Techniques

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, concrete is pumped down the hollow stem as the auger is steadily […]

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 drilled on a hit and miss basis to avoid damage to recently cast piles. The secondary piles are then

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 equipment is typically compact and light. Soil nailing rigs can be purpose built or attachments mounted on

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 longer lengths are required they can be inserted in segmental lengths

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 450mm and to depths of up to 20.0 metres. The power pack

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 600mm and 1200mm and depths up to 30.0 metres. Contiguous piles are installed

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 placed between the steel sections to complete the soil retention system. They can be

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 arch bridges Consolidate or reduce water seepage through a mass of rock

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 to form the anchor tendon. This system has made the installation process