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

دودسلاةيبارتلا Earth Dams Naji Khoury, Ph.D., P.E. Assistant Professor, NDU - Louaize January 22, 2015

Presentation Outline Dam Safety دودسلا ةملبس - - Design and Construction of Sustainable Earth Dams ءانبةمادتسم ةيبارت دودس - Inspection and Maintenance of Earth Dams ةبقارم ةنايصودودسلا لامعتسا تاينقتةيئايزيفويج - Geophysical Techniques

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

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

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

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 )

DAM SAFETY ( دودسلا ةملبس ) (cont ’ d)

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

DAM SAFETY ( دودسلا ةملبس ) (cont ’ d)

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

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

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

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

Collection of Bulk Samples During Site Visits.

• 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

100.00 95.00 90.00 85.00 Percent Finer 80.00 75.00 70.00 65.00 60.00 10 1 0.1 0.01 Grain size (mm) The Data Obtained Will be Used in the Classification of the Soil

38.80 38.60 38.40 38.20 Water Content (%) LL=37% 38.00 37.80 37.60 37.40 37.20 37.00 36.80 13 18 23 28 33 Number of Blows (N) PL=18% PI=19% The Soil is Classified According to the USCS Classification as CL-Lean Clay

Maximum Dry Density( γ d max )=18.10 kN/m 3 Optimum Water Content (OMC)=17.10%

Sample Dimens nsions ons Depth 4.11 cm Diameter 6.33 cm Soil to Soil Sample Preparation Sample Preparation Sample at OMC=17.10% and γ d max =18.10kN/m 3

90.0 80.0 70.0 Shear Stress (kN/m2) 60.0 50.0 40.0 30.0 20.0 10.0 0.0 20.0 40.0 60.0 80.0 100.0 Normal Stress (kN/m2) Cohesion (c ’ S-S )=14 kPa Angle of Friction ( Φ’ S-S )=33 ˚

• 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 γ d max =18.10kN/m 3

Sample Dimens nsions ons Height 10.22 cm Diameter 5.00 cm Weight of 847.80 g Wet Sample Weight of 743.70 g Dry Sample Sample Preparation Triaxial Setup Sample at OMC=17.10% and γ d max =18.10kN/m 3

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

Plaxis ( جمانرب ) (Cont ’ d)

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

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

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

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

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

Geophysical ( ةيئايزيفويج تاينقت لامعتسا )

Geophysical ( ةيئايزيفويج تاينقت لامعتسا ) (cont ’ d)

Geophysical ( ةيئايزيفويج تاينقت لامعتسا ) (cont ’ d)

Geophysical ( ةيئايزيفويج تاينقت لامعتسا ) (cont ’ d)

Geophysical ( دودسلا ةملبس ) (cont ’ d)

Open Access to Research Results Website: www.earthdams.com Facebook account: https://www.facebook.com/ ndu.geolab Publications: 1. one conference paper (under review) 2. one journal article (under preparation) 3. two reports published 4. four reports will be published

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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