Billiards and Pile Driving: Newtonian Impact Mechanics and Dynamic Formulae

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

My Perspective on Driven Pile Drivability Studies

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

Once Again, Driven Piles are First

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

Yes, Civil Engineers, Things Move

A salutary reminder from Y. Ryabov's An Elementary Survey of Celestial Mechanics: There is of course no sense in asking why the planets rotate or why they have motion in general. Everything in the universe, from the smallest dust particle to colossal cosmic bodies, is in constant motion. There is no such thing as matter … Continue reading Yes, Civil Engineers, Things Move

Concrete Pile Head Response to Impact

Our newest research item is this one, which is an expansion of the work with steel piles earlier this year. Abstract is as follows: The application of semi-infinite pile theory to the behaviour of driven piles has been studied since Parola (1970). Most of the effort, however, has been concentrated on piles which do not … Continue reading Concrete Pile Head Response to Impact

OTC 5395 Revisited: Analysis of Cushioned Pile Hammers

This is a new paper to update and expand on part of the first technical paper presented by a Vulcan employee: the paper "A Proposal for a Simplified Model for the Determination of Dynamic Loads and Stresses During Pile Driving," originally presented at the 1987 Offshore Technology Conference.  The abstract is here: Warrington (1987) was … Continue reading OTC 5395 Revisited: Analysis of Cushioned Pile Hammers

Foundation Design and Analysis: Deep Foundations, Pile Dynamics — vulcanhammer.net

https://www.youtube.com/embed/kT4KzugotJI?version=3&rel=1&fs=1&autohide=2&showsearch=0&showinfo=1&iv_load_policy=1&wmode=transparent Other Resources: Foundation Design and Analysis Home Page via Foundation Design and Analysis: Deep Foundations, Pile Dynamics — vulcanhammer.net

Foundation Design and Analysis: Deep Foundations, Overview of Driven Piles — vulcanhammer.net

  https://www.youtube.com/embed/EqOND8VEyps?version=3&rel=1&fs=1&autohide=2&showsearch=0&showinfo=1&iv_load_policy=1&wmode=transparent Other Resources: Foundation Design and Analysis Home Page Foundation Design and Analysis, Driven Piles (slide presentation) The complete site on pile driving equipment in general and Vulcan pile driving equipment in particular via Foundation Design and Analysis: Deep Foundations, Overview of Driven Piles — vulcanhammer.net

The Limitations of Dynamic Formulae

In an earlier post Vulcan's advice on the limitations of dynamic formulae--specifically referencing the Engineering News Formula--was set forth.  That advice appeared in Vulcan's literature from 1906 to 1931.  Later in the 1930's Vulcan changed the way its literature was organised, and in the process Vulcan added new verbiage (a lot of it, really) to … Continue reading The Limitations of Dynamic Formulae