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In most residential applications, the difference between poly-foam leveling and pressure grouting is minimal except for cost. There are a few situations were poly-leveling is the only solution; two such cases are that of sea wall repair and dam stabilization. Both of these situations take place near water which means that a hydrophobic material is needed to be effective. There are more than 800 types of polyurethane foam, which allow us to find the perfect foam for any application.
Recently we were asked by a contractor trying to fix a 100-year-old leaking dam if we could pump bentonite clay into the dam to stop the lake from leaking. Now everything that could be wrong with this dam was wrong. There should never be trees on a dam since trees have roots, trees die, and roots decay, which causes dams to leak. In this situation, which is not unusual to find with older dams, there were trees both alive and dead, which had allowed for chipmunks to make lots of little tunnels all over jeopardizing dam integrity. Occasionally, larger burrowing critters like groundhogs do even more damage.
We opted for pumping two different kinds of foam, through more than 100 pipes that we pushed 5-10 feet into the ground at strategic points around the leaking area of the dam. By doing this, we were able to make the dam denser and stop the water leaks. This particular dam took over ten cubic yards of foam to stiffen it up, fill voids and make the ground generally more dense without changing its size.
Another perfect application for polyurethane foam is repairing sea walls. Lake Erie is one of the more shallow of the Great Lakes, which also can make it the most dangerous and ferocious. The constant slamming of the waves against the concrete sea walls that line most lake properties as well as the water erosion done to the soil that meets the concrete wall can lead to undermining of the concrete.
The bulkhead or some form of retaining wall separates the water from the base, which usually supports a sidewalk. At initial construction, a large stone like a #1 (the size of your fist) supports the sidewalk. Over time the stone settles, creating a void beneath the walk. Since the bulkhead is rarely watertight, water migrates back and forth. With the high water in recent years in the Great Lakes, water can reach further inland beyond the sidewalk. This soil or fine fill quickly erodes into the more substantial stone which is full of voids. That is why the ground seems to “disappear.” When the correct foam is placed at the exact location, this migration can be halted, offering more permanent support for the sidewalk giving it a longer life.
Sea Walls are expensive to put in, but by using polyurethane foam to repair any undermining that has happened can allow the initial investment to last a lifetime. If a sea wall is allowed to be undermined, it can collapse, which is a costly excavation and rebuilding repair. With over 800 different types of foams available, there are particular ones to be used in wet environments. Contact us for a free estimate with one of our specialized poly-foam estimators
We’re eager to start planning your sea wall repair or dam repair project with you! Contact Greene Concrete Leveling for more information on sea wall repair or to get a free quote!
Greene Concrete Leveling Co., Inc
P.O. Box 23339
Chagrin Falls, OH 44023
(440) 543-2555
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