| 词条 | J. Augustine DeSazilly |
| 释义 |
J. Augustine DeSazilly (fl. mid-19th century) was a French engineer. In the early 1850s, DeSazilly published a paper postulating the "profile of equal resistance," a major theoretical advance in the technology of masonry gravity dams, based on the hydrostatic force exerted by a given height of water in relation to the weight of masonry used in the dam's construction (estimated at 150 pounds per cubic foot). DeSazilly considered two extreme conditions, a filled reservoir and an empty reservoir, and created a model for equalizing stresses on the masonry across every horizontal cross section. He developed a vertical cross section in which the stresses at the upstream face of a masonry gravity dam with the reservoir empty are equal to those at the downstream face with the reservoir filled. His hypothesis provided a means of calculating the minimum amount of material that could be used while assuring stability. Although he himself never carried out the construction of a dam on this "profile of equal resistance," it was used in 1858 to build the Furens Dam across the Loire River.[1] DeSazilly also developed a process of surface drainage for building on a slope,[2] and contributed to the building of railways,[3] roads, and bridges.[4] References1. ^Donald C. Jackson, Building the Ultimate Dam: John S. Eastwood and the Control of Water in the West (University of Oklahome Press, 2005), pp. 22–23 [https://books.google.com/books?id=Cx82Xq2WAlcC&pg=PA23&lpg=PA23&dq=%22Gileppe+Dam%22&source=bl&ots=qTw2j9nx_a&sig=SbX8jYeys9t9tbQpMja0Z4gPo_c&hl=en&ei=MvtfTMLNDJn_lQe5jvDQDw&sa=X&oi=book_result&ct=result&resnum=39&ved=0CKMBEOgBMCY4ZA#v=onepage&q=%22Gileppe%20Dam%22&f=false online.] 2. ^Charles Couche, Permanent Way Rolling Stock and Technical Working of Railways (London, 1877, translation of French edition) vol. 1, p. 471 [https://books.google.com/books?id=5A8mAAAAMAAJ&pg=PA471&dq=DeSazilly&hl=en&ei=0lJgTMPXJsSBlAfxxon4Ag&sa=X&oi=book_result&ct=result&resnum=3&ved=0CDYQ6AEwAg#v=onepage&q=DeSazilly&f=false online.] 3. ^Annales des ponts et chaussées (Paris, 1852), pp. 93–93 [https://books.google.com/books?id=fKw1AAAAMAAJ&pg=PA93&dq=DeSazilly&hl=en&ei=0lJgTMPXJsSBlAfxxon4Ag&sa=X&oi=book_result&ct=result&resnum=7&ved=0CFAQ6AEwBg#v=onepage&q=DeSazilly&f=false online]; Annales des mines 5 (1854), pp. 411–412 [https://books.google.com/books?id=VeU6AAAAcAAJ&pg=PA411&dq=DeSazilly&hl=en&ei=0lJgTMPXJsSBlAfxxon4Ag&sa=X&oi=book_result&ct=result&resnum=31&ved=0COIBEOgBMB4#v=onepage&q=DeSazilly&f=false online]; Auguste Perdonnet, Traité élémentaire des chemins de fer (Paris, 1865),vol. 1, p. 458 [https://books.google.com/books?id=Lu1CAAAAIAAJ&pg=PA458&dq=DeSazilly&hl=en&ei=0lJgTMPXJsSBlAfxxon4Ag&sa=X&oi=book_result&ct=result&resnum=10&ved=0CGIQ6AEwCQ#v=onepage&q=DeSazilly&f=false online.] 4. ^French Ministry of Agriculture, Commerce, and Public Works, Notices sur les modèles, cartes et dessins relatifs aux travaux publics (Paris, 1867), p. 27 [https://books.google.com/books?id=5mQJAAAAIAAJ&pg=PA27&dq=DeSazilly&hl=en&ei=0lJgTMPXJsSBlAfxxon4Ag&sa=X&oi=book_result&ct=result&resnum=18&ved=0CJUBEOgBMBE#v=onepage&q=DeSazilly&f=false online]; Annales des ponts et chaussées 13 (1887), p. 675 [https://books.google.com/books?id=49Y8AAAAYAAJ&pg=PA675&dq=DeSazilly&hl=en&ei=0lJgTMPXJsSBlAfxxon4Ag&sa=X&oi=book_result&ct=result&resnum=14&ved=0CHoQ6AEwDQ#v=onepage&q=DeSazilly&f=false online.] External links
7 : 19th-century French people|French engineers|French civil engineers|Structural engineers|Hydraulic engineers|Year of birth missing|Year of death missing |
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