Engineers consider stability controls such resistance to sliding and overturning when developing gravity dams. Allowable vertical strains at the dam's heel and toe are other important characteristics. The width and height of the dam are two crucial design characteristics to consider. Dam stability can also be improved by adding features like a drainage gallery. The location of the drainage gallery and its impact on dam stability are explored in this study. The relative uplift force (Up/W) in the Outardes-3 Dam without a drainage gallery has a constant value of 0.413, according to the results (where Up is the uplift force and W is the weight of the gravity dam). The favourable effect of drainage galleries is seen by the reduction of Up/W to 0.14 for installations with a drainage gallery at the dam heel. A vertical tensile stress occurs in the dam's upstream heel when b/B>0.32. As a result, this is not advised (B is the dam width and b is the distance of the drainage gallery from the dam heel). It is proposed that a value of 0.75B/H1.0 be used (H is the dam height). Without a drainage gallery, the safety factor against overturning is close to its maximum values in this case, which improves the dam's safety. With a B/H greater than 0.7, the vertical tension in the dam's upstream heel is compressive, and no tensile stress is generated.
Author(S) Details
Farzin Salmasi
Department of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
John Abraham
University of St. Thomas, Minnesota, School of Engineering 2115 Summit Avenue St. Paul, Minnesota 55105, USA.
View Book:- https://stm.bookpi.org/NPER-V10/article/view/6502
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