ReFORCE Permeation Piling

ReFORCE Permeation Piling comprises columns of solidified soil augmented by a structural steel tube (ReFORCE Lance) also used as the grout delivery system. They are usually installed through small aperture drilled through the foundation to provide support directly under the part of the structure to be supported. Typically, a ReFORCE Pile is 0.5m in diameter and will have a capacity of between 100kN and 500kN. Pile capacities are calculated in accordance with accepted soil mechanics expressions.

Technical advantages

  • High strength: The piles comprise typically 0.5m diameter and appropriate length by a combination of the cured resin and the ground. Strength is obtained, primarily by virtue of sheer size. Considerable end bearing capacity is obtainable.
  • Reliability: With over ten years of ReFORCE pile applications to domestic and commercial properties, no failure has ever occurred.
  • High level of redundancy in design: ReFORCE Permeation Piling is normally designed with a factor of safety of 3 x and minimum characteristic dimensions allowed for. This takes into account natural variability in the soil column. The use of a structural steel core further enhances the reliability of the pile.
  • Large end and under foundation bearings: Due to their size, ReFORCE Piles are formed under the foundations of structures; this reduces or eliminates eccentricity of support. Such enhanced support is less problematical with brick foundations and weak superstructures because the support is well spread. Large end bearing surfaces of ReFORCE piles provide better capacity in weaker soils.
  • Continuity of strength throughout full length: The bond between the permeation grouted column and structural steel injection tube is exceptionally high, strong enough, in fact, to allow forces to be carried throughout the length of the pile, even when it is interrupted by inclusions of impermeable soil.
  • Rapid installation: Most of the smaller contracts can be completed within one or two days.
  • Minimal disruption: The majority of projects can be carried out with the client in the property.
  • Control over shape of pile to enhance performance: The resin formulation and the chambered design of the ReFORCE Lances work in conjunction to allow a high degree of control over the profile of ReFORCE Piles.
  • Cost effective: ReFORCE Piles compete against all other systems in the insured marketplace and are regarded as exceptionally cost effective and competitive.
  • Cost predictability:The combination of careful design, predictability of outcome and conservative approach allows the ReFORCE contractor to work to a fixed price.
  • Usable in submerged soil: ReFORCE Piles are formed using GeoTek resins, which react with water. It makes no effective difference whether the ground is saturated or just slightly damp, the correct pile forming reaction will always take place.
  • Designed system which passes Building Control scrutiny: Understandably, ReFORCE Piles are considered an extension to the structure in the same way as a steel pile or concrete underpin. As such ReFORCE piles are subject to Building Regulations.
  • Adaptable to awkward access and low headroom: Designed to be installed using hand portable equipment, essential where piles are to be installed in confined spaces, ReFORCE Piles have achieved installation depths exceeding 12 metres in low headroom.
  • Durable: GeoTek LV Geotechnical grade polyurethane resin is highly stable and resistant to breakdown in normal soils. Reports have indicated that this class of polyurethane is likely to exceed the durability of Portland cement on similar conditions.
  • Scalable: ReFORCE Lances are available in a range of sizes to suit the application.
  • Guaranteed: ReFORCE installations are automatically covered by a leading 12 year guarantee called ReFORCE Shield. This is a high quality latent defects warranty completely independent of the installer.

Technical limitations

Restricted for use in non-cohesive soils:
ReFORCE Piles are reliant on non-cohesive soil to form the permeation grouted column. This is particularly important directly under the foundation and where an end bearing must be formed. Clay lenses and mixed ground can be coped with on a case by case basis.

ReFORCE Permeation Systems