Arch Installation

Installation of One piece arch structures is straightforward with each precast arch unit being installed directly within a prepared keyway. After grouting the keyway the arch is backfilled in layers with granular fill around and above the arch.

Two piece TechSpan arches are erected in a staggered and symmetrical manner so that adjacent elements support each other during the erection and backfilling sequence. This procedure allows a rapid and safe installation, reducing the disruption to the flow of traffic. This is especially beneficial for railway and hydraulic applications.


Backfilling is undertaken in horizontal steps on either side of the structure with alternate layers being placed and compacted.

On site training is provided at the commencement of installation and backfilling for all arch structures.