May 2019
Pile Driving Simulation for Vibro Hammers
While pile driving simulations for piles driven with an impact hammer are standard practice, the same cannot be said for piles that are vibrated into the ground. And so more often than not we rely on experience to select a (over dimensioned / oversized) vibro hammer for a particular application and then hope that we can drive the pile to the required depth. With Allnamic ’s AllWave-PDP software you can actually be sure that this will be the case. The total installation process is simulated and the predictions are as you would expect for any other pile driving simulation with impact hammers.
Newest Development Improving Construction and Testing of Drilled Shaft and Micro Pile Foundations
At the present, CSL Test probes are lowered down through non-structural PVC pipes. These pipes are reducing the spaces between the vertical bars, hindering a good flow of concrete to the outside of the cage. They also have a de-bonding problem with the concrete, causing misinterpreted read-out values.  

The New Development is: Using high strength hollow re-bars, originally introduced in North America by Con-Tech Systems , for CSL access pipes in combination with Higher grades of threaded steel bars, 80 and 100 KSI, with couplers. This reduces the number of bars, providing larger spaces for better concrete flow and increasing the cage stiffness. The debonding problem is also eliminated.
The Fight Against Climate Change —The Implant Structure, Climate-Resilient-Infrastructure

While drilling, slurry and cold weather don’t mix, taking a few simple precautions easily prevents damage and equipment failure from occurring. Follow the link for MATRIX Construction Products recommendations on BIG-FOOT ® Polymer Slurry Freeze Protection.
Identifying Pumping Issues and How to Solve Them
When its time to pump, is your grout or concrete falling apart under pressure? If you are having recurring pumping issues, segregation of materials could be the problem. Segregation can clog the line with hard-packed sand and stone. This is especially problematic at angled joints or after freefall. There are a handful of easy-to-run lab/field tests that can help diagnose the problem. Adjustments to the mix design can help, but often the best solution is a stabilizing additive that will improve resistance to pressure filtration. Read the full article from Specrete to learn more about how to identify and alleviate pumping issues.
About Spotlight
The Spotlight newsletters are organized by DFI’s Manufacturers, Suppliers and Service Providers (MSSP) Committee in an effort to inform the industry of the latest products and services provided by DFI Corporate Member companies. We encourage you to learn more about these companies and the solutions they provide which you may find useful on your next project. To view a complete listing of DFI’s Corporate Members or to search for a specific solution, click here .  This newsletter is just one of the activities of the MSSP committee. To find out about their activities or to join the committee visit their web page . We encourage your participation.
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This e-blast consists of submissions directly from DFI corporate member companies. The publication of this communication by Deep Foundations Institute (DFI) is not intended to warrant that the information contained herein is suitable for any general or specific use. • Neither DFI nor any of its members, directors, employees or other representatives shall be liable for damages of any kind arising out of or in connection with the use of information, processes, or products contained herein even if advised of the possibility thereof. This limitation of liability applies to claims based on breach of contract, breach of warranty, tort (including negligence), product liability or otherwise. • The contents of this e-blast reflect the views of the submitters who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of DFI.
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