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An- Najah National University Faculty of Engineering Civil Engineering Department.
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An-Najah National University Faculty of Engineering Civil Engineering Department. {Graduation Project} By: Adie Qashoua Yazan Zubaida Amer Qawariq Supervisor: Ph.D. Isam Jardaneh 2011
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An- Najah National University Faculty of Engineering Civil Engineering Department. {Graduation Project} By: Adie Qashoua Yazan Zubaida Amer Qawariq Supervisor: Ph.D. Isam Jardaneh 2011. “Soil Reinforcement” Mechanically Stabilized Retaining Wall . Project Outline. - PowerPoint PPT Presentation
Transcript of An- Najah National University Faculty of Engineering Civil Engineering Department.
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An-Najah National UniversityFaculty of EngineeringCivil Engineering Department.
{Graduation Project}
By:Adie QashouaYazan ZubaidaAmer Qawariq
Supervisor:Ph.D. Isam Jardaneh
2011
Soil Reinforcement Mechanically Stabilized Retaining Wall
Project OutlineCHAPTER 1 IntroductionCHAPTER 2 Literature Review of Soil ReinforcementCHAPTER 3 Mechanically Stabilized Retaining WallCHAPTER 4 Design of Conventional Retaining WallCHAPTER 5 Design of Mechanically Stabilized Retaining Wall.CHAPTER 6 Quantities and Cost ComparisonGeneral View
Reinforced earth is an expression used by specialized soil reinforcement companies that refers to the combination of geotechnical and structural engineering principles. History of Soil Reinforcement
Modern Structures The modern concept of the soil reinforcement and soil structure was proposed by Casagrande. The modern form of earth reinforcement was introduced by Vidal in the 1960s. Vidals concept
Application of
Soil
Reinforcement There are many applications of soil reinforcement such as :
Bridge abutments. Bridge abutments with piled bankseat. Sloping bridge abutments. Embankments. Dams.
Bridge abutment
Bridge Abutment with Piled Bankseat
Sloping Bridge Abutment
Embankment
Dam
Advantages andDisadvantagesofSoil ReinforcementAdvantages of Soil Reinforcement1. Allow in-situ strengthening on existing slope surface.2. Allow excellent working space in front of the excavation face.3. Avoid unnecessary temporary works.4. Only requires light machinery and equipment.
Disadvantages of Soil Reinforcement1. Less suitable for course grained soil and soft clayey soil.2. Suitable only for excavation above groundwater.Mechanically Stabilized Retaining WallGeneral DefinitionIt is a new Geotechnical technology that uses reinforcement materials to reinforce the backfill of retaining walls.Construction ComponentsMetallic Facing System. reinforcement.Facing Connection.Backfill Materials.
Facing System
Metallic reinforcement
Facing Connection
Backfill Materials
Designof Mechanically Stabilized Retaining wallDimensions and Soil Properties
Internal and External StabilityInternal StabilityExternal StabilityHorizontal Spacing1 mFS (Siding)3.57Vertical Spacing0.5 mFS (Overturning)27.3Maximum Tie Force24.33 KNFS (Bearing Capacity)5.83Thickness of Tie ( t )6 mmLength of Tie (L)13 mConventionalRetainingWallsDefinitionConventional retaining walls are classified as the earliest supporting systems used at excavation sites, soil slopes, highway beds and bridge abutments.Types of Conventional Retaining Walls
Designof Conventional Retaining WallExternal Stability Check
Internal Stability(Steel Distribution)
Quantities and Cost ComparisonConventional Retaining WallMechanically Stabilized Retaining WallQuantityCostQuantityCostSteel0.56 ton1792 NIS0.639 Ton2045 NISConcrete/FacingConcrete1796 NISNo. of Facing700 NIS6.1 Cm14Backfill18.2 Cm145.6 NISBackfill material is used from the siteTotal Cost3707 NIS2745 NISThank You ForYour Listening
