Tuesday, November 27, 2012


According to the method of construction, there are three types of piles. They are

1. Driven piles,   Piles may be of timber, steel or concrete. When the piles are of concrete, they are to be precast. They may be driven either vertically or at an angle to the vertical. Piles are driven using a pile hammer. When a pile is driven into granular soil, the soil so displaced, equal to the volume of the driven pile, compacts the soil around the sides since the displaced soil particles enter the soil spaces of the adjacent mass which leads to densification of the mass. The pile that compacts the soil adjacent....(more)

2. Cast-in-situ piles  Cast-in-situ piles are concrete piles. These piles are distinguished from drilled piers as smalldiameter piles. They are constructed by making holes in the ground to the required depth and thenfilling the hole with concrete. Straight bored piles or piles with one or more bulbs at intervals maybe cast at the site. The latter type are called under-reamed piles. Reinforcement may be used as perthe requirements. Cast-in-situ piles have advantages as well as disadvantages. Advantages1. Piles of any....(more)

3. Driven and cast-in-situ piles.   This type has the advantages and disadvantages of both the driven and the cast-in-situ piles. The procedure of installing a driven and cast-in-situ pile is as follows: A steel shell is driven into the ground with the aid of a mandrel inserted into the shell. The mandrel is withdrawn and concrete is placed in the shell. The shell is made of corrugated and reinforced thin sheet steel (mono-tube piles) or pipes (Armco welded pipes or common seamless pipes). The piles of this type are called a shell....(more)

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