In the post Checking the Soviets: Determining the Eccentric Moment, we discussed the process of determining this parameter and more for a vibratory eccentric. The importance of the pendulum frequency--and the way that rotational moment of inertia and mass moment of inertia can easily be related with this kind of configuration--was discussed in Two Papers on … Continue reading Determining the Eccentric Moment, Rotational Inertia and Pendulum Frequency for a Vibratory Eccentric
I spent a lot of time posting Vibro-Engineering and the Technology of Piling and Boring Work and The Vibration Method of Driving Piles and Its Use in Construction. It's worth wondering if machines like these (like the one shown above) are still made and used. Wonder no more: the following YouTube video answers that question as an … Continue reading Watching a Soviet Style Electric Vibratory Driver in Action
In the earlier post Tapered Keys and Their Use In Vulcan Hammers we had a general discussion of tapered keys, the theory behind them and their application in Vulcan hammers. In this post we'll look at one specific application--the Vulcan 560 Slide Bar Key--and see how Coulombic friction applies in this case of a self-locking (hopefully) … Continue reading An Example of a Self-Locking Wedge: the Vulcan 560 Slide Bar Key
A common problem in elementary statics is picking up a load with a sling. It's an important one in heavy lifting, and Vulcan certainly experienced a great deal of that. We're going to look at an example: the Internal Pile Hammer IPH-16. It's shown with its skid on the truck above; we're going to look … Continue reading An Example of Balancing a Sling Picked-Up Load: the IPH-16
He's gone home: Dr. Lee Leon Lowery, Jr., known as “L3” to his students, passed away on February 28, 2024. He spent his lifetime learning from the world around him and in return teaching the world around him.... Dr. Lowery was a man of great intellect, generosity, and wit. He gave of himself wholly and … Continue reading RIP Lee L. Lowery, Jr.
More Resources Foundation Design and Analysis: Deep Foundations, Driven Pile Bearing Capacity (for ASD Methods) Foundation Design and Analysis: AASHTO LRFD Method Design and Construction of Driven Pile Foundations, 2016 Edition. This topic is spread out between the two volumes. Overview Engineers have always designed structures with uncertainty in mind, thus it is not permissible … Continue reading Driven Pile Design: ASD and LRFD Methods
MORE RESOURCES Foundation Design and Analysis: Deep Foundations, Pile Dynamics Design and Construction of Driven Pile Foundations, 2016 Edition. The second volume covers this topic. It should be obvious that the state of our predictive methods should make verification necessary for deep foundations, and that is certainly the case. One type of verification already discussed … Continue reading Driven Pile Design: Inverse and Verification Methods
More Resources Foundation Design and Analysis: Deep Foundations, Pile Dynamics Design and Construction of Driven Pile Foundations, 2016 Edition. The second volume covers this topic. Overview Now we come to the topic that was the genesis of this and the related sites: pile dynamics. There's quite a lot on the subject, so an extensive review … Continue reading Driven Pile Design: Wave Equation Analysis
More Resources Foundation Design and Analysis: Deep Foundations, Lateral Loading of Piles Design and Construction of Driven Pile Foundations, 2016 Edition. Having looked at axial loads on driven piles, we come to the subject of lateral loads on driven piles. Deep foundations in general are more suitable for lateral loads than shallow ones, so this … Continue reading Driven Pile Design: Lateral Loads on Piles
More Resources Foundation Design and Analysis: Deep Foundations, Driven Pile Settlement and Group Capacity Design and Construction of Driven Pile Foundations, 2016 Edition, Volume I covers the topics discussed in this post, and does so in more detail, you need to look at this if you're serious about this topic. Overview As a general rule, … Continue reading Driven Pile Design: Axial Group Bearing Capacity and Settlement
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