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Mounting excitement at equestrian college

EQUESTRIAN FACILITIES at Hartpury College in Gloucestershire are being extended for next year's World Para Dressage Championships, the main qualifying event for the Beijing Paralympics in 2008.

Main contractor Yorke is enlarging the outdoor arena and building a new indoor one.

Yorke awarded a £70,000 contract to Phi Group to design and build two timber crib retaining walls for the indoor arena, which is close to slopes at the edge of the site.

One wall retains the embankment next to the building and the other supports the slope next to its access road.

The crib components form a series of open cell modules lled with stone to counteract earth pressures and surcharge loadings.

Structural integrity is achieved through the interaction of the timber crib elements and the granular fill.

The walls, finished this summer, are up to 6m high and total more than 120m in length. Built at the standard angle of 14º, they were installed in five weeks.

Ritchies last month completed the raised working platform for grouting on the shaft isolation project at the Dounreay nuclear reactor in north east Scotland. Shaft isolation will allow removal of radioactive waste in the shaft (GE July 2006).

The shaft is at the edge of a low cliff, and the platform was needed to provide a sound, stormproof area for the drill rigs and grouting teams.

A concrete perimeter fence is now being built to provide further weather protection.

Construction, which began in March, involved 10,000m 3 of concrete, much being cast in tidal conditions.

Main grouting is expected to start in the next few months once grouting trial results have been fully assessed and methods finalised.

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