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Register a new userAnalysis the Effect of Variation in Vertical Core Thickness on Stability of Earth Dams (Case Study: Dwesat dam)
تحليل تأثير سماكة النواة العمودية على استقرار السدود الترابية (حالة سد الدويسات)
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فاطمة فويتي( باحث )
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في هذا البحث تم دراسة تقييم استقرار سد الدويسات ذي النواة الشاقولية و الارتفاع 33 م، ميل الجانب الخلفي 1V:2.75H و ميل الجانب الأمامي 1V:3H ، كما سيتم دراسة تغير سماكة النواة من 1V:0.25H إلى 1V:2.0H و تأثيرها على استقرار جانبي السد الأمامي و الخلفي و ذلك لثلاث حالات تصميمية هي خلال فترة بناء السد، التسرب المستقر، و التفريغ السريع، و ذلك باستخدام طريقة التوازن الحدية العامة و حزمة البرامج GeoStudio. و قد تبين من التحليل أته بتغير سماكة النواة الشاقولية للسد، فإن النواة ذات السماكة الأقل تعطي استقراراً أكبر و أن الزيادة في سماكة النواة لميول أكبر تسبب انخفاضاً حاداً لعامل أمان الوجهين الأمامي و الخلفي للحالات التصميمية الثلاثة الآنفة الذكر.
Therefore in this paper we will present the stability analysis carried out on the Dwesat dam with vertical core, its high is 33m, the downstream slope of 1V:2.75H and the upstream slope of 1V:3.0H. Thickness of the vertical core was varied from 1V:0.25H to 1V:2.0H, and also present the effect of the varied thickness on slope stability for both upstream and downstream under three design conditions i.e. during and end of construction, steady state seepage and rapid draw down by General Limit Equilibrium Method using GeoStudio software. It was observed from the analysis that by varying the thickness of vertical core of earth dam, thinner core up to 1V:1.30H gives more stability and further increase in thickness of core tends to sharp decline in factor of safety for both upstream and downstream slope under different design conditions.
Artificial intelligence review:
Research summary
تتناول هذه الدراسة تحليل تأثير سماكة النواة العمودية على استقرار السدود الترابية، مع التركيز على سد الدويسات كنموذج. تم استخدام طريقة التوازن الحدية العامة وبرنامج GeoStudio لتحليل استقرار السد في ثلاث حالات تصميمية: خلال فترة بناء السد، التسرب المستقر، والتقريخ السريع. أظهرت النتائج أن النواة ذات السماكة الأقل تعطي استقراراً أكبر، وأن زيادة السماكة تؤدي إلى انخفاض حاد في عامل الأمان للوجهين الأمامي والخلفي في الحالات الثلاثة المدروسة. تم تحليل البيانات باستخدام حزمتي البرامج seep/w وslope/w من Geo-Slope، وأظهرت النتائج أن السدود ذات النواة الأقل سماكة تعتبر أفضل من الناحية الاقتصادية، خاصة في المواقع التي تتوفر فيها كميات كبيرة من مواد البناء النفوذة وكميات ضئيلة من التربة الكتيمة.
Critical review
تعتبر الدراسة شاملة ومفصلة، حيث تناولت تحليل استقرار السدود الترابية من جوانب متعددة واستخدمت أدوات تحليل متقدمة. ومع ذلك، يمكن أن تكون هناك بعض النقاط التي تحتاج إلى توضيح أكثر، مثل تأثير العوامل البيئية الأخرى على استقرار السد، وكيفية التعامل مع التغيرات المناخية المحتملة. كما أن الدراسة قد تكون أكثر فائدة إذا تضمنت مقارنة مع دراسات أخرى مشابهة لتأكيد النتائج وتوسيع نطاق التطبيق.
Questions related to the research
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ما هي الحالات التصميمية الثلاث التي تم تحليلها في الدراسة؟
الحالات التصميمية الثلاث هي خلال فترة بناء السد، التسرب المستقر، والتقريخ السريع.
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ما هي الطريقة المستخدمة لتحليل استقرار السدود في الدراسة؟
تم استخدام طريقة التوازن الحدية العامة وبرنامج GeoStudio لتحليل استقرار السدود.
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ما هو تأثير زيادة سماكة النواة على استقرار السدود الترابية؟
زيادة سماكة النواة تؤدي إلى انخفاض حاد في عامل الأمان للوجهين الأمامي والخلفي في الحالات الثلاثة المدروسة.
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لماذا تعتبر السدود ذات النواة الأقل سماكة أفضل من الناحية الاقتصادية؟
تعتبر السدود ذات النواة الأقل سماكة أفضل من الناحية الاقتصادية لأنها تتطلب كميات أقل من التربة الكتيمة التي تكون عادة أكثر تكلفة من مواد البناء النفوذة.
References used
BISHOP A.W., BLIGHT G.E., -Some aspects of effective Stress in Saturated and unsaturated soils, Geotechnique, VOL. 13 , No 3, 1963
BISHOP A.W., MORGENSTREN N.R., - Stability coefficients for earth slopes, Geotechnique , VOL. 10 , No. 4. 1960
FREDLUND D. G., RAHARDIO H., - Soil Mechanics for un saturated soils, John wiley & sons , Newyork. 1993
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