Tunnel construction under the Thames

In the 19th century, a tunnel was built under the Thames River, a navigable waterway in London. This ambitious project was led by Marc Brunel, a French engineer who had moved to England, and it took him eighteen years to complete.

Engineering challenges and innovations

During the construction, Marc Brunel faced significant challenges, including water seepage and tunnel collapses. To address these issues, he invented a tunnel shield, a groundbreaking technique that helped stabilize the tunnel walls and prevent collapse.

Personal and professional risks

A major flood in 1828 caused serious damage and injured Isambard Brunel, Marc's son and a future famous British engineer. Despite this setback, the tunnel was completed in 1843, though the project had exceeded its original budget.

Financial limitations and public access

The cost of construction reached over 650,000 pounds, far exceeding initial estimates. This financial strain prevented the building of access ramps for carriages, so the tunnel was opened in 1843 as a pedestrian walkway with a penny admission fee. It quickly became a popular tourist attraction, drawing up to two million visitors annually.

Future of the tunnel and railway use

The financial burden on the original investors led to discussions about selling the tunnel as early as 1846. In 1869, the East London Railway acquired the tunnel and adapted it for train use. The tunnel has continued to serve London's railway network for more than one and a half centuries.