Pressure Grouting Types and Solutions

Compaction Grouting

Compaction grouting is a technique in which soils are "compacted" by injecting a low-mobility, low-slump, cementitious grout into predetermined areas where soil is lacking the necessary density and/or strength. A particular gradation in the grout mix boosts the shear of grout particles, which keeps the mixture from following weaknesses in the soil. When done properly, compaction grouting will yield study, round columns that provide significant compaction to the surrounding soil, generating a strong underground foundation for further foundation repair services.

Slab Jacking, Settlement Mitigation/Stabilization

Slab jacking is a process by which grout is injected under settled or soon-to-settle concrete slabs. Several predetermined holes are cored and grout injected to elevate a given slab to the new desired level, usually back in line with that of the original construction.

Intrusion Grouting

Intrusion grouting is the process of pressure-injecting rocky or void-filled soils with a grouting solution similar in viscosity to pancake batter. This can be performed with either cementious or polyurethane grouts.

Chemical Grouting

Chemical grouting involves the pressurized permeation of sands and loose soils with specific chemical mixtures to yield sandstone-like masses for load bearing purposes. Water Control chemical grouting involves a similar process, using fluid (chemical or cementitious) grouts to fill voids and manage water flow.

Permeation Grouting

Permeation grouting penetrates tiny voids in a mass, replacing water or air between grain particles at low pressure to prevent fracturing. Once the grouting has solidified, the area has gained significant stability. Chemical grouts or tiny cement grout, alone or together, work well for this method.