The A63 road is a £350 million investment in reprofiling the A63 carriageway in Hull, England. The reprofiling served several large sewers.

Before the main civil work began, several large-diameter and brick egg-shaped sewers needed to be diverted by tunnelling techniques, including pipes from 1200 mm to 1800 mm in diameter. The detailed design had to consider the constructability and temporary works design given the major challenges associated with the ground conditions, including very soft alluviums and perched water tables.

Shaft designs included in situ concrete, precast caissons, sheet piling and secant pile construction. Extensive ground improvement was required to mobilise the jacking forces required for the tunnelling in addition to providing sufficient stabilisation for the secant pile rig.

The work included extensive ground investigations, detailed settlement analysis and advanced utility diversions with numerous utility providers. Extensive approvals from Highways England were required for two major crossings of the A63.