A digital copy of the advertisement above came into my possession recently. Much of the development of this site has involved research and some educated (hopefully) guesswork as to the date and purpose of a drawing, photograph or other document. This one raises some interesting questions in a number of ways which we will explore. … Continue reading The “Vulcan Overview”: Unravelling Its Mysteries
For more of this book, click here. The issue of decommissioning water wells and ground-freezing wells arises in cases where these wells have fulfilled their task (drainage or ground freezing) or their operation (water supply wells) has ceased to be expedient due to a decrease in productivity that can no longer be restored. Solving the … Continue reading Casing Pipe Extraction During Well Decommissioning
For more of this book, click here. If water-bearing formations consist of sands, it is advisable to install wire-wound filters with a gravel pack in the wells. This pack improves the filtration characteristics of the zone around the filter. It also increases well productivity and stabilizes its operation as a water source. One of the … Continue reading Installation Of Filter Columns When Constructing Gravel-Packed Wire-Wound Filters In Water Wells
For more of this book, click here. In the process of percussion-cable drilling, bore hole walls are reinforced with casing pipes to prevent collapse and to isolate water-bearing horizons. The low driving capacity of a drilling tool and the lack of reliable means for extracting intermediate columns when filters are exposed lead to a situation … Continue reading Immersion And Extraction Of Casing Pipes In The Process Of Percussion-Cable Drilling Of Boreholes
Vulcan sometimes liked to think that it was the "only game in town" when it came to pile drivers. But we knew it wasn't true. Before diesel and vibratory hammers became common and air/steam hammers "ruled the roost" Vulcan's main competitor was McKiernan-Terry (MKT.) Based in northern New Jersey (its last facility there was in … Continue reading McKiernan-Terry
The GeoInstitute has chosen to feature George Goble's Terzaghi Lecture, it's here: https://youtu.be/ujXSyvB4iPc?si=6xdRze61jFt-KiFf He covers the waterfront (complete with a major marine project) on the WEAP/CAPWAP method of pile dynamics. The methods he and his colleagues pioneered have become standard in driven pile practice. I have a few comments on the lecture as follows: He … Continue reading George Goble’s 2007 Terzaghi Lecture
In the earlier post Some Insight into the Origin of Vulcan’s Pile Hammer Valve System we looked at the Corliss valve and its application first to steam engines and later pile hammers. In this post we'll look at these engines from another standpoint: analysing their rotational action using the method of instantaneous centre of rotation. The … Continue reading Solving a Dynamics Problem using the Instantaneous Centre of Rotation with a Vulcan Design
As we saw in the previous post, Sanders' Formula wasn't the last word in dynamic formulae, and neither were Weisbach's. Faced with this proliferation, the U.S. Army Corps of Engineers put together the document Pile Foundations and Pile-Driving Formulae, Circular No. 17, Office of the Chief of Engineers, U.S. Army. It was dated 28 November … Continue reading Putting Dynamic Formulae to the Test: the Proctorsville Fort Project
At the start of this, it's probably worthwhile to repost the following: In the early 1970’s, when the Brezhnev era seemed most full of promise, an elderly Frenchman travelled from Moscow to Khabarovsk on the Trans-Siberian railway. After only a few hours at the eastern end of the line he boarded the train again for … Continue reading Diesel Hammers: The Russian Hammers and Hemi-Headed Pile Drivers
The classic Delmag diesel hammer, a D-30, early 1990's. In Diesel Hammers: Some Basic Thermodynamics, and the Mean Effective Pressure it was noted that the diesel hammers were developed in Germany between the World Wars. The Germans went to war the second time with diesel hammers in hand to aid their war effort. (The U.S. did … Continue reading Diesel Hammers: Delmag, Nilens and the Method of Analysis
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