In depth

The redevelopment of two Vienna metro stations to accommodate new lines has required extensive and innovative propping.

The doubling of a section of the Ebbw Vale rail line to increase capacity required some geological sleuthing to minimise risks – and keep within budget.

Redeveloping the Old War Office building in central London as a luxury hotel with an extended basement required a comprehensive foundation system.

In-depth ground investigations have been crucial for the development of a piled retaining wall on the landslide damaged B4069 in Wiltshire.

Groundwater management has ensured smooth progress on the Silvertown Tunnel project in London, write WJ UK project manager Emily Riley and executive chairman Toby Roberts.

Curtins senior engineer Emma Scholes presents a case study of earthworks trials at a backfilled former opencast colliery site at Woodville in Derbyshire.

Extensive trials on High Speed 2’s (HS2's) major earthworks programme south of Birmingham have led to carbon and cost savings.

Complex ground investigation and monitoring work has been carried out on water and land for the Environment Agency’s flood alleviation scheme along the River Thames.

High Speed 2’s Chiltern tunnels run through permeable chalk requiring extensive ground treatment. Nia Kajastie gives an update on grouting works on the tunnel cross passages.

Engineers working on the Silvertown Tunnel in East London have used ground freezing to excavate several cross passages for the twin bore tunnel.