable soil can threaten the stability, security, and safety of infrastructure, and can even damage, degrade, and destroy structures, such as buildings, bridges, and roads.

As such, soil stabilization may sometimes be necessary to effectively lift driveways, walkways, or slabs.


This is an extreme example of what it may look like when soil stabilization is needed. If your seawall looks like this, it is in dire need of stabilizing. The soil and grass has complately eroded away and you will notice an even greater long term affect to the surrounding area.

What Causes Unstable Soil?


Poor drainage, leaking drain pipes, and broken water lines are common culprits.

Poor Compaction

When backfilling on a jobsite, contractors are supposed to compact the backfill by driving over it with heavy equipment.

However, this isn't always done properly.

Freeze/ Thaw

Cold weather freezes moisture trapped in tiny cracks. When the water freezes, it expands, pushing on the rocks and breaking them into smaller pieces. As this process continues, rock and sediment are continually broken down.

Biological Decay

Construction trash pits, buried trees, and other biodegradable materials all break down. Sometimes structures are built over these areas.

The Solution

The Pump & Spray Company utilizes a polymer foam that is able to:

1. Reinforce eroded areas

Displacing water and curing into a solid mass to reverse the erosion process

2. Permeate soil

3. Fill voids caused by decay

Polymer foam fills voids before it cures, making it a great solution for instances of biological decay.

The Result

A structural foam that is stronger than crystalline bedrock, providing a reliable foundation for buildings, infrastructure, and any additional concrete lifting needs.

Commercial & Residential


This is one of our latest soil stabilization jobs that took place at a country club in Bonita Springs, Florida. Our crews stabilized the whole side of the lake within the community. The residents were afraid that if the lake flooded, the embankment might fail. If an embankment this large were to give, it could result in flooding of parts of their community.  We injected over 1100 spots in the embankment to stabilize the retaining wall. This is service that we do to stabilize soil around foundations and along seawalls

Here is a short video of the complete process. This shows our crew member inserting the pole into the ground, attaching the hose, and begins to pump the product below the surface. This results in the product permeating with the soil and moisture in the ground to produce solid pillars that supports the ground from future movement. In this case the columns were added to combat the hydrostatic pressure that is created when the water level rises in the lake.

Hill Stabilization
Hill Stabilization
Stabilize Soil Permeation vs. Compaction Grout
Stabilize Soil Permeation vs. Compaction Grout