Innovative Foundation Solutions™
Rigid Inclusions

Rigid Inclusions transfer loads to stable layers for greater strength, lower cost, reduced load transfer requirements and shorter construction time.

Geosolv Rigid Inclusions

Why Use Rigid Inclusions?

When Rammed Aggregate Pier elements cannot adequately control settlement in soft or loose soils, and there is a stiffer soil layer below the soft/loose soils, the use of Rigid Inclusions can typically solve the problem.

Rigid inclusions are frequently used for soil stabilization when a load is being transferred through very soft soils to stiffer soil or rock, increasing load carrying capacity and reducing compressibility of the poor soils. Rigid inclusions are often used to support an embankment or building over compressible soils, ultimately supported by a hard layer.

Geopier's Rigid Inclusions are available as five different systems each tailored to deliver outstanding results in different soil conditions.

1. Grouted Rammed Aggregate Pier® System

Grouted Rammed Aggregate Pier installation

Precision Grouted Rammed Aggregate Pier elements are built similarly to Geopier Impact and Grouted Rammed Aggregate Pier elements with a grout mixture added to provide high capacity Geopier elements in highly organic or very soft/loose soils. In contrast to the grouted RAP elements, the grout is added only where needed, such as through a very soft clay or peat zone. This system allows for standard spread footing and slab-on-grade design and provides for better capacity in poorer soils. 

Treat up to 16m depths with 400-750mm diameter elements for high loads in loose sand, soft silt and clay, fill, topsoils, and organics, with a combination of a grouted RAP element targeted to the very poor zone and a regular Rammed Aggregate Pier element elsewhere.

2. Geopier GeoConcrete® Columns (GCC)

Geopier Geoconcreate

GeoConcrete (GCC) is used for very high loads in very poor soils.  GeoConcrete Columns are a rigid-inclusion approach that uses controlled, ready-mix concrete to build fast expanded base rigid inclusions with very high capacities.

Treatment Depth: 16 m

Diameter: 450 - 600 mm (expanded base)

Soil Types: Very Soft Clay / Silts, Very Loose Sands, High Organic Peat and Organics

3. Precision Grouted RAPS

Precision Grouted Rammed Aggregate Pier elementPrecision grouted Rammed Aggregate Pier® (RAPs) Systems are used to target poor soil zones anywhere in the soil profile in order to increase pier capacities beyond what a regular RAP can achieve.  A specially equipped Geopier Impact mandrel is used in the installation and placed on the survey pin location with the stone valve in closed position.  Pressurized grout is applied at the mandrel tip when the mandrel tip is at the correct elevation where poorer soils are encountered at any level in the soil profile.  In all other aspects, precision grouted RAPs are the same as grouted RAPs.

Specifications: Geopier Grouted Impact elements use a grout mixture to provide high capacity Rammed Aggregate Pier elements to control settlement in highly organic or very soft/loose soils.

Treatment Depth: 16 m

Diameter: 400 - 700 mm

Soil Types: Soft Clay / Silts, Very Loose Sands, Peat and Organics

4. Armorpact® System

GeoSolv Armorpact

The Geopier Armorpact system is a cost-effective solution for supporting structures in soft clay or organic soils.  The system utilizes a high-density polyethylene confining shell and vertical impact ramming to construct high-capacity Rammed Aggregate Pier elements for superior settlement control.  

Improve up to 10m depths with 200-600mm diameter confined elements in very soft clays/silts, deep peat, poor fills and organics. The Armorpact system can be installed in high groundwater conditions.

5. Geospike® System

Geopier GeoSpike® SystemThe Geopier GeoSpike(sm) system is a patented, low-cost method for treating weak railroad track subgrades.

This design-build system creates strong elements in weak subgrade soils and can be installed without removing railroad tracks or ties. Subgrade improvement takes place by driving pre-manufactured GeoSpike shells in pairs between rail ties at regular intervals.

The GeoSpike shell is driven in-place by inserting a driving mandrel within the shell and advancing the mandrel to design depths. The expanded top of the shell compresses between ties during insertion and expands back to its original shape after clearing the rail ties to allow for efficient load transfer from the rail ties to the GeoSpike system.

After driving to design depths, aggregate is placed within the confining shell and compacted by repeated insertion by the driving mandrel. The dynamic loads from the passing rail cars arch through the ballast to the GeoSpike, and are effectively transferred through the shell and densely compacted aggregate down to a suitable bearing layer.

Rigid Inclusion Delivery by GeoSolv

We are here to find the right solution to your soil problem – contact us today for a free review of your project details and an obligation-free proposal or feasibility study.