Civil Engineering

Colbonddrain

High-quality prefabricated vertical drain (PVD)

OVERVIEW

Installed with a purpose-built installation rig mounted on a hydraulic excavator.

Speedy consolidation of marshy soils

Speedy consolidation of marshy soils

A highly effective solution for a major engineering challenge. Can achieve 90% pre-construction consolidation of soils and soft clays in marshland areas within months rather than years, improving safety and drastically reducing cost.

Functions
  • Vertical drainage.
  • Forms an upward path for excess pore-water to drain off to the surface, resulting in a stable subgrade for construction.
  • Developed in partnership with leading European consultants, laboratories and geosynthetics specialists.
  • Unique combination of patented core structure and nonwoven filter bonded to core increases water flow capacity.
  • Core: hydraulic channel profile ensures laminar flow for optimum performance.
  • Nonwoven filter layers deliver optimum filtration, permeability and strength.
  • Thermal bonding ensures that the filter is kept taut across the flow channels.

Comprehensive range of applications

  • Use in depths up to 100m.
  • High tensile strength allows use on all installation rig types.
  • Suitable for all soil types.
Comprehensive range of applications
EASY TO HANDLE

EASY TO HANDLE

  • Filter cannot tear or become separated from the core.
  • Roll length of 280m reduces number of connections.
  • Efficient packaging allows high transport loads and reduced storage time on site.
Applications enabled by this product

Embankments On Weak Soils And Areas Prone To Subsidence

Scour & Erosion Protection

Sediment Control

Soil Consolidation & Land Reclamation

Wind Farms

Technical details
  • Colbonddrain is a prefabricated vertical drain which should be installed with a purpose built installation rig mounted on a hydraulic excavator.
  • If the compressible clay is very deep or contains gravel bands, special techniques such as vibrators and heavy mandrels may be required.
  • Colbonddrain is 10cm wide with a robust polymer core, covered on both sides with a strong and permeable filter fabric.
  • Rolls come in lengths of 280 linear metres.
  • The outer filter fabric of Colbonddrain is bonded to the core structure over its entire surface to form a homogenous geocomposite.

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