EFFECT OF HORIZONTAL DRAINS ON UPSTREAM SLOPE STABILITY DURING RAPID DRAWDOWN CONDITION

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ZOMORODIAN S.M.ALI; ABODOLLAHZADEH S.M.

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Journal Paper

Paper Information

Journal: JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING (UNIVERSITY OF TABRIZ) Year:2012 | Volume:42 | Issue:1 (66) Page(s): 29-34

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Title

EFFECT OF HORIZONTAL DRAINS ON UPSTREAM SLOPE STABILITY DURING RAPID DRAWDOWN CONDITION

Author(s)

ZOMORODIAN S.M.ALI | ABODOLLAHZADEH S.M. | Issue Writer Certificate

Keywords

EARTH FILL DAMS

RAPID DRAWDOWN

DRAIN

STABILITY

FINITE ELEMENT METHOD

LIMIT EQUILIBRIUM METHOD

Abstract

Embankments may become saturated by seepage flow during a long term high reservoir stage. If subsequently the reservoir pool is drawn down faster than the pore water can escape, excess pore water pressures and reduced STABILITY will result. This is called drawdown which is quite common in upstream slopes of embankment dams. The STABILITY of slopes under drawdown conditions are usually analyzed considering two limiting conditions, namely slow and RAPID DRAWDOWN. In the slow drawdown situation the water level within the slope is assumed to equalize the reservoir level at any time. In case of RAPID DRAWDOWN, which represents the most critical condition, it is assumed that the pore water pressure within the embankment continues to reflect the original water level. The lag of the phreatic line depends on factors such as: permeability of soils, drawdown rate, drawdown ratio and slope gradient. RAPID DRAWDOWN can cause a temporary increase in pore water pressure. The increased seepage forces may lead to slope instability, causing the collapse of structure. This paper discusses the effect of horizontal DRAINs on upstream slope of EARTH FILL DAMS during RAPID DRAWDOWN using finite elements and LIMIT EQUILIBRIUM METHODs. The change of pore water pressure, outpouring seepage flow and the factor of safety are inspected.

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APA: Copy

ZOMORODIAN, S.M.ALI, & ABODOLLAHZADEH, S.M.. (2012). EFFECT OF HORIZONTAL DRAINS ON UPSTREAM SLOPE STABILITY DURING RAPID DRAWDOWN CONDITION. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING (UNIVERSITY OF TABRIZ), 42(1 (66)), 29-34. SID. https://sid.ir/paper/340434/en

Vancouver: Copy

ZOMORODIAN S.M.ALI, ABODOLLAHZADEH S.M.. EFFECT OF HORIZONTAL DRAINS ON UPSTREAM SLOPE STABILITY DURING RAPID DRAWDOWN CONDITION. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING (UNIVERSITY OF TABRIZ)[Internet]. 2012;42(1 (66)):29-34. Available from: https://sid.ir/paper/340434/en

IEEE: Copy

S.M.ALI ZOMORODIAN, and S.M. ABODOLLAHZADEH, “EFFECT OF HORIZONTAL DRAINS ON UPSTREAM SLOPE STABILITY DURING RAPID DRAWDOWN CONDITION,” JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING (UNIVERSITY OF TABRIZ), vol. 42, no. 1 (66), pp. 29–34, 2012, [Online]. Available: https://sid.ir/paper/340434/en

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