Advantages and disadvantages of different piles; concrete piles
(concrete piles)

1.Wood piles & concrete pile

2. Prefabricated concrete pile (reinforced) and prestressed concrete pile. (driven) affected by groundwater conditions.

3. Driven and cast-in-place concrete pile Permanently cased (casing left in the ground) Temporarily cased or uncased (casing retrieved).

4.Bored and cast in -place (non -displacement piles)

5.Steel piles (Rolled steel section)

1. Wood piles:[Advantages and disadvantages of different piles]

Advantages and disadvantages of different piles; concrete piles
woodpile
  •  The piles are easy to handle.
  •   Relatively inexpensive where timber is plentiful. 
  • The Sections were joined together and excess length easily removed from the piles. 

The piles will rot above the groundwater level. Have a limited bearing capacity.

  •  That was Can easily be damaged during on driving by stones and boulders. 
  •  The piles are difficult to splice and are attacked by marine borers in saltwater.

 

 

 

2. Prefabricated concrete piles (reinforced) and prestressed concrete pile. (driven) affected by the groundwater conditions

 

Advantages and disadvantages of different piles; concrete piles
concrete pile
  •  Do not corrode or rot.

    The concrete piles Are easy to splice. Relatively inexpensive. 

  • The quality of the concrete is can be checked before driving the concrete pile. 
  • This type is Stable in squeezing ground, for example, soft clays, silts, and peats pile material can be inspected before the piling. 
  • Construction procedure was unaffected by groundwater. for the concrete pile.
  • Relatively difficult to cut. 
  • Can be damaged during driving. Replacement piles may be required. 
  • Sometimes problems with noise and vibration in a concrete pile. 
  • Cannot be driven with very large diameters or in the condition of limited headroom.

 

 

 




3. Driven and cast-in-place concrete pile Permanently cased (casing left in the ground) Temporarily cased or uncased (casing retrieved):

  • Can be inspected before the casting can easily be cut or extended to the required length.
  •  Relatively inexpensive. 
  • the concrete pile is Low noise level. 
  • The concrete pile can be cast before excavation.
  •  Pile lengths are readily adjustable. 
  •  An enlarged base can be formed which can raise the relative density of a granular founding stratum leading to much higher-end bearing capacity. 
  •  The Reinforcement is not described by the effects of handling or driving the stresses. 
  • Can drive with closed-end so excluding the effects of GW.
  •  The heave of the neighboring ground surface, which could lead to reconsolidation and the development of negative skin friction forces on piles. 
  •  The concrete pile’s Displacement of nearby retaining walls. Lifting of previously operate piles, where the penetration at the toe has been sufficient to resist upward movements. 
  •  Tensile strength of damage to unreinforced piles or piles consisting of the green concrete, where forces at the toe have been sufficient to resist upward movements. 
  •  The Light steel section or Precast concrete shell be damaged or distorted by hard driving. 
  • Cannot be driven where the headroom is limited. 
  •  Relatively expensive. 
  •  Time-consuming. Cannot be used immediately after the installation. 
  • Limited length.




4.Bored and cast in -place (non -displacement piles): 
  • The Length can be readily varied to suit various ground conditions in a concrete pile.
  •  Can be installed in very large diameters. 
  •  End enlargement up to two or three diameters is possible in clays. 
  •  The material of piles is not dependent on handling or driving conditions.
  •  Can be installed in very long lengths. 
  •  Can be installed without appreciable noise or vibrations.
  •   Can be installed in conditions of very low headroom. 
  •  No risk of ground heave. Susceptible to “waisting” or “necking” in squeezing ground in a concrete pile.
  •  Concrete is not placed under ideal conditions and cannot be subsequently inspected.
  • The  Water under artesian pressure may pipe up and pile shaft washing out cement.
  •  The Enlarged ends can not be formed in cohesionless materials without special techniques.
  •  Cannot be readily extended above ground level especially in the river and marine structures. 
  •  The Boring methods may loosen sandy or gravely soils and requiring base grouting to achieve economical base resistance.
  •  Sinking piles may cause loss of ground I cohesion-less leading to the settlement of adjacent structures.
5. Steel piles (Rolled steel section) :
  • The piles are easy to handle and can easily be cut to the concrete pile’ desired length.
  •  Can be driven through dense layers. The lateral displacement of the soil during driving is low (steel section is H piles and I section piles) can be relatively easily spliced or bolted. 
  •  Can be driven hard and in very long lengths.
  •  Can carry heavy loads. 
  •  Can be successfully anchored in sloping rock. 
  •  Sometimes the Small displacement piles particularly useful if ground displacements and disturbance critical. 
  • The piles will corrode, 
  • Will deviate relatively easy during driving.
  •  Are relatively expensive. 
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