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Rear of tunnel boring machine with completed tunnel walls behind it in 2017. On December 22, 2015 at 12:30 a.m., the machine resumed digging 1.5 feet (0.46 m) through sand poured into the recovery pit. By January 4, Bertha had traveled 1,098 feet (335 m) of its planned 9,270-foot-long (2,830 m) route from SoDo to South Lake Union. [5]
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 .
A tunnel boring machine used to excavate the Gotthard Base Tunnel, Switzerland, the world's longest rail tunnel. An earth pressure balance TBM known as Bertha with a bore diameter of 17.45 meters (57.3 ft) was produced by Hitachi Zosen Corporation in 2013. [40] It was delivered to Seattle, Washington, for its Highway 99 tunnel project. [41]
2.2 × 10 −3: 1.3 × 10 −3: 2 × 10 −12: Typical speed of Thiovulum majus, the fastest-swimming bacterium. [10] 10 −3: 0.00178: 0.00641: 0.00398: 5.94 × 10 −12: The speed of a particle orbiting a ball of lead of radius 1 m near its surface under its gravity (that is, the first cosmic speed for this ball). 0.00275: 0.00990: 0.00615: 9 ...
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 ...
Land speed records by surface Category Speed (km/h) Speed (mph) Vehicle Operator Date Certifier Refs On ice: 335.7: 208.6: Audi RS 6: Janne Laitinen 9 Mar 2013 FIA [19] On the Moon: 18.0: 11.2: Apollo 17 Lunar Roving Vehicle (LRV‑003) Eugene Cernan: 11 Dec 1972 (unofficial) [20] On Mars: 0.18: 0.11: Mars Exploration Rovers Spirit and Opportunity
The 5-foot-tall sixth-grader placed second among all girls and women at the Ventura Marathon in February when she ran the 26.2-mile course in 2 hours 58 minutes, averaging less than 7 minutes per ...
Olympic silver medalist Kenny Bednarek set the fastest time of the year in the 200 meters in 19.67 seconds at the Doha Diamond League on Friday. With a tailwind of +1.7 within the legal limit ...