Excavation Consolidation and Reinforcement
Maccaferri portfolio of solutions for excavation consolidation and reinforcement. We offer a range of solutions for the tunnelling professionals:
Fibreglass profiles and elements of varying cross-sections. They are inserted throughout the tunnel section, to form an array of reinforcing elements, resisting loads generated during excavation and preventing collapse and enhancing worker safety. This stabilisation effect means that a full-face excavation approach can be undertaken (ADECO-RS approach)
In problematic ground where achieving reinforcement or anchor performance is difficult, the P.E.R. Ground™ anchorage system can be used; an integral sheath around the reinforcement bar contains the injected mortars, compacting surrounding soils reducing grout-loss and washout.
Hybrid anchors, P.E.R.Ground Drain and P.E.R. Ground COPE enable simultaneous reinforcement and groundwater drainage or blockage respectively. Accidental or sudden water ingress can be blocked with polyurethane resins, which create expanding closed-cell foams.
Poor soils can be improved by the injection of Groutmaster™, a multi-function high performance grout which can; reduce the permeability of soils, control settlements, mitigate liquefaction, improve cohesion of granular soils, reduce the expansion of cohesive soils and be used in compensation grouting and void filling. We also offer fibreglass reinforcement bars for reinforcing concrete within temporary underground structures, e.g. diaphragm and retaining walls within the tunnel breakthrough ‘soft-eye’ zone. Rebar CRG simplifies future access through the reinforced concrete compared to traditional steel bars.