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Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
Tunneling speeds increase over time. The first TBM peaked at 4 meters per week. This increased to 16 meters per week four decades later. By the end of the 19th century, speeds had reached over 30 meters per week. 21st century rock TBMs can excavate over 700 meters per week, while soil tunneling machines can exceed 200 meters per week.
The following is a list of speed records for various types of vehicles.This list only presents the single greatest speed achieved in each broad record category; for more information on records under variations of test conditions, see the specific article for each record category.
The Martina tunnel boring machine (officially named as the S-574. [1]) is a hard rock tunnel boring machine built by Herrenknecht AG.It is the largest hard rock tunnel boring machine in the world and has been used for drilling the Sparvo Tunnel, a part of the larger Variante di Valico project in Italy.
Masters athletics is a class of the sport of athletics for athletes of over 35 years of age. The events include track and field, road running and cross country running.These are the current world records in various five-year-groups, maintained by WMA, the World Association of Masters Athletes, which is designated by the World Athletics (formerly IAAF) to conduct the worldwide sport of Masters ...
However, the detonated yield turned out to be 50,000 times greater than anticipated, creating a jet of fire that shot hundreds of meters into the sky. [8] During the Pascal-B nuclear test of August 1957, [ 8 ] [ 9 ] a 900-kilogram (2,000 lb) iron lid was welded over the borehole to contain the nuclear blast, despite Brownlee predicting that it ...
Teenager Pan Zhanle swam the fastest 100 meters in history as he led off China's gold medal-winning 4x100 freestyle relay team. ... with the Olympics starting in Paris in just over five months ...
13.01 m Liu Li China 13 July 2023 World Para Championships: Paris, France [90] F33: 12.36 m Evgenii Malykh Russia 25 October 2015 Doha, Qatar [86] F34: 12.25 m Ahmad Hindi Jordan 4 September 2021 Paralympic Games: Tokyo, Japan [91] 13.38 m Scott Jones Great Britain 25 July 2013 IPC World Championships: Lyon, France F35: 17.32 m Khusniddin Norbekov