PJ Piling - Piling
 It is well known that any building, house or concrete structure to be built well, it must have a very strong foundation and underground structural base that supports the building. This is what makes piling so important.
What is Piling?
Piling is a technique used to set a deep foundation for buildings. By driving and embedding piles of concrete or steel into the deep soil of the ground, we are able to provide a strong support to the building structure at the foundation .Factors such as the size, capacity & scope of the project, the condition of the soil immediately beneath the ground, and space required for rigging, all need to be taken into consideration before beginning the piling process. As opposed to a shallow foundation, a deep foundation is used to transfer the load of the structure to the deeper, stronger layer of the soil which has a high bearing capacity and can take the load, thus supporting the structure well.
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Ground Investigation
• Cable percussion boring
• Rotary core drilling
• Trial Pits
• Walkover Surveys
Geotechnical Reports and Consultancy Service
• Pile and Retaining wall design
• contiguous and secant bored piled walls and sheet piles
Lab Testing
Disturbed and Undisturbed samples taken at time of boring can be tested for various parameters dependent on the client or engineers instructions.
• Triaxial Tests
• CBR Tests
• Compaction
• PH and Sulphate
On Site Testing
• Standard Penetration Testing (SPT)
• Cone Penetration Testing (CPT)
• Piezometer installation for groundwater monitoring.
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Test Piles:
If you are unsure of your soil or ground conditions, we can mobilize and drive two test piles that would give you a better idea of the bed rock on the site is. Please call for a free quotation.
Driven Piles:
This technique makes use of a Pile Driver which is used to drive in prefabricated piles into the ground. Most Driven piles are made of concrete, or steel & the driving technique leads to soil displacement.
Drilled Piles:
Drilled piles are extensive boring techniques to drill into hard earth.
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What type of piles to use?
· Concrete Piles: suitable for Greenfield areas for heaving load bearing piles
· Steel Piles: suitable for Greenfield areas with boulders and other sub-terrain obstacles. Also used for floating jetty’s.
· Bottom driven piles: Also known as mini-piles. Suitable for house extensions, limited access, noise sensitive areas and no vibrations.
· Limited access – Access to both confined areas and inside dwelling and building structures down to 71cm wide. This comes into play with existing houses/structures where the front door is the only means of primary access for job competition. To view limited access piling in operation, check it out on youtube by clicking here.
· NEW Sheet piling: We recently purchased a Bruce 40 Sheet Piling Hammer. Suitable for all types of sheet piling, h-beams and steel pipes for retaining walls, cofferdams, bulkheads and structures to hold back subscidence. Suitable for driving and extracting all types of sheet piles in awkward areas such as:
- Riverbanks & unstable ground
- Hillside or steep slope
- Restricted headroom i.e. tunnels, powerlines
· Vibration monitoring – This is necessary for confined areas before contracts are started where there is doubt about potential vibration or structural damage to existing or surrounding properties.
· Auger Piles: Suitable for drilling through rough and sub-terrain formed objects (bolder, shale, rock) that requires initial drilling to be addressed before softer terrain with drilling techniques can be used.
Once the required depth is reached the auger string is withdrawn and is lined with a 4mm wall steel casing. It then is filled with concrete and a 4-bar re-inforcement cage is inserted
Advantages
- Suitable for limited access
- Low noise and low vibration
- 2 meter head room
- Suitable for soil nailing
- Suitable for screw piles for tension loads
- Small lightweight equipment
- Suitable for forming piled retaining walls
- Minimal site preparation
- Suitable for up to 500mm auger x 20m deep
H-Piles: Suitable for heavy foundations where the load bearing weight is transferred to the earth-shore deep down
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