PILE DRIVING EQUIPMENT

By-Abira RatherM.Tech 2nd semNit Srinagar

What is a pile driver?

Mechanical device Used to drive piles into the soil to provide foundation support to buildings

Basic construction Pile driver includes a heavy weight placed between guides It is able to freely slide up and down in a single line. It is placed above a pile. The weight is raised, which may involve the use of hydraulics, steam or diesel or manual

labour. When the weight reaches its highest point it is then released and smashes on to the pile

in order to drive it into the ground.

Types Using pulleys...ancient method Diesel hammer....a two stroke diesel engine where piston acts as weight Vertical travel lead systems....VTL Hydraulic press in.....speciality equipment uses hydraulic rams to press piles

into the ground.....preferred when vibration is a concern Vibratory pile driver/extractor. ....has a system of counter rotating eccentric

weights powered by hydraulic motors and designed in such a way that horizontal vibrations cancel out while vertical vibrations are transmitted into the pile

Pilling rigs....a construction machine for pilling...used to drill in sandy soil, clay, silty clay

Pulleys Ancient method Weights lifted by manual or animal

labour pulleys

Roman pile driver (replica) used at the construction of Caesar's Rhine bridges (55 BC)

Diesel Hammer A very large two stroke diesel engine

Piston acts as a weight and cylinder connects

Piston is raised by auxiliary means, diesel injected into cylinder, weight is dropped by means of a quick release, the mixture compresses heating to ignition point of diesel fuel.

The mixture ignites transferring energy to pile and driving the weight back up

VERTICAL TRAVEL LEAD SYSTEMo Developed in response to the fundamental limitations of either a fixed lead or swinging

lead system.

o The fixed lead system is well suited to level job sites with few obstructions and has the advantage of faster positioning of the lead.

o The hanging lead is very adaptable to different elevations and batter piles but takes much

longer to position.

o The Vertical Travel Lead was developed to combine the fast and accurate positioning of fixed leads, with the ability to adjust the height of the lead base up or down.

o The VTL is connected to the boom by a sliding connection, which allows the lead to be elevated or lowered below grade

Vertical travel lead system

1.Specialty equipment which installs piles using hydraulic rams to press piles into the ground.

2. Preferred where vibration is a concern.

3. There are press attachments that can adapt to conventional pile driving rigs to press 2 pairs of sheet piles at a time.

4. Additional types of press equipment sit on top of existing sheet piles and grip onto previously driven piles.

5. Allows for greater press-in and extraction force to be used since more reaction force is developed.

6. The reaction based machines operate at only 69dB at 23 ft allowing for installation and extraction of piles.

Hydraulic press-in

HYDRUALIC PRESS-IN

VIBRATORY PILE DRIVERS

Designed in such a way that horizontal vibrations cancel out, while vertical vibrations are transmitted into the pile.

The pile driving machine is lifted and positioned over the pile by means of an excavator or crane

Vibratory hammers can either drive in or extract a pile

Hydraulic fluid is typically supplied to the driver by a diesel engine powered pump mounted in a trailer or van and connected to the driver head through a set of long hoses.

Hammers are available with several different vibration rates, ranging from about 1200 vibrations per minute to about 2400 VPM

PILLING RIG Piling rig is A construction machine for piling in foundation engineering.

Mainly applied to drill in sandy soil, clay, silty clay, etc.

Widely used cast-in-place piles, diaphragm walls, foundation reinforcement and other foundation projects.

Power of engine is around 108–450 KW

Output torque 60–400 KN-m

Maximum pile diameter 1.5–4 m

Maximum pile depth 60–90 m.

THANK YOU!!