You might not think that geotechnical engineering would have anything to do with the Apollo 11 mission that put the first humans on the surface of the moon, but you would be wrong. The landing pads of the lunar excursion module (LEM) had to act as footings on the surface of the moon. If they […]

via Geotechnical Engineering on the Moon? 50th Anniversary of Apollo 11 Landing — GeoPrac.net

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Geotechnical Engineering on the Moon? 50th Anniversary of Apollo 11 Landing — GeoPrac.net

Posted in STADYN

STADYN Wave Equation Program 11: Application of the STADYN Program to Analyze Piles Driven Into Sand

The newest update for the STADYN research project is available:

Application of the STADYN Program to Analyze Piles Driven Into Sand

The abstract is as follows:

Abstract: The STADYN program was developed for the analysis of driven piles both during installation and in axial loading. Up until now the test cases used were in predominantly cohesive soils. In this paper, the expansion of the program’s use into predominantly cohesionless stratigraphies has required consideration of two important factors. The first is the difference between strain-softening in clays as opposed to sands, and additionally static vs. dynamic strain effects. This requires a review of the whole concept of the “magical radius” for pile elasticity. The second is the effect of dilatancy on the response of the pile to axial loading. Both of these are discussed in this paper, and test cases are presented to illustrate the application of the program to actual driven piles.

It can also be found on Researchgate.

Posted in Pile Driving Equipment

Pile Buck Ads 3: Nilens Diesel Hammer Driving Sheet Piles

The third in our series of vulcanhammer.net ads for Pile Buck include this one, showing a Nilens diesel hammer driving sheet piling using a “spud” or “rail” type leader in the back.  Nilens was one of Vulcan’s more interesting adventures in pile driving equipment.  The method used is a typically European practice that has found its way to American sheet piling sites, mostly due to the Delmag hammer and its progeny.

More about European concepts of installing sheet piling are here.

Posted in Pile Driving Equipment

The Pile Buck Ads 2: Vulcan #1 Hammer in Action

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.

Posted in Pile Driving Equipment

The Pile Buck Ads 1: Vulcan 3100 Assembled

This site has never had an “advertising budget” but in the last decade the publisher Pile Buck gave it the opportunity to advertise itself in its books Sheet Pile Design by Pile Buck and Pile Driving by Pile Buck.  There were five in the series, and this is the first, using the assembly of the first 3100 hammer as a backdrop.

The ads were placed before the inception of the one site not mentioned on the ad: vulcanhammer.info, so the “Wave Equation for Piling” was still on this site.  More about the Vulcan 3100 is here.