• Micro/Mini Piles

    Micropiles are also known as minipiles, pin piles, needle piles, and root piles. The micropile casing generally has a diameter in the range of 3 to 10 inches. Typically, the casing is advanced to the design depth using a drilling technique. Reinforcing steel, typically an all-thread bar, is inserted into the micropile casing. High-strength cement grout is then pumped into the casing. The casing may extend to the full depth or end above the bond zone with the reinforcing bar extending to the full depth.

  • CFA Piling

    The Continuous Flight Auger (CFA) technique is one of the quietest piling solutions available and is virtually vibration free, making it ideal for working in close proximity to existing buildings, in residential or in environmentally sensitive areas. They can also be installed without the need for casing, bentonite or polymers in both cohesive material such as clay and weak rock and non-cohesive and water bearing soils such as sand, gravels and glacial tills. CFA Piles are produced by drilling into the ground with a hollow stemmed auger to the required depth or degree of resistance. As the ground is penetrated, the soil travels up the flight and once above ground level is removed by the automated auger cleaner. Concrete is then pumped through the rotary table to the toe of the pile and as the auger is withdrawn pressure is maintained so as to prevent voids being formed or the walls of the pile collapsing in. Steel reinforcement is then inserted into the concrete pile to the required depth.

  • SFA Piling

    Sectional Flight Auger (SFA) technology is used in low head room or very restricted job sites, where a CFA rig cannot reach. The piles are formed with the use of sectional lengths of hollow stem continuous flight auger.

  • Soil Nailing/Slope Stabilisation

    Soil nailing is a construction technique that can be used as a remedial measure to treat unstable natural soil slopes or as a construction technique that allows the safe over-steepening of new or existing soil slopes. The technique involves the insertion of relatively slender reinforcing elements into the slope – often general purpose reinforcing bars (rebar) although proprietary solid or hollow-system bars are also available. Solid bars are usually installed into pre-drilled holes and then grouted into place using a separate grout line, whereas hollow bars may be drilled and grouted simultaneously by the use of a sacrificial drill bit and by pumping grout down the hollow bar as drilling progresses. Kinetic methods of firing relatively short bars into soil slopes have also been developed. Bars installed using drilling techniques are usually fully grouted and installed at a slight downward inclination with bars installed at regularly spaced points across the slope face.

  • Removable Anchors

    Removable anchors are a temporary removable pre-stressed strand anchor that can be removed out of the ground cleanly, quickly and simply once its use and application becomes redundant. The use of conventional temporary anchors can be an obstruction to adjacent future basement excavations and usually require third party approval, which may be difficult to obtain as they remain permanently in the ground.

  • Platipus Anchors

    Platipus anchors are a unique, modern and versatile device that can be rapidly deployed in most displaceable ground conditions. It offers a lightweight corrosion resistant anchor that can be driven from ground level using conventional portable equipment. It creates minimal disturbance of the soil during installation, can be stressed to an exact holding capacity and made fully operational immediately. As a completely dry system it also has minimal environmental impact.

  • Sheet piles

    Sheet piles are installed in sequence to design depth along the planned excavation perimeter or seawall alignment. The interlocked sheet piles form a wall for permanent or temporary lateral earth support with reduced groundwater inflow. Anchors can be included to provide additional lateral support, if required. Sheet pile walls have been used to support excavations for below-grade parking structures, basements, pump houses, and foundations, to construct cofferdams, and to construct seawalls and bulkheads. Permanent steel sheet piles are designed to provide a long service life. Vibratory hammers are typically used to install sheet piles. If soils are too hard or dense, an impact hammer can be used to complete the installation. At certain sites where vibrations are a concern, the sheets can be hydraulically pushed into the ground.

  • Screw / Helical piles

    Helical Piles are steel shafts with a series of low-pitched circular steel helical plates welded at strategic positions along the shaft. The plates give the foundation both tension and compression bearing capacity which enables them to be used for a wide range of applications across many industries and sectors. The piles can be connected in groups using a steel load transfer grillage and are screwed directly into the ground by machine-mounted hydraulic or electrically powered drilling equipment. Helical Piles make the use of concrete for foundations a thing of the past. Helical Piles are relatively inexpensive because they are very quick to install. They are specifically designed to suit the ground conditions and the application requirements and come in various lengths and thicknesses. The helical pile is a versatile, environmentally friendly and cost-effective technology with many uses across civil engineering industries such as buildings, transport and communications.

  • Bottom driven steel tube piles

    Bottom Driven Minipiles are formed by driving a crimped closed end, sacrificial thin wall steel casing into the ground using an internal drop hammer. The internal drop hammer drives onto a dry concrete plug/packer at the toe of the casing and additional casings sections are added as the pile is advanced. These casings are joined using full filleted welds. When the casing has been advanced to its predetermined design length or more commonly design set, the steel reinforcement is placed and the pile bore is filled with either concrete or grout. As this is a displacement technique, no spoil is produced making it particularly attractive on brown field sites.

  • Grundomat piles

    Uses 105mm to 150mm diameter piles. This Steel Cased Pile is driven internally with a Grundomat, which is powered by compressed air. These are usually used in restricted access sites where the load bearing is light. Once the compressor is started up, the air tap is gradually opened to allow the hammer action of the Grundomat to drive the casing. Once the casing is firm and aligned, the tap is opened for maximum drive, where then it is driven to approximately 300mm above ground level. The next length of casing is the then welded to this ‘starter’ via a spigot and socket joint. More are added as required until the required resistance and depth is achieved. Steel Cased Grundomat Driven Piles also offer minimal vibration and so are often used for extensions and conservatories in residential areas, as they cause very little disruption.

  • King Post walls

    King Post Walls, also known as Soldier Piles, and Berlin Walls may be used in many different retention applications, and different ground conditions. The installation method comprises of boring a hole with either a CFA or Rotary Rig, concreting the pile and then installing the H Beam ( UC ). The web of the H beam can have pre-stressed concrete panels or timber sleepers inserted between them. Once excavated or back filled against you are left with an embedded retaining wall, used in many applications, including bank stabilisation, flood defences and basements.

  • Secant/Contiguous piled walls

    Secant pile walls are formed by constructing intersecting reinforced concrete piles. The secant piles are reinforced with either steel rebar or with steel beams and are constructed by either drilling under mud or augering. Primary piles are installed first with secondary piles constructed in between primary piles once the latter gain sufficient strength. Pile overlap is typically in the order of 3 inches (8 cm). In a tangent pile wall, there is no pile overlap as the piles are constructed flush to each other. A secant pile wall is a stiff wall structure with high resistance against horizontal earth pressure and water pressure. The horizontal wall deflections are small. It is – correctly executed – a water bearing structure which is almost impermeable.

  • DTHH (Down The Hole Hammer) Drilled Piles

    A rotary percussive hammer is used for drilling in various ground conditions including boulders and far into rock. These piles can act as both friction and end bearing piles, but will generally be end bearing. Such drilled holes can either be temporarily cased or permanently cased. DTH drilled piles are generally used where the pile are in tension rather than compression.


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