Dams and Weirs: An Analytical and Practical Treatise on Gravity Dams and Weirs; Arch and Buttress Dams; Submerged Weirs; and Barrages |
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Dams and Weirs: An Analytical and Practical Treatise on Gravity Dams and ... W. G. Bligh No preview available - 2015 |
Common terms and phrases
abut adopted afflux arch ring arched dam Arrow Rock Assiut Barrage base width buttress dams canal center of pressure compression concrete consequently construction crest level crest width Croton Dam curtain Damietta depth diagram drawn drop wall effect example extrados floor foot force polygon fore apron formula foundation funicular graphical gravity dam half width head heel hydraulic gradient hydrostatic pressure ice pressure impervious inches incidence inclined intersection lamina latter length line of pressure load line masonry meters middle third Narora weir open dams overfall dam P₁ parallel percolation piezometric line polygon pressure area R₁ radius rear apron reduced reinforced Reservoir resultant reverse pressure riprap river bed rock Roosevelt dam sand shear sheet piling shown in Fig slab slope span specific gravity spillway steel tail water thickness tion trapezoid unit stress uplift vertical forces water pressure weight weir sluices weir wall
Popular passages
Page 145 - Description of Type. There is a certain type of drowned or submerged diversion weir which is built across wide rivers or streams whose beds are composed of sand of such depth that a solid foundation on clay is an impossibility. Consequently, the weir has to be founded on nothing better than the surface of the river bed, with perhaps a few lines of hollow curtain walls as an adjunct. Of this class of weir but one is believed to have been constructed in the United States, viz, the Laguna weir over...
Page 146 - A weir built on sand is exposed not only to the destructive influences of a large river in high flood which completely submerges it. but its foundation being sand, is liable to be undermined and worked out by the very small currents forced through the underlying sand by the pressure of the water held up in its rear. In spite of these apparent difficulties, it is quite practicable to design a work of such outline as will successfully resist all these disintegrating influences, and remain as solid...