Qualter Hall receives contract for work on Thames Barrier

Qualter Hall has been awarded a major contract for work on the Thames Barrier.

According to a statement, the project consists of two elements — namely an oil hydraulics package for a gate arm synchronisation pilot trial (GASPT) on piers three and four at gate Golf, and a drive equipment package for a shift and latch (S&L) mechanism on gates Charlie and Delta on pier seven.

The GASPT requires the introduction of hydraulic power units and a load balancing control system that is compatible with the existing retained systems.

The performance of the new system is to be tested over the full operating range and modes of the barrier. The system will be trialled for six months under normal gate operations. Operator training will take place during this period.

The current S&L mechanisms were installed some 30 years ago and will require a full strip-down, inspection and refurbishment where required.