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Cement grout is injected into the soils to fill void and soft zones in order to stabilize footings and foundations. Cement grout is injected into the soils as grout injection pipes are slowly withdrawn. Thickening the grout and/or increasing the grout pressure can compact the soils together and force the settled foundation or floor upwards to the original or usable condition.

Pressure Grouting

Settled floors in warehouses and office areas can be efficiently and economically repaired utilizing pressure grouting. Grout injection pipes are driven into the soils and cement grout is injected under pressure to fill voids and soft zones in the soil. Additional pressure can be utilized to lift slabs and floors to original or usable elevations. Grout mixing and pumping equipment is typically located outside the building in a convenient area.

Floor Stabilization

10" diameter auger cast-in-place piles drilled and installed on 12" centers x 24' depth as shoring for new press foundation pit (12'x16'x12')

New Press Pit Foundation

Auger Cast Piles - Economical and efficient alternative to precast concrete driven piles for new tank foundations in Hopelell, VA. Original plans for new tank foundations called for a precast driven pile system. Technical Foundations offered augercast piles as a value engineered alternative to the precast driven piles. Augered cast in place piles require little or no pile butt waste typically associated with driven pile systems. Additionally, augercast production piles can be installed immediately following the results of the pile load test, resulting in a more efficient construction schedule. The test pile was loaded to failure and was assigned a pile capacity of 24 tons with FS of 2-3 even given the uncontrolled fill soils.

Auger Cast Piles

Compaction Grouting - Active karst soil area is stabilized with compaction grouting for new building foundation in Harrisonburg, Virginia. Project design included ground resistivity (RES) site assessment survey to help reveal potential void and soft zone areas. Job specifications required auger borings to be performed at specific footing areas identified by the RES study. If voids and zones of soft soil seams were encountered, additional borings were drilled in the area and compaction grouting was conducted in the footing areas to an average depth of 28.5 feet below footing elevation. Approximately 240 cubic yards of compaction grout was injected in 42 different injection holes across the building site. The drilling and grouting program was conducted during the winter months allowing the foundation work to begin without delay.

Compaction Grouting


Slab Stabilization

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Technical Foundations, Incorporated
P.O. Box 50282 w Richmond, VA  23250 w (804) 328-4500 w fax: (804) 328-4510
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Last modified: June 19, 2007