Techniques
Continuous Flight Auger
Installation process CFA piles are formed by drilling a continuous flight auger into the ground. The sides of the hole are supported at all times by the soil-filled auger, eliminating the need for temporary casing or bentonite slurry. Upon reaching the required depth,…
read moreSecant Bored Pile Retaining Walls
This system involves constructing interlocking bored piles to form a continuous concrete piled wall suitable for water bearing ground conditions. The un-reinforced primary piles are constructed first, often using Continuous Flight Auger techniques. These piles are…
read moreSoil nailing
Soil nailing has become very popular over the past two decades especially in embankment stabilisation works associated with motorway widening and railway embankment stabilisation. It is especially useful for sites with difficult access as the drilling and grouting…
read moreRotary Bored Piling
Rotary bored piles differ from CFA piles in that a temporary casing is installed to support the bore from collapse in unstable ground conditions, for example in superficial soils. Where casing lengths are short they can be inserted as a single plain length. Where…
read moreRestricted Access Mini Piling
For difficult access or low headroom sites small purpose built piling rigs can be employed. They use either rotary or continuous flight auger techniques to suit the prevailing ground conditions. Using such methods mini piles can be drilled in diameters from 200mm to…
read moreContiguous Bored Pile Retaining Walls
This system involves constructing discrete piles in a line to form a retaining wall. The piles are typically spaced out with their centres 150mm greater than their diameter; for example, 600mm diameter piles at 750mm centres. They are drilled with diameters between…
read moreKing Post Piling
King post piling is an economical solution for small and medium retained retention systems. The piles are drilled by either rotary or continuous flight auger methods, and a structural steel section introduced either before or after concreting. Infill panels are then…
read moreGrouting
Since its first use over 150 years ago, the practice of injecting cementitious grout into voids in stonework or soil has developed into a technique with many wide uses. In civil engineering today this technique is used to… Strengthen defective structural masonry and…
read moreGround Anchors
This process has developed considerably in recent years, especially with the advent of hollow stem self-drilling type systems. Using this drilling technique, the hollow drill rods are drilled into the soil or rock using grout as a flushing medium and then left in-situ…
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