Ground improvement techniques like Geopier® Rammed Aggregate Pier® elements, rigid inclusions, and deep compaction methods help strengthen subgrades and control settlement. In this Helical News Brief, we’re answering your most frequently asked questions about ground improvement. Enjoy! And please reach out directly with more questions!
What is ground improvement and when is it needed?
Ground improvement can enhance soil strength and stability to support loads, reduce settlement, and increase bearing capacity. In the Northeast, it’s commonly used when fill, organic, or clay soils cannot support foundations without treatment.
What is the difference between ground improvement and deep foundations/piles?
Ground improvement works with existing unsuitable soils and added structural fill to create a modified subgrade for conventional footings and slabs-on-grade. In contrast, deep foundations bypass unsuitable soils, transferring loads to deeper bearing layers and are directly connected to a rigid foundation system with pile caps, grade beams, and structural slabs.
How much does ground improvement cost?
Ground improvement costs can vary widely – from less than $4/SF to greater than $30/SF depending on several factors such as soil conditions, load demand, proposed grading, job size, and site access. If you would like help evaluating ground improvement costs for your project, please click here.
What methods of ground improvement does Helical Drilling provide?
Helical Drilling offers a variety of proven ground improvement techniques, including:
- Geopier® Rammed Aggregate Pier® (RAP) Systems
- Geopier® GeoConcrete Column® (GCC) Rigid Inclusions
- Displacement Rigid Inclusions
- Drilled Rigid Inclusions
- Rapid Impact Compaction (RIC)
- Vibratory Probe Compaction (VPC)
- Compaction Grouting
- Jet Grouting
For more details on these techniques, please click here.
