What Is Soil Stabilization?
Since the dawn of civilization, heaving soils due to seasonal moisture have plagued builders; cracking foundations, buildings and roadways. 3,000 years ago, Romans mixed lime with sub-grade foundation soils to stabilize expansive clays, but because the lime was only surface deep, the effects were short lived. Today, with our experienced staff, Land Stabilizers can stabilize high plasticity soils quickly and inexpensively with lime, lime-slurry, high pressure water injection, high pressure chemical injection, and chemical injection with CONDOR® SS Soil Stabilizer. We are pioneers in the development of pressure injection stabilization, which simultaneously pre-swells and reduces the effective plasticity of the clay, effectively controlling moisture migration and increasing bearing strength. High pressure injection achieves the desired result for both commercial and residential customers, both pre-construction or as a remedial treatment. Please consult a professional engineer to determine which form of soil stabilization is the best solution for your specific soil problem. When the plasticity index (PI) exceeds 25 percent, intolerable heave can be expected. If this is the case with your soil, you can count on Land Stabilizers to improve your soil quickly and economically.
High Pressure Injection
Land Stabilizers performs all kinds of soil stabilization, yet it is in pressure injection where we have built our reputation over the past three decades. We use hydraulic systems to force perforated steel rods into the soil and high-pressure duplex mud pumps to inject the soil stabilizer, which contains the surfactant specified by engineers. In very stiff solids, holes are pre-drilled and inflatable packers plug the holes, forcing the stabilizer through the soil. Stabilizers are injected at a regulated pump pressure of 50-200 psi. This allows the greatest volume of stabilizer to penetrate the ground. The material initially flows through open joints and fissures, but as pressure increases, smaller fractures give way to allow stabilizers to penetrate. As clays begin to swell, the surfactant decreases the surface tension of the water and the permeability of the soil appears to increase. Through the physiochemical phenomenon of cation exchange, the stabilizer reduces the plasticity of contacted surrounding clays by about 25%. Through increasing the moisture content, the process effectively reduces the plasticity indexes by 65 to 95%, depending on the process used. Once injection is complete, all joints and fissures in the soil are filled with the specified material – usually lime – and appear as a network of horizontal seams interconnected by vertical or angular veins. Further vertical and lateral water flow has been prevented and the flow of water vapor has been greatly reduced. Injections normally reach pre-determined depths of 3’-10’ however depths of 40 feet can be attained. Typical grid arrangements are 5’x5’, but can be adjusted to meet engineer specifications. Some jobs require double, triple and quadruple injection passes, drilling orthogonal holes. This increases the volume of stabilizer injected and decreases the distance between holes, resulting in an even greater reduction in swell and heave… up to 95% or more!
Soil Stabilization is an IN SITU (in place) process. You do not have to cut and fill if you stabilize in situ, so you save both time and money. Should additional earth be needed to raise the elevation on your jobsite, you can utilize soil from you site or from the closest borrow area. All forms of soil stabilization reduce swell in expansive clay soils. Standard High Pressure Injection reduces swell by 50-65% and effective plasticity indexes by increased moisture and pre-swell treatment by 50-65%. Multiple injections can reduce heave by up to 95% or more on highly plastic soils. High Pressure Injection Stabilization is especially beneficial for slabs on grade or fill material because it reduces heave and movement and eliminates the need for additional reinforcement. BEST OF ALL, YOU SAVE MONEY! Native soil can be stabilized at the site or less expensive, plastic materials can be brought in, spread and stabilized in place. Many of our clients have saved more than 75% of their site work costs.
What Chemical Processes Are Offered?
For most applications, one of our treatments including Lime Slurry Pressure Injection, CONDOR® SS Soil Stabilizer Injection, Water Injection with Surfactant, or Lime Spread and Mix will satisfy your specifications. However your engineer may recommend that Land Stabilizers utilize different materials like fly ash, bentonite, cement grout or surfactant. We are experts in all processes and types of soil stabilization. Consult an engineer to determine the best way for you to stabilize your soil.
What Remedial Services Are Offered?
Land Stabilizers can professionally stabilize any soil, before or after it has been developed using our exclusive CONDOR® SS Soil Stabilizer. This is especially useful for remedial work on your home, to help preserve the foundation, swimming pool, paving areas, or other buildings. The addition of CONDOR® SS Soil Stabilizer to the soil minimizes the tendency of solids to expand through the presence of excess moisture. CONDOR® SS Soil Stabilizer alters the chemical properties of the soil by use of an Ion Exchange Resin (IER). CONDOR® SS Soil Stabilizer is different from other chemical stabilizers in that it utilizes water-soluble sulfonated oils, which are more effective in clay soils. By controlling moisture migration, remedial soil stabilization stops heave. The most attractive feature of remedial stabilization on houses as well as commercial buildings is that it is hassle free! The job can normally be completed in one day, at a FRACTION OF THE COST OF CONVENTIONAL FOUNDATION REPAIR WORK