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
It's my custom to review papers which cite my own work. This pair of papers, whose lead author is Tu Yuan from Zhejiang Sci-Tech University in Hangzhou, China, is interesting because it take an approach whose basic concept goes back a long way in pile dynamics and which needed some basic advancement. The two papers … Continue reading Comments on “Nonlinear fictitious-soil pile model for pile high-strain dynamic analysis” and “Fictitious soil pile model for dynamic analysis of pipe piles under high strain conditions”
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
Now we get into a topic that's potentially controversial: the energy rating of diesel hammers, or any impact hammer for that matter. Let's start with defining what we mean by rated energy. Efficiency and Rated Striking Energy Hibbeler (1989) defines mechanical efficiency as follows: $latex e = \frac{Energy\,Output}{Energy\,Input} $ (15) A quick look at Equation … Continue reading Diesel Hammers: Rated Striking Energy, and Should Diesel Hammers Be Derated?
It is my custom to link to and make comments on papers which cite my work. This paper is titled Construction of a mathematical model of dynamic loads in a jib self-propelled crane when pulling a sheet pile out of the ground. It comes from Ukraine, and it is the first study of its kind … Continue reading Comments on “Construction of a mathematical model of dynamic loads in a jib self-propelled crane when pulling a sheet pile out of the ground.”
As noted elsewhere, Vulcan got itself into many products outside of pile driving equipment. One of those was railroad equipment. Some of these didn't work out as planned, as was the case with the Caldwell Steam Snow Plow. Others, ostensibly, had a happier outcome for everyone. In the absence of evidence to the contrary, one of … Continue reading The Hicks Track Laying Machine, and an Example of Belt/Band Friction
vulcanhammer.info 