چکیده مقاله
In this paper, the effects of rate of lowering of reservoir water level, embankment geometry and constituent material engineering properties on the pore water pressure pattern in embankment areexamined with and without considering stress dependency of soil permeability For this purpose, coupled transient seepage and deformation analyses were carried out It was disclosed that, considering consolidation effects, the phreatic surface in clay core would change slower than if it was not taken intoaccount For a 34 m wide and 59 m high clay core with very low permeability, say K = 10 8cm/s, even a draw down rate as low as 1 cm/day, leads to occurring rapid drawdown In the other hand if the core permeability is 10 5 cm/s rapid draw down will not occur provided that the rate of draw down is not greater than 5 cm/day Consequently, from the view point of earth dam engineering, highly impermeable materials, such as high plasticity clayey soils, are not reasonable for using in core zone Using achievements of this piece of work suitable drawdown programs may be set up for earth dams
کلیدواژهها
نویسندگان
F. B. Sarand
PhD student, Geotechnical engineering
J Sadrkarimi
Associate professor
M. H. Bonab
F. B. Sarand PhD student, Geotechnical engineeringJ Sadrkarimi Associate professor
شیوه ارجاع
Sarand, F. B. and Sadrkarimi, J and Bonab, M. H.,1391,The Effect of Core Permeability on Rapid Drawdown in Embankment Dams,9th International Congress on Civil Engineering,Isfahan
ارائهشده در
مجموعه مقالات نهمین کنگره بین الملی مهندسی عمران19 اردیبهشت 1391 · اصفهان