Geotechnical engineering / design of temporary works such as roads, cuttings, embankments, and bridges
HS2's Contracts C2 & C3 cover the 80 km long section in the central area between London and Birmingham, between the north portal of the Chiltern Tunnels and the south portal of the Long Itchington Wood Green Tunnel. This is a primarily rural area, and the engineering challenges include embankments, cuttings, viaducts, and cut-and-cover tunnels. The temporary works required for the construction of the high-speed railway line include compounds, haul roads, road diversions, utility crossings, embankments, cuttings, bridges, working and crane platforms, and more.
Made ground generally overlying a variable sequence of sands, sand and gravel and firm clays, generally overlying extremely weak to medium strong mudstone, siltstone, and limestone.