Earth Dams Naji Khoury, Ph.D., P.E. Assistant Professor, NDU - - - PowerPoint PPT Presentation

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Earth Dams Naji Khoury, Ph.D., P.E. Assistant Professor, NDU - - - PowerPoint PPT Presentation

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Earth Dams Naji Khoury, Ph.D., P.E. Assistant Professor, NDU - Louaize January 22, 2015 Presentation Outline Dam Safety - - Design and Construction of Sustainable Earth Dams

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Earth Dams

دودسلاةيبارتلا

Naji Khoury, Ph.D., P.E.

Assistant Professor, NDU - Louaize January 22, 2015

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Presentation Outline

  • Dam Safety دودسلا ةملبس
  • Design and Construction of Sustainable Earth Dams

ءانبةمادتسم ةيبارت دودس

  • Inspection and Maintenance of Earth Dams

ةبقارم ةنايصودودسلا

  • Geophysical Techniques

لامعتسا تاينقتةيئايزيفويج

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DAM SAFETY (دودسلا ةملبس)  DAM: Artificial Barrier (يعانطصا زجاح)  Earth Dam ( دودسلاةيبارتلا)

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DAM SAFETY (دودسلا ةملبس) (cont’d) Hazard Classification (رطخلا فينصت) Class I: probable loss of life, major property losses رطخلا فينصت تاكلتمملا يف رئاسخ و ،ةايحلل ةلمتحم ةراسخةيسيئرلا Class II: high value property, economic loss ةيدام ةراسخ تاكلتمملاةيلاعلا ةميقلا تاذ Class III: limited property loss ةدودحم ةراسخ

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DAM SAFETY (دودسلا ةملبس) (cont’d) Dams in Lebanon (> 500) and Hasroun (>10)

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DAM SAFETY (دودسلا ةملبس) (cont’d) Inspections (مييقت) 1- Assess safety of dam (دسلا ةملبس مييقت) 2- Classify (فينصتدودسلا) 3- Review available data and reports ( ةعجارم تانايبلاريراقتلاو) 4- Visual inspections (مييقت) 5- Earth (seepage, cracks, vegetations, etc…) برست), قوقش)

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DAM SAFETY (دودسلا ةملبس) (cont’d)

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DAM SAFETY (دودسلا ةملبس) (cont’d) Why Dam Safety Important ( ةملبس اذاملدسلا)

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DAM SAFETY (دودسلا ةملبس) (cont’d)

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DESIGN and CONSTRUCTION (ءانبلا و ميمصت) Capacity of dam ( (عس ةدسلا

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Design and Construction (ءانبلا و ميمصت) (cont’d) Settlement 5% to 10% of height

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Design and Construction (ءانبلا و ميمصت) (cont’d)

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Design and Construction (ءانبلا و ميمصت) (cont’d)

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Collection of Bulk Samples During Site Visits.

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  • Sieve Analysis (Gradation Test)-ATSM D 6913-04
  • Atterberg Limits-ASTM D 4318-10
  • Standard Proctor Test- ASTM D 1586-11
  • Direct Shear Test-ASTM D 6528-07
  • Permeability Test-ASTM D 5084-03
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60.00 65.00 70.00 75.00 80.00 85.00 90.00 95.00 100.00 0.01 0.1 1 10 Percent Finer Grain size (mm)

The Data Obtained Will be Used in the Classification of the Soil

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36.80 37.00 37.20 37.40 37.60 37.80 38.00 38.20 38.40 38.60 38.80 13 18 23 28 33 Water Content (%) Number of Blows (N)

LL=37%

The Soil is Classified According to the USCS Classification as CL-Lean Clay

PL=18% PI=19%

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Maximum Dry Density(γdmax)=18.10 kN/m3 Optimum Water Content (OMC)=17.10%

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Sample at OMC=17.10% and γdmax=18.10kN/m3 Soil to Soil

Sample Preparation Sample Preparation

Sample Dimens nsions

  • ns

Depth 4.11 cm Diameter 6.33 cm

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0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 20.0 40.0 60.0 80.0 100.0 Shear Stress (kN/m2) Normal Stress (kN/m2)

Cohesion (c’S-S)=14 kPa Angle of Friction (Φ’S-S)=33˚

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  • Falling Head Test was Conducted
  • Average Effective Stress 2 psi
  • The Final Permeability Calculated:

3.7x10-5 m/day

Sample at OMC=17.10% and γdmax=18.10kN/m3

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Sample at OMC=17.10% and γdmax=18.10kN/m3 Sample Dimens nsions

  • ns

Height 10.22 cm Diameter 5.00 cm Weight of Wet Sample 847.80 g Weight of Dry Sample 743.70 g

Sample Preparation Triaxial Setup

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 Geotechnical Software  Based on Finite Elements Method  Provides 2-D and 3-D Models  Computes Deformations and Checks Stability of

Soil Structures

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Plaxis (جمانرب) (Cont’d)

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Design and Construction (ءانبلا و ميمصت) (cont’d)

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Design and Construction (ءانبلا و ميمصت) (cont’d) Compaction (طغضلا)

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Maintenance and Repair Work ( حلبصإو ةنايصلمعلا)(cont’d)

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Maintenance and Repair Work (لمعلا حلبصإو ةنايص) (cont’d)

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Maintenance and Repair Work (لمعلا حلبصإو ةنايص) (cont’d)

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Geophysical ( ةيئايزيفويج تاينقت لامعتسا)

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Geophysical ( ةيئايزيفويج تاينقت لامعتسا) (cont’d)

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Geophysical ( ةيئايزيفويج تاينقت لامعتسا) (cont’d)

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Geophysical ( ةيئايزيفويج تاينقت لامعتسا) (cont’d)

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Geophysical (دودسلا ةملبس) (cont’d)

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Open Access to Research Results

Website: www.earthdams.com Facebook account: https://www.facebook.com/ ndu.geolab Publications: 1.

  • ne conference paper

(under review)

  • 2. one journal article

(under preparation)

  • 3. two reports published
  • 4. four reports will be published
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Acknowledgements

1- USAID, NAS & NSF 2- Prof. Michael Mooney, Dept. of Civil & Environmental Eng’g, Colorado School of Mine (US – Partner) 3 – Hasroun Municipality, Mr. Gerard Semaani 4- Boutros El Hachem 5- Daccache Agriculture 6- Department of Civil and Environmental Engineering 7- Faculty of Engineering 8- Notre Dame University – Louaize 9- Mrs. Maalouf 10- Mr. Lahoud 11- Undergraduate Research Assistants

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www.earthdams.com https://www.facebook.com/ndu.geolab