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Page 1 of 50, ©198 9,1 992 Don C. War rington VIBRATORY AND IMPACT-VIBRATION PILE DRIVIN G VIBRATORY AND IMPACT-VIBRATION PILE DRIVIN G EQUIPMENT EQUIPMENT 1 Don C. Warr ington, Vulcan Iron Works Inc. Don C. Warr ington, Vulcan Iron Works Inc. Introduction In terms of the history of technology and the speed of its advance, it has been a long time since D.D. Barkan's first vibratory pile driver turned its eccentrics in th e field back in 1949. In the Soviet Union, where this took p lace, Jose ph Stalin was still very much in charge, and the country was recovering from the horrible combination of the Purge and World War II. In the U.S., contractors were happily beating away at their piles with Vulcan, Raymond, and MKT steam impact hammers, and in Germany the Delmag organization was emerging from its own w ar reconstr uction to begin the wordwide broadca stin g of a large number of red diesel hammers. Vibratory hammers have gone on to become an important tool in the installation of a large number of pile types, and yet there is a great deal that is not under- stood about how they work and what kind of results one can expect from them. What is the be aring capacity of a pile driven by vibr ation? What kind of re- sponse will various soils give w hen vibrated? And what happens when you add impacts to the sys tem, as you do when using an impact-vibration hammer? All of these questions and others are subjects of ongoing research in many countries; however, once this is all done, it needs to be disseminated, and here too there has been inadequate effort, whether for lack of resources or desire to k eep trade secrets. In late 1989 Mr. Chris Smoot of Pile Buck approached me about putting together such an article for the newspaper and an upcoming series of books he was publi shin g. In res ponse to this, I put together both material I had already wri tten and other materials to make up the a rticle "Vibr atory Pile Dri ving Equip- ment", which appeared in Pile Buck the followi ng year. As is the cas e wi th many pr ojects, once th e project i tse lf is over one realizes that the w ork is ongoing. To be gin with, there were many items in the original article that needed expansion and also some new topics needed covering; many of these w ere pointed out by readers. In addi ti on to that, it became obvious that no comprehensive treatise on the subject of vibratory hammers was complete 1 This article was originally published in 1989 in Pile Buck . It was subsequentl y revised in 1992 and publi shed there aga in. A few r evis ions have been made for th is internet edition. All of the inform ation and data pre sented here is for gene ral inform ation only. Whi le eve ry effor t w ill be made to insure its accurac y, this infor mation should not be used or relied on for any specific application without independent, competent professional examination and verification of its accuracy, suitability and applicability by a licensed professional. Anyone making use of this information does so at his or her own risk and assumes any and all liability resulting from such use. The entire risk as to quality or usability of the information contained withi n is wi th the reade r. In no event wil l thi s web pa ge or webmas ter be held liable, nor does this web page or its webmaster provide insurance against liability, for any damages including lost profits, lost savings or any other incidental or cons equential damages arising from the use or in ability to use the information contained within.

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Page 1: Vibration and Vibroimpact D Warring Ton Paper

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