We use polyurethane grouting, helical piles, resistance piers and chemical grouting for commercial foundation repair and underpinning.
We are known for our polyurethane grouting expertise when it comes to stabilizing and correcting settlement of slab foundations. From small sections of settled warehouse floors and compressor bases to distribution centers, manufacturing facilities and big box retailers, we employ polyurethane grouting for commercial foundation repair with minimal disruption and downtime.
Polyurethane grouting may be used in place of traditional low mobility grouting for ground improvement, or high mobility grouting for undersealing. Learn more about CJGrout, our line of custom geotechnical polyurethanes developed specifically for heavy duty applications here.
Polyurethane compaction grouting can be performed up to 35′ below grade to consolidate weak soils below structures. Accompanied by DCP testing, polyurethane grouting can be targeted to treat specific problematic areas of soil below a structure, with post-grouting DCP testing for verification.
Chemical grouting for commercial foundation repair is primarily used for binding loose soils such as sands and gravels to improve bearing capacity. Permeation grouting uses prepolymer grouts to achieve compressive strengths approaching 150ksf in sands, and can also be used to cut off water flows adjacent to structure which may destabilize excavations. Chemical grouting is primarily performed in non-cohesive soils.
We install two types of mechanical underpinning products; helical piles and resistance piles. Helical piles are screwed into the ground, and bearing capacity is determined from the installation torque. Resistance piles are pushed into the ground, and are installed to movement of the structure being underpinning in order to verify capacity.
Helical piles are an excellent choice for mechanical underpinning and for new construction installations to prevent settlement. CJGeo provides turn-key installation of remedial and new construction helical piles, including pile design and analysis, stamped submittals & installation.
Resistance piles are pushed into the ground using the mass of the structure as resistance. They don’t work too well in lightly-loaded structures, or where footings have broken or deteriorated, as installation causes dynamic loading of the structure. Resistance piles are generally easier to install in tight spaces than helical piles. Commercial foundation repair using resistance piles typically done on cast-in-place structures which are sufficiently rigid to tolerate the dynamic loading associated with installing resistance piles.