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Article
SUITABLE LOCATION OF SHEET PILE UNDER DAM RESTING ON SANDY SOIL WITH CAVITY

Authors: Laith J. Aziz --- Marwa H. Abdallah
Journal: KUFA JOURNAL OF ENGINEERING مجلة الكوفة الهندسية ISSN: 25230018 Year: 2018 Volume: 9 Issue: 2 Pages: 168-188
Publisher: University of Kufa جامعة الكوفة

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Abstract

This research describes the seepage characteristics of experimental model test of dam with cutoff located at different region (at dam heel, at mid floor of dam, and at dam toe). It is resting on sandy soil with cavity at different locations in X and Y directions (such as in Al-Najaf soil city). Thirty three model tests are performed in laboratory by using steel box to estimate the quantity of the seepage and flow lines direction. It was concluded that the best location of the cutoff wall is at the dam toe for model test with cavity ( Xc B = 0 and 0.5), but for model test with cavity ( Xc B ≥1), the best location of the sheet pile wall becomes at the dam heel. For negative location of the cavity, the best location of the sheet pile wall is at the middle of the floor dam.


Article
DEVELOPMENT OF EMPIRICAL FORMULA FOR INFLUENCE OF CAVITIES ON SEEPAGE UNDER SHEET PILE WALL FOR HYDRAULIC STRUCTURES
تطوير معادلة وضعية لتأثير التكهفات على التسرب اسفل جدران الركائز اللوحية للمنشآت الهيدروليكية

Authors: Jaafar S.Maatooq جعفر صادق معتوق --- .Laith J. Aziz ليث جواد عزيز --- Taghreed A. Almahdee Musa تغريد عبد المهدي موسى
Journal: KUFA JOURNAL OF ENGINEERING مجلة الكوفة الهندسية ISSN: 25230018 Year: 2014 Volume: 5 Issue: 2 Pages: 93-106
Publisher: University of Kufa جامعة الكوفة

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Abstract

The research presents an experimental study of the interaction between cavity and adjacent hydraulic structure in sandy soil. Experimental studies were performed to investigate the effects of the different factors (such as cavity locations and size of the cavity) on the quantity of the seepage, steady time and flow line . Different sizes and locations of the cavity are investigated in flow media. It was found the diameter of the cavity is an important parameter. Dimensional analysis techniques and (STATISTICA) program were used for finding new formula with based on the experimental data, which are used to compute the quantity of seepage. This formula was derived to predict the quantity of the seepage in terms of spacing between the sheet pile wall and center of the cavity in upstream and downstream zones, spacing between water level and center of the cavity in upstream and downstream zones.

يشمل البحث دراسة مختبريه لإيجاد التفاعل بين الفجوة والجدران الساندة المجاورة في الترب الرملية. انجزت الدراسة المختبرية لتخمين تأثيرات العوامل المختلفة (موقع الفجوة, قطر الفجوة) على كمية التسرب مع الزمن وخطوط الجريان. اقطار ومواقع مختلفة تم دراسة تأثيرها في وسط الجريان. وجد ان قطر التكهف هو اهم عامل. تقنية التحليل البعدي والبرنامج الاحصائي (STATISTICA) تم استخدامهم لإيجاد المعادلة الوضعية استنادا على البيانات المختبرية لحساب كمية التسرب . هذه المعادلة اشتقت لحساب كمية التسرب في صيغة المسافة بين الجدران الساندة ومركز التكهف في منطقة الجهد العالي والجهد الواطئ ,المسافة بين منسوب الماء ومركز التكهف في منطقة الجهد العالي والجهد الواطئ.

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