CCS has the technology to undertake JET PILING, MICROPILING, DEEP SOIL MIXING, SEISMIC STRENGTHENING & PILE TESTING.
Injection piling technology can be applied in a number of situations. CCS has access to a range of installation equipment, which allows installation on open ground, in confined spaces and on steep slopes, including:
- New and Existing Foundation Projects
- Earthquake Strengthening / Earthquake Repairs
- Seismic Strengthening
- Slope Stabilisation
- Ground Anchors
- Soil Nails
Injection Pile key features include:
- Hollow threaded bar to allow continuous high pressure pumping of grout.
- Coupling nuts to connect pieces of hollow bar together.
- Sacrificial drill bit with nozzles designed specifically for New Zealand ground conditions to control grout body size.
- Washer plate and reinforcing coil affixed to steel bar with spherical collar nuts to transfer loads from pile cap into the pile.
- Grout body that penetrates the different soil strata to give a very strong bond with the ground.
The size of the drill head, steel bar, and washer plates used depends on design, application, and local ground conditions. Grout body size can be controlled using different drill heads and nozzles to vary the grout injection pressure. Because the bars are continuously threaded, lengths can easily be shortened and coupled together to allow operation in low head room applications.
Components of a typical injection pile
INJECTION PILING INSTALLATION SYSTEMS
System Overview
The diagram to the right shows a basic representation of the system used to install continuous pressure injection piles. The system uses specialised modules connected by hoses in order to create a compact and flexible system able to adapt to a large range of applications.
The system consists of a diesel powered hydraulic power pack which supplies hydraulic power to an injection unit, which mixes and pumps grout, and a drilling unit, which uses rotary-percussion drilling to install the injection piles. Highly pressurised grout is continuously supplied to the drilling rig allowing continuous grout injection down the hollow steel bar and through the drill head nozzle.
Our utilisation of Morath’s specialised equipment can solve your ground and foundation problems.
CCS Provides:
- Fast installation
- Compact equipment allowing for confined working space and limited, non-intrusive solutions
- Equipment that is flexible in its application and can be adapted specifically to meet the needs of each individual project
- A large range of machine and consumables sizes suitable for complete range of projects
- Specialised drilling consumables that allow installation through floors, walls, and other obstructions
- Separate hydraulic power packs to enable compact drilling and injection into very confined areas
- Fully hydraulic powered operation which gives a huge production advantage over standard pneumatic drilling systems
RESTRICTED ACCESS
Our injection piling system allows easy access to confined areas such as low headroom basements and beneath bridges. The machines are also capable of operating very near, and drilling through, existing walls and structures. Additionally, because the system is made up of different modules, hydraulic power packs and injection units can be set up away from the drilling area allowing for safe and easy operation outside of the confined spaces. In confined basements where a drilling crawler can not enter, smaller hand-carried drilling rigs allow easy access. The basement operation system allows injection piles to be drilled through reinforced concrete floors to stabilise existing foundations and provide a jacking point to level buildings.
Underpinning of buildings is made possible by being able to operate very near existing walls and structures without causing significant ground vibrations that could damage those structures. This process can be used to stabilise existing foundations as well as provide foundations for retrofitted shear walls and K-bracing to help stabilise the structure itself.
MINE & TUNNEL STABILISATION
BACK ANCHORAGE
EMBANKMENT STABILISATION
VIEW PROJECTS
Check out our work on previous projects the team at CCS has undertaken to save buildings, many of them that our competitors had previously deemed to be write-offs.
PILE TESTING
CCS has completed pile testing sites in Christchurch, Wellington and Dunedin to date. Pile testing is completed to confirm the design and load required of the piles to be installed. To complete the pile testing we have been engaged to complete installation of a number of test piles to be tested at different tension and compression loads.