Trident is a specialist contractor for the inspection and repair of bridges and tunnels

We undertake initial condition surveys to identify the nature and extent of any structural deterioration. This allows us to provide professional and informed advice on how to repair the defects in a cost effective and sustainable manner.

The need for repair and strengthening may arise from deterioration, changes in use, and changes in the relevant design codes, structural defects or seismic conditions. Trident uses the latest technologies to develop innovative strategies to restore or add load-carrying capacity to bridges.

Rehabilitation, strengthening and protection of concrete structures all require thorough investigations, clearly defined procedures, expert execution and systematic quality control. Through its wide range of construction and engineering services and systems Trident inspects and assesses bridges to determine present condition and to initiate any measures found necessary for restoration to full service condition.

Trident offers a wide range of specialist services in each of the main areas of structural investigation, repair, strengthening and protection for bridges. Repair and strengthening of structures may be required because of load capacity upgrades, changes of use, changes in the relevant design codes, slab openings, construction defects or damage caused by deterioration including cracking.


of bridge bearings

Bearing is an important structural element of a bridge. Its malfunction results into serious damage to the superstructure and the substructure. As such damaged/malfunctioning bearings need to be timely replaced. Catering to this very important need of a bridge, we carry out inspection of bearings to identify damaged/malfunctioning bearings. The structure is thereafter assessed in preparation for a possible lifting arrangement. New construction techniques are adapted resulting in faster project execution.

repair and replacement

of expansion joints

In the course of routine structural inspections, damage to expansion joints and deterioration due to age is often observed, which may require a joint to be replaced. If the bridge structure is otherwise in good condition, it is desirable to minimise the effort required and only replace the expansion joint itself without any impact on the bridge’s structure.

To make this possible Trident has developed a method which enables the substructure of the old joint to be left in place, saving the need to break it out. The new expansion joint is placed on to the old substructure, after the carrying out of any required repair works.

In doing this, the design of the new joint can be optimised to take account of the fact that deck shrinkage and creep, which had to be considered in the design of the original joint ,has already taken place. This may allow a joint with a lower movement capacity to be installed, reducing costs.


  • Design, fabrication, installation, maintenance and inspection services
  • No impact on the load-bearing structure
  • No delays in construction while concrete hardens
  • Quicker joint replacement results in minimum impact on traffic and lowers cost
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  • Inspection & condition evaluation
  • Design of repairs, Project Planning & Management
  • Repair of structure by pressure grouting
  • Repair of structure by epoxy concrete
  • Re-anchoring of pre-stressing tendons
  • Repair of wearing coat by laying new wearing coat
  • Concrete fireproofing repairs
  • Structural supports and shoring
  • Protective coatings and linings
  • Reinforcement repair
  • Concrete and structural repairs including
    • Crack repair
    • Repair of concrete honeycombing, delamination and spalling
    • Repairs to corroded embedded metals

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