geopolymer injection technology

URETEK geopolymers injection technology allows repairing railway embankments in the shortest time, while not affecting train traffic

Geopolymer resins help to strengthen and stabilise sunken crushed stone layer, also level concrete slabs of railway tunnels, stations, crossings and depots and lift them to designed height where necessary.

Railway infrastructure consists of many objects, including sections with railway tracks, tunnels, bridges, stations, depots, repair workshops, etc. All these objects suffer from loads caused by train traffic, as well as weather conditions and surface water.

Construction regulations prescribe establishment of groundworks consisting of crushed stone before installing rails. Railway embankment is made of bulk material (e.g. crushed stone). Regular load on rails and crushed stone causes uneven subsidence of different track sections. When subsidence exceeds maximum limits, the position of rails changes and using the tracks becomes unsafe. By using modern URETEK geopolymers injection method, it takes only a couple of hours to restore safe condition of tracks and strengthen crushed stone layer.

Stabilisation of crushed stone layer of railway embankment

Using geopolymers allows strengthening of soil under railway tracks and stop subsidence of crushed stone layer without dismantling rails and sleepers. Meanwhile, stabilisation of railway embankment does not require adding crushed stone. It is sufficient to insert geopolymer resin directly in railway embankment or the soil under it. Geopolymer material expands and exerts pressure vertically, thus lifting the tracks to their designed height.