EFFECT OF HORIZONTAL DRAIN ON THE STABILITY OF HOMOGENEOUS EARTH DAM UNDER RAPID DRAWDOWN CONDITIONS

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MALEKPOUR A.; FARSADIZADEH D.; HOSEINZADE DALIR A.; SADR KARIMI J.

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Journal: Water and Soil Science Year:2012 | Volume:22 | Issue:2 Page(s): 107-119

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Title

EFFECT OF HORIZONTAL DRAIN ON THE STABILITY OF HOMOGENEOUS EARTH DAM UNDER RAPID DRAWDOWN CONDITIONS

Author(s)

MALEKPOUR A. | FARSADIZADEH D. | HOSEINZADE DALIR A. | SADR KARIMI J. | Issue Writer Certificate

Keywords

HOMOGENEOUS EARTH DAMQ4

HORIZONTAL DRAINQ4

PORE WATER PRESSUREQ4

RAPID DRAWDOWNQ4

SAFETY FACTORQ3

Abstract

In earth dams, the RAPID DRAWDOWN process creates a pressure gradient between the embankment and reservoir. This pressure gradient which is due to the temporal delay that is required for dissipating excessive PORE WATER PRESSURE existing in the upstream slope, may let the upstream slope to be prone to failure. In this research, the effect of length and thickness (of HORIZONTAL DRAIN) on upstream slope stability under RAPID DRAWDOWN conditions were considered in a model of HOMOGENEOUS EARTH DAM. The factor of safety for different drain dimensions immediately after drawdown ranged within 1.5-2.6 and 1.3-2.2 for superficial and deep slips, respectively, and increased with time to 2-3 and 2.2-3 for the drain with maximum effective length and thickness. Moreover, for drawdown ratio of less than 0.3, drain with the length ratio (drain length to water depth in reservoir) of 0.43 assured the stability. For the greater ratios of drawdown, drain length ratio of 0.71 with medium thickness provided the stability against sliding.

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APA: Copy

MALEKPOUR, A., FARSADIZADEH, D., HOSEINZADE DALIR, A., & SADR KARIMI, J.. (2012). EFFECT OF HORIZONTAL DRAIN ON THE STABILITY OF HOMOGENEOUS EARTH DAM UNDER RAPID DRAWDOWN CONDITIONS. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), 22(2), 107-119. SID. https://sid.ir/paper/147759/en

Vancouver: Copy

MALEKPOUR A., FARSADIZADEH D., HOSEINZADE DALIR A., SADR KARIMI J.. EFFECT OF HORIZONTAL DRAIN ON THE STABILITY OF HOMOGENEOUS EARTH DAM UNDER RAPID DRAWDOWN CONDITIONS. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE)[Internet]. 2012;22(2):107-119. Available from: https://sid.ir/paper/147759/en

IEEE: Copy

A. MALEKPOUR, D. FARSADIZADEH, A. HOSEINZADE DALIR, and J. SADR KARIMI, “EFFECT OF HORIZONTAL DRAIN ON THE STABILITY OF HOMOGENEOUS EARTH DAM UNDER RAPID DRAWDOWN CONDITIONS,” WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), vol. 22, no. 2, pp. 107–119, 2012, [Online]. Available: https://sid.ir/paper/147759/en

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