Mark brunell designed a large frame for the tunnel project. The frame is divided into 36 small units, and a miner in each unit digs clay in front of him. When many miners dig the same amount of clay, the frame can move forward and the empty place is paved with bricks.
When people walk through the double entrance of the Thames Tunnel designed by brunell and his son.
When the 1843 tunnel is opened, you can only walk through it. 1869, the East London Railway Company bought this tunnel to operate trains crossing the Thames. Since then, this tunnel has been used as a subway.
In the first few years of the tunnel, thousands of people walked through it. But then its reputation declined because it was difficult for many wagons to pass at the same time.
Issam Bud Kingdom Brunel (1809—1859) was the original inventor. His famous projects include the Avon Canyon Suspension Bridge in Bristol, England. The bridge was completed in 1864. He also built the first propeller-driven ocean-going hull ship in 1843. The most famous project in brunell is the Great Western Railway.