3315 x 3314 px | 28,1 x 28,1 cm | 11,1 x 11 inches | 300dpi
Data acquisizione:
25 ottobre 1996
Ubicazione:
London, UK.
Altre informazioni:
Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.
Engineers removing the metal wall from one of the original Jubilee Line rail tunnels at Green Park within a specially created enlargement known as a step plate junction to join the original line (opened in 1979) with the new Jubilee Line Extension. A step plate junction is a special rail structure where tunnels of differing diameters join - the step is the vertical wall filling the gap between them. Step plates are usually created by using SGI (spheroid graphite) corrosion resistant cast iron segments which either form circular or elipsoidal support rings. This step plate junction is 90m in length and 25m below street level. The Jubilee Line covers 36.2km (22.5 miles) and serves 27 stations between Stanmore and Stratford. The equivalent statistic for the new extended section is 16km (10 miles) of which 12.4 km (7.7 miles) is in tunnel and 3.5 km (2.3 miles) on the surface. Work started on the £3.5 billion project to extend the Jubilee line in December 1993. The extension runs from Green Park to Stratford and was opened in three phases during 1999.
