While looking through some files, I found these from the original STADYN project, from the comparison case with GRLWEAP. I’m passing these along to give you an idea of the graphical output of this program. My thanks to Jonathan Tremmier of Pile Hammer Equipment for allowing me to use this copy of GRLWEAP.
For the last of the “Pile Buck Ads,” a photo of the Vulcan 530 hammer is featured in offshore stub-type leaders. The 530, introduced in 1978 for driving pipe piles offshore in the Gulf of Mexico, was and is used in a wide variety of pile driving projects. In this case it’s shown to be driving concrete cylinder piles, which have become common on larger bridge projects in the last quarter century.
The Link Belt 520 is an interesting story in itself. The diesel hammer was first developed in Germany by Delmag. After World War II, the technology was seized as Alien Property and licensed to the Syntron concern. They made two key changes to the diesel hammers. The first was to use a true atomizing injection of the fuel (as opposed to the splash system common to most diesel hammers then and now) like a conventional diesel engine. The second was to put a “bounce” chamber on top, basically a compressed air chamber to store energy on the upstroke, which was then put back into the ram during the downstroke. This increased the blow rate and shortened the stroke.
The benefits of atomized injection were and are not clear; in some cases the Link Belt hammers were found to stop the ram before it struck the anvil, thus the hammer never impacted! The bounce chamber mystified many engineers and inspectors in the day, but the concept was adopted by IHC for their hydraulic hammers in the 1980’s.
The Syntron hammer was sold to the crane manufacturer Link Belt, who in turn sold it to International Construction Equipment in the late 1970’s. They still manufacture diesel hammers but they have changed the concept of the hammer somewhat since then.
On this, the twenty-second anniversary of the beginning of this site, we present another of the ads which Pile Buck allowed us to run in their books. It shows the Vulcan #1 hammer on the South Side of Chicago. It also features the URL of the vulcanhammer.info site, which is dedicated to Vulcan hammers and is a “child” of this effort.
We thank you for your support over the years and keep coming back.