As a consultant on many deep soil geotech jobs over the years, I have found myself recommending one critical piece of equipment repeatedly: The Dynamic Cone Penetrometer (aka the DCP). I highly recommend this tool as an essential part of your Deep Lift® rig set up. As Jim Spiegel explained in his blog post on this subject, this device is used to measure the strength of subgrade soils, and can be utilized to identify weak layers of soil within a soil mass. As you can see in the video below, a hydraulic pump drops a 30kg (60lb) hammer, driving the measuring rod into the ground.
To measure soil strength, the operator counts the number of blows it takes to drive the steel rod in 10-centimeter increments. Good soil requires 10+ blows to drive the rod 10 centimeters. Anything less is typically indicative of weak soil conditions.
DCP testing is a widely accepted means of in situ testing. Due to the common acceptance of DCP testing, many municipalities and agencies are willing to pay for this service.
Here is a hypothetical scenario for DCP use:
Soil strength data is needed under a concrete parking lot before a Deep Lift® job. Multiple tests would be performed, spread out evenly over the area. For thorough testing, each DCP test would be executed to a minimum depth of 15 – 20 feet or refusal (when the hammer blows no longer cause movement.) The test results can then be compared and analyzed to find where potential weak soil conditions may be present. This allows for accurate and effective application of the polymer to address the weak layers.
DCP testing can also be utilized prior to bidding any Deep Lift® job to develop effective injection plans, as well as accurately estimate material usage on projects. With that said, it’s not always possible or practical to perform pre-bid testing. When pre-bid testing is not performed, it would still prove highly beneficial to perform DCP testing prior to injection. I have personally encountered many situations where injection plans have been drastically altered after test results were analyzed (injection depth was added or subtracted, the weakest layers were identified, etc.) The Dynamic Cone Penetrometer is a portable tool which can easily be used in many locations where other testing methods are not feasible and it provides valuable insight into the soil conditions that need to be improved.
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As the Director of Technical Services for the Leak Seal division at Alchemy-Spetec, I often find myself assisting customers with some interesting jobs. Such was the case when I was called in to consult with a contractor who was sealing a leak in a historic district below-grade, multi-course brick wall. As is often the case with below grade, historic spaces, water infiltration was unsightly, gave off a musty odor, and was damaging to finishes. This was a very old brick wall, approximately 8 x 15 feet in size and at least three courses thick. The owner wanted to find a way to waterproof this vintage brick structure while at the same time preserving its unique appearance. In addition to the water flow issue, the leaks were causing mold/mildew on the walls.
On this episode of 
A self-described philanthropic entrepreneur, David Park is committed to creating value-driven opportunities that are both scalable and profitable. He has spent the last 15 years developing communities, organizations, and businesses by leading them to discover their full potential, develop a wider vision, and determine the best course of action to achieve their goals.
With over 10 years of experience, Joel has a broad understanding of general practices in the construction and services industries. He has spent the last 6 years focused on ground improvement by use of chemical grouting with structural polymers, and possesses both technical and marketing expertise. His background includes contract negotiations, injection plan design, project management, market education, and hands on application of a variety of polymer solutions. Joel utilizes his industry knowledge to assist contractors with marketing strategies, material needs, and product application. Located in the Pacific Northwest, he enjoys his spare time in the great outdoors.
With 1,350 miles of coastline, Florida is home to countless seawalls. If you're a property owner or manager in the Sunshine State, you have landed in the right place. Alchemy-Spetec provides 
In January of 2020, Alchemy-Spetec launched 
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