Author: LOYAL WINGATE TRUMBULL | Size: 7.9 MB | Format:PDF | Quality:Original preprint | Publisher: THE McGeAW-HiLL BoOK COMPANY | Year: 1910 | pages: 304
Surveying is the art of making measurements which determine the relative position of two or more points. Mine surveying is the art of surveying underground openings, i. e., finding the relative positions of points under the surface, or the position of points underground relative to points upon the surface. The angles and distances measured are usually drawn to scale upon various planes and mine maps thus produced.
In mine surveying there are but few operations different from those of plane surveying. The application of the same principles to the different conditions, along with a greater degree of accuracy, insures success underground.
T. A. 'Donahue, in 'Colliery Surveying,' says: 'Surveying is the art of taking such measurements and observations of an object as will enable a true proportionate representation to be drawn on a plane surface. The principles upon which it depends are all embodied in the science of geometry; so that surveying may be said to be a practical application of geometry.'
Johnson, in his 'Theory and Practice of Surveying,' p. 431, says: 'Surveying is an art, not an exact science.' This should be kept constantly in mind, and in every case that method which promises the minimum deviation from the scientifically correct result should be employed.
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Posted by: apocalipse - 12-07-2012, 11:50 AM - Forum: Archive
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Dear members,
can someone share this code:
ESAA C(b)1-2003
ESAA Guidelines for design and maintenance of overhead distribution and transmission lines
link:
Code:
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Posted by: apocalipse - 12-07-2012, 11:27 AM - Forum: Archive
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Dear members,
can someone share this article:
Influence of second order effects on the behavior of
transmission line towers
Author:
Samuel Knight G M
Link:
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Posted by: apocalipse - 12-07-2012, 10:23 AM - Forum: Archive
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Dear members,
can someone upload this article
Cause analysis of tower falling down and ice accretion in Hunan 500kV power transmission line
Authors:
LIU Chun,LU Jia-zheng,CHEN Hong-dong(Hunan Electric Power Test and Research Institute,Changsha 410007,China)
Abstract
The tower falling down in Hunan 500kV Fusha lineⅠis modeled by large universal finite element software ANSYS,the ultimate load-carrying capacity of tower is calculated as the variation of the thickness of line ice accretion,and the cause of the tower falling down is analyzed.According to calculation result,two partial strengthen projects are calculated and checked,and countermeasures are suggested.
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Posted by: apocalipse - 12-07-2012, 09:59 AM - Forum: Archive
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Dear members,
can someone get this code:
AS/NZS 7000:2010
Overhead line design - Detailed procedures
More information:
Code:
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Posted by: apocalipse - 12-07-2012, 09:51 AM - Forum: Archive
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Dearl all,
can someone upload this book
Wind Effects on Structures
Author:S K Agarwal
More information:
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Author: Thomas Everit Coleman | Size: 3.17 MB | Format:PDF | Quality:Scanner | Publisher: E. & F. N. SPON, | Year: 1909 | pages: 182 | ISBN: 1429777559
This small volume is intended to serve as a practical
guide for students and others interested in the general
design and construction of ordinary retaining walls.
The essential principles which govern a sound know-ledge of this branch of engineering are explained in
detail, whilst at the same time the use of complicated
formulas and advanced mathematics have been avoided
as much as possible.
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Posted by: japon - 12-07-2012, 09:21 AM - Forum: Archive
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hey guys,
i'm looking for this presantation
Implications of the new Eurocode EN1991-4 on the design of Cement and Raw Meal Storage Silos
CemTech 2006, Hugh McKay and James Durack
Author: J. E, KIRKHAM | Size: 97.649 MB | Format:PDF | Quality:Scanner | Publisher: mc graw hill book co | Year: 1914 | pages: 696 | ISBN: B0010XDPTE
This book is intended as a textbook for college students and as a self-explanatory manual of structural engineering for practical
men.
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Dear all, i appreciate if anyone could upload the following paper:
ANALYSIS OF TRANSMISSION TOWER DYNAMIC CHARACTERISTIC
Authors
Li Haiwang Chen Kaixuan
Abstract
Since snow disaster to the electric power facility’s huge destruction, the dynamic properties of the electric transmission tower are analyzed with the ANSYS procedure,in order to consider the influences on the dynamic properties of the tower wrapped by a variety of ice thickness.The analytical results indicate the natural frequency of tower will reduce with the increase of wrapped ice thickness,especially when wrapped ice thickness reached 50-60 mm. The decrease range more than 30 percent. The change of dynamic characteristics have a greater influence on for the dynamic response of structures under action of the earthquake and wind.This paper lays a good foundation for the later dynamic properties research under action of earthquakes or wind.
The link to the paper
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