Bored Pile Retaining Walls
We design and install both contiguous and secant pile walls using CFA, rotary bored and mini piling methods.
The design and choice of system and method is dependent on ground conditions, degree of water retention, retained height required and whether propping is possible in either short or long term conditions.
For secant walls we offer hard male and firm female interlocking piles and we install a scalloped guide wall to ensure the required interlocks are achieved.
Site Investigation Services
We have team up with Borehole Solutions Ltd to offer a wide range of site investigation services.
Engineering and reporting
If you need a site investigation carried out before you begin your job, we can help.
Driven Steel Tubular Piling
We drive thin walled steel tubes using internal drop hammer rigs or Grundomats.
Pile tubes are welded in sections and the internal hammer drives against a gravel plug at the base of the lead tube. Once the design length or installation set is achieved, the tube is filled with concrete and a reinforcement cage is placed.
Pile diameters range from 100 to 300mm depending on ground conditions and the specified pile loads. Since the rigs are small and compact this process is effectively another of our mini piling systems suitable for restricted access situations.
Alternatively where space permits, we can top drive thick walled steel tubes using larger hydraulic drop hammer rigs. The steel tubes are driven in sections and jointed, with only the top being filled with concrete to provide a connection into the pile cap.
Odex and Duplex Drilled Piling
Where piles are required to penetrate rock or hard material we can construct small diameter drilled piles using down - the - hole (DTH) rotary percussive hammers with compressed air as the flushing medium using either Odex or Duplex drilling systems. Piles are formed in grout and the pile casing can be either temporary or permanent depending on ground conditions and specification.
With our extensive knowledge of piling in areas with restricted access, we are able to offer a range of designed underpinning solutions to arrest movement in structures suffering from subsidence or to upgrade existing foundations where an increase in load bearing capacity is required. Where appropriate, structures that have subsided differentially may be jacked back to level.
We offer a comprehensive Ground Beam service providing clients with a bespoke in-situ ground beam cast on site and to the exact specifications required.
We operate this way as it reduces excavation needs and helps to minimise costs to both ourselves and our clients. It also helps reduce carbon emissions due to less waste being transferred to landfill.
We carry out integrity testing of piles as well as static and dynamic load testing, depending on project-specific requirements.