To access the rest of the book, click here. Editor's Note: for the most part this concerns a topic that U.S. contractors would consider drilled shafts. (The term here is "filled piles;" the literal translation of the Russian term is "stuffed piles," which driven pile people might find amusing, but I thought it would be … Continue reading Manufacturing Piles Using Vibration Technology
In my recent post Dynamic Measurement of Piles the Case Method was brought up and outlined. The Case Method is one of the oldest methods developed to estimate the static capacity of piles from dynamic measurements. The method is detailed in the FHWA document Design and Construction of Driven Pile Foundations; this will serve as an … Continue reading The Case Method: An Overview and Worked Example
Editor's Note: This monograph was produced by Petro-Dynamics, Lafayette, LA. It was undated; it probably was produced in the early 1980's and was disseminated at the Offshore Technology Conference. Although it is around four decades old, the basic concepts of the Case Method and CAPWAP are still in use today. One thing that surprises is … Continue reading Dynamic Measurement of Piles
Don C. Warrington, PhD., P.E., University of Tennessee at ChattanoogaOrignal Date May 2011Revised September 2017 Methods of estimating the static capacity of driven pile are almost as numerous as the dynamic formulae of years past. As was the case with dynamic formulae, some have become embedded in codes, standards and the literature. All of these, … Continue reading The Dennis and Olson Method for Determining the Static Capacity of Driven Piles
In our last post A Tale of Two Coefficients of Restitution we discussed the development of equations of motion for impacting rams and piles that included a spring between them. This spring is bilinear using the coefficient of restitution. We showed that the behaviour of the ram and pile is the same with the spring in … Continue reading Comparing Rigid Piles with Semi-Infinite Piles/Wave Equation Piles
Most engineers are familiar from their dynamics course (assuming, of course, it was required) with the coefficient of restitution during the impact of two bodies. Then, if they're introduced to pile dynamics, they're told that certain parts of the pile-hammer-soil system have a coefficient of restitution of their own. Most of the time they're solemnly … Continue reading A Tale of Two Coefficients of Restitution
One thing that many of the "old heads" in this business wish would come back are the dynamic formulae. In some cases they're still important as they're written into the codes. So how did they come into being? As noted in my discussion of The Engineering News Formula, and Its Treatment in Early Vulcan Literature, many … Continue reading Billiards and Pile Driving: Newtonian Impact Mechanics and Dynamic Formulae
I originally posted this in 2013 on another forum. Recently I had a round of correspondence with a county official in Washington state re pile drivability studies and their place in the contract process. (If you're looking for some explanation of this, you can find it here). His question was as follows: During the bidding … Continue reading My Perspective on Driven Pile Drivability Studies
Pile Buck’s interview with Pile Dynamics, Inc. (PDI), the largest manufacturer of industry-standard, high quality Deep Foundation testing solutions, …INTERVIEW: Pile Dynamics, Inc.
From this article about the discovery of settlements 3,000 years old around Lake Lucerne in Switzerland: Experts used radiocarbon analysis to date the artifacts to about 1000 B.C., when the lake level was more than 16 feet lower than it is today, writes Garry Shaw for the Art Newspaper. According to the statement, these conditions … Continue reading Once Again, Driven Piles are First
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