COMPOSITE DIKE STABILIZATION SYSTEMS

Solico Engineering BV (Netherlands)

Innovation Awards Finalist 2019

A new dike stabilization method was developed by JLD International. All the structural parts in this system are made of composite materials. These parts were designed by Solico Engineering.

Key Benefits:

  • Sustainability
  • Cost effectiveness
  • Lightweight

The JLD dike stabilization system is a sustainable, flexible and innovative solution that was developed for the reinforcement of existing dikes. The JLD dike stabilizer is applied in the inner slope of the dyke and installed from the inner slope or crest. Therefore, no widening of the relevant dyke is required in many cases. The dike stabilization system consists of several parts, including three important parts made from composite material: the anchor rod, the transverse load carrying element (LDE) and the anchoring plate. The anchor rod is a 25mm basalt fibre-reinforced rod with a specially formed thread on the outside. Basalt fibre was chosen because of its higher tensile strength compared to E-glass and better sustainability in the ground.

The anchor rod is pretensioned to a required load level, based on soil mechanics calculations. The pre-tension in all anchors is monitored constantly with loads cells. The transverse load carrying element (LDE) is an E-glass composite pultruded profile designed to carry the shear force at the moment the dike is collapsing. The LDE is a star-shaped pultrusion with a wall thickness up to 25mm.

The anchor plate is a flat rectangular plate (1m x1m) designed to transmit the anchor force (up to 10 tons) to the soil. It has to be lightweight (for installation), sustainable and very cost effective. A very important feature is that the plate has to be perforated, with about 25 holes of 50mm diameter. The 40mm-thick GRP plate is produced by vacuum infusion. The perforation is already present in the mould, thus avoiding expensive drilling. The plate is constructed as a kind of sandwich structure with recycled GRP as a core material and stitched biaxial glass fabrics as skins.

Composite dike stabilization system