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1. MECHINERIES USE FOR PILE INSTALLATION NURUL HUDA BT MOHD JAMAL
AB03061
3. PILE HAMMERS
4. PILE HAMMER Factor should be taken by using this method is:
the size and the weight of the pile
the driving resistance which has to be overcome to achieve the design penetration
the available space and head room on the site
the availability of cranes
the noise restrictions
5. Pile driving methods (displacement piles) Categories of pile driving method:
Dropping weight
Explosion
Vibration
Jacking (restricted to micro-pilling)
Jetting
6. DROP HAMMERS A hammer with approximately the weight of the pile is raised a suitable height in a guide and released to strike the pile head.
2 types of drop hammers:
Single-acting steam or compressed-air hammers
Double-acting pile hammers
7. 1. Single-acting steam or compressed-air hammer comprise a massive weight in the form of a cylinder
admitted to the cylinder raises it up the fixed piston rod.
At the top of the stroke, which can be controlled by the operator, the steam is cut off and the cylinder falls freely on the pile helmet.
8. Eg:Pile driving using hammer Mechineries
9. 2. Double-acting pile hammers driven by steam or compressed air
back guides are bolted to the hammer to engage with leaders, and only short leg-guides are used to prevent the hammer from moving relatively to the top of the pile.
Double-acting hammers are used mainly for sheet pile driving.
10. DIESEL HAMMERS classified as single and double-acting
employs a ram which is raised by explosion at the base of a cylinder.
a vacuum is created in a separate annular chamber as the ram moves upward
almost doubling the output of the hammer over the single-acting type.
provide an efficient pile driving capacity, but not effective for all types of ground.
11. PILE DRIVING BY VIBRATING usually electrically powered @ hydraulically powered
consists of contra-rotating eccentric masses within a housing attaching to the pile head.
amplitude of the vibration is sufficient to break down the skin friction on the sides of the pile.
best suited to sandy or gravelly soil.
12. HYDRAULIC VIBRATORY HAMMER Require litter soil displacement
Involved reducing of ----?skin friction
----?an ingress of
water
13. Advantages using a hydraulic vibratory hammer The ground return to its original load bearing when the vibration stop
Much less resistance ( noise, surrounding ground movement)
Faster ringging and deringging onsite
Suitable for surface compasition and pile extraction
14. JETTING to aid the penetration of piles in to sand or sandy gravel, water jetting
very limited effect in firm to stiff clays or @ any soil containing much (coarse gravel, cobbles, or boulders).
15. BORING BY MECHANICAL AUGER
16. Boring by mechanical auger Types of boring by mechanical auger:
Continuous Flight Auger (CFA)
Underreaming
C.H.D.P
17. Continuous Flight Auger (CFA) An equipment comprises of a mobile base carrier fitted with a hollow-stemmed flight auger which is rotated into the ground to required depth of pilling.
To form the pile:
concrete is placed through the flight auger as it is withdrawn from the ground.
18. The auger is fitted with protective cap on the outlet at the base of the central tube
rotated into the ground by the top mounted rotary hydraulic motor which runs on a carrier attached to the mast.
On reaching the required depth, highly workable concrete is pumped through the hollow stem of the auger, and under the pressure of the concrete the protective cap is detached.
19. While rotating the auger in the same direction as during the boring stage, the spoil is expelled vertically as the auger is withdrawn and the pile is formed by filling with concrete.
The important things in the presses:
rotation of the auger
flow of concrete is matched that collapse of sides of the hole above concrete on lower flight of auger is avoided
20. Factor of successful installation the pile:
soft ground
enables to install a variety of bored piles of various diameters
Free of tree roots
Free of Cobbles
Free of boulders Factor of failure installation the pile:
the rotation of the auger is not matched
the advance of the auger is not matched
21. CFA Process
22. Under reaming A special feature of auger bored piles which is sometimes used to enable to exploit the bearing capacity of suitable strata by providing an enlarged base.
The types of soil:
has to be capable of standing open unsupported
Stiff and to hard clays, such as the London clay, are ideal.
23. the underreaming tool is fitted inside the straight section of a pile shaft
expanded at the bottom of the pile to produce the underream
after installation and before concrete is casted, a man carrying cage is lowered and the shaft and the underream of the pile is inspected.
24. hydraulic rotary drilling equipment b) C.F.A, c) undrreaming tool open position
25. C.H.D.P (Continuous Helical Displacement Piles ) a short, hollow tapered steel former complete with a larger diameter helical flange, the bullet head is fixed to a hallow drill pipe which is connected to a high torque rotary head running up and down the mast of a special rig.
A hollow cylindrical steel shaft sealed at the lower end by a one-way valve and fitted with triangular steel fins is pressed into the ground by a hydraulic ram.
There are no vibrations.
26. C.H.D.P.
27. SCREW PILING SPECIALISTS
28. Introduction Combines the old fashion principles of honesty and integrity with tomorrow’s technology
Continuing vision to build long-term
The Screw Piling division design, manufacturer, install and certify Screw Piles to suit a vast range of applications, from fence posts to heavy load bearing applications up to 130 tonnes.
29. Reliability The Screw Piling technique is a simple welded assembly
this technique is based on geo-technical expertise in soil engineering
the ability to design Screw Piles to suit many different soil conditions
the requirement exists for long-term structural integrity
30. Applications for Screw Piling Residential & Commercial buildings, Bridge abutments, Soil Stabilization
Pipeline supports, Signage towers & Light poles, Tension structures
Permanent & Temporary structures, Underpinning
Boardwalks, Beachfront structures.
31. Advantages of Screw Piling Ease of handling (lightweight), Rapid installation (few minutes per pile)
Minimal site preparation No excavation or soil removal, Unaffected by ground water
Compatible for connection to other building materials (Concrete/Timber)
Removable, Installation in sections in areas of limited headroom
Use as shallow tension ground anchors (structures subject to wind loads)
Compression members, No environmental damage, Vibration free installation
32. SCREW PILING SPECIALISTS
33. G-PILE SYSTEM
34. G-Pile System A grip jacking technique is the quiet technique
This system is low in noise, free of vibration and other pollution
suitable for use in urban, noise sensitive areas
It can install precast, steel or timber piles to unlimited depth
successfully applied in various types of soil, from soft and stiff clays, loose and dense sands, gravel to weathered rocks.
35. The G-Pile Model XZY 600T