Water Pressure Injection Services

Water pressure injection of subgrade soils has recently become the method of choice among many architects and engineers dealing with expansive clay soils commonly found in the Dallas–Fort Worth area. It is the least expensive, most positive and easiest way to limit the potential for post-construction floor movement.

Moisture increases in clays, typically resulting from capillary rise or seasonal moisture, can expand the soil several times its original size and exert pressures in excess of design strength of a slab-on-grade foundation. An equally destructive force occurs during dry seasons when the clays around the perimeter of a building dry and shrink away from the foundation. Clays can move not only vertically, but also laterally, which is especially destructive since it puts the foundation in tension where the concrete has very little strength.

The purpose of water injection is to increase the soil moisture content, and thus pre-swell the expansive clays prior to construction of the floor slabs in order to reduce the amount of post-construction soil expansion. In most cases, a depth of 7- to 10-feet is sufficient to be below the critical moisture change zone. The actual number of injection passes required will be dependent upon the soil moisture conditions at the time of construction.

The performance of an injected subgrade is dependent upon the quality of the workmanship. We at Jowell Corporation pride ourselves on quality workmanship.

PLEASE EMAIL JOWELL CORPORATION OR CALL FOR MORE INFORMATION ON OUR WATER PRESSURE INJECTION SERVICES

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