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retaining walls (ppt)
This document discusses different types of retaining walls, including gravity, cantilevered, counter fort, precast concrete, and sheet pile walls. It describes factors that influence retaining wall design such as soil type, water table height, and subsurface water movement. The key forces that act on retaining walls are also examined: pressure at rest, active earth pressure, and passive earth pressure. Finally, five common modes of retaining wall failure are identified: sliding, overturning, bearing capacity, shallow shear, and deep shear failures.
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retaining walls (ppt)
- 1. الرحيم الرحمن هللابسم Retaining Wall المجموعة أعضاء:- عطاونة ماهر قباجة السالم عبد االسطة حسين اشرف:-د.الجوالني نبيل
- 2. Definition of retainingwall Retaining Wall Angle of repose
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- 4. Typical dimensions ofdifferent types of retaining walls
- 5. -:Type of Retainingwall Gravity retaining wall Cantilevered retaining wall Counter fort retaining wall Precast concrete retaining wall Precast concrete crib retaining wall Sheet pile wall
- 6. • Gravity retainingwalls
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- 8. • Counter fortretaining wall
- 9. Bolt down Cast in Heavyduty Freestanding
- 10. Cast in Boltdown
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- 12. •Precast concrete cribretaining wall
- 13. • Sheet pilewall
- 14. -:Drainage system ofretaining walls
- 15. Factors and considerationsin the- :design ofretaining walls • Nature & type of soil • Height of water table • Subsoil water movements • Type of wall • Material used in the construction of the wall
- 16. Forces acting ona retaining wall :- Pressure at rest Active earth pressure Passive earth pressure
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- 20. diagrams of forcesacting on a retaining wall
- 22. There is fiveModes of failure Sliding Failure Overturning Failure Bearing capacity Failure Shallow shear Failure Deep shear Failure
- 23. Sliding Failure Sliding failureis nothing but sliding of wall away from backfill when there is shearing failure at the base ofwall The Factor of safety against sliding is:- ROf resultantVertical & horizontal components-:RV&RH of weight of wall & earth pressure µ = coefficient of friction = tan δ
- 24. Overturning failure Overturning failureis rotation of wall about its toe due to exceeding of moment caused due to overturning forces to resisting forces -:The Factor of safety against overturning is given by = sum of resisting moment about toe = sum of overturning moment about toe
- 25. Bearing capacity failure:- The pressure exerted by resultant vertical force at toe of wall must not exceed the allowable bearing capacity of the soil , the pressure distribution is assumed to be linear The maximum pressure is given by : :The Factor of safety against bearing failure is
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- 28. case study Retaining wallfailure in Austria on 30th October 2012
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