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- Ground Improvement
- Drilled Shafts
- Earth Retention
- Driven Pile
- Augercast Pile
- Micropile
- Other Services
View the technology and process behind the dry top feed method of our Vibro Stone Columns.
Vibro Replacement and Vibro-Displacement Stone Columns Extend Range of Your Soil Improvement Options
Benefits of Vibro-Displacement
- Minimal to no spoils generated
- Faster installation than Vibro Replacement
- Lateral soil displacement leads to quicker pore water dissipation
- Greater load bearing capacity – reduced footing size
- Increased stiffness modulus of stone lifts
Get an analysis today from expert engineers
You may use several different vibratory techniques used to improve loose or softs soils, depending type of soil to improve. Vibro Replacement Stone Columns are a type of aggregate piers installed in fine-grained and/or cohesive soils in order to increase the bearing pressure and mitigate settlement for building purposes.
The Vibro Replacement installation technique uses a high frequency, down-hole vibratory probe to compact lifts of granular material within the column. The technique is called Vibro Replacement due to the fact that the soft, non-compactible soils are replaced by the installation of load bearing columns with well-compacted, coarse-grained backfill material.
In cohesive soils, the advancement of the vibratory probe is made difficult by the soil stiffness. In particular, when the probe is suspended from a crane, it will not advance through even soft, cohesive soil, and pre-augering is necessary. The pre-augering process removes the soft soil, and lifts of coarse granular material can then be introduced to the hole. The lifts are then compacted with the probe.
Vibro-displacement for maximum cost-effectiveness
Vibro-displacement is another installation technique using vibratory probes to compact stone columns in cohesive soils; however, with this technique, special rigs are used to advance the probe hydraulically, thus displacing the soil without removing it.
Stone columns / aggregate piers can be installed with or without pre-drilling, depending on the type of soil to be improved and the available equipment. When possible, vibro-displacement is typically the most cost-effective since it requires little to no spoil removal (and disposal) from the site.
Vibro replacement and Vibro-displacement Specs
Vibro Replacement and vibro-displacement stone columns can be used to achieve bearing pressures typically in the range of 4,000psf to 6,000psf, and are most often installed to support building structures, MSE walls, and storage tanks. Typically, stone columns range in diameter from 24 to 36 inches and are installed to depths of 10 to 30 feet below the surface. If necessary, greater depths can be achieved in most cases.
Solid Engineering and Quality Control Guarantees Success
Experience is critical in the reliable installation of these Vibro Stone Columns. These techniques not only require sound engineering practices, but also expert quality control and acceptance.
When Subsurface Constructors rigs are used to install Vibro Replacement or vibro-displacement stone columns, an on board computer monitors and records all aspects of the stone column construction. This includes depth of column, lift thickness and compactive effort. Some Subsurface Constructors example projects include:
Get Complete Analysis of Your Vibro Replacement / Displacement Project Today
Contact Subsurface Constructors today for a prompt and thorough analysis with experienced Vibro Stone Column engineers, and get your project on the fast-track to completion.
Subsurface provides design and construction for all methods of vibro stone column installation. As a result of our fleet of unique vibro rigs, vibro-displacement is our most common and cost-effective method. This can eliminate the costs of handling the spoil at some sites, and lead to a more sustainable and LEED-friendy site.
Read about this Ground Improvement Project... |
Learn about this Ground Improvement project... |
Learn about this Vibro Stone Column Project... |
