subways in america extreme engineering respond thoroughly to all six questions. 1 of 6 why might the subway…

subways in america extreme engineering respond thoroughly to all six questions. 1 of 6 why might the subway systems of large cities be called the “circulatory system” of the city? 2 of 6 what made drilling under new york city nearly impossible one hundred years ago? how has that changed? 3 of 6 what is an immersed tunnel? how is it constructed? what obstacles does an immersed tunnel help tunnel builders overcome? 4 of 6 what is the “geometry train”? what does it do? why is it important to commuters? 5 of 6 how did the video show old trains being disposed of? is this a good idea? what are some alternate ways to dispose of these huge trains?

subways in america extreme engineering respond thoroughly to all six questions. 1 of 6 why might the subway systems of large cities be called the “circulatory system” of the city? 2 of 6 what made drilling under new york city nearly impossible one hundred years ago? how has that changed? 3 of 6 what is an immersed tunnel? how is it constructed? what obstacles does an immersed tunnel help tunnel builders overcome? 4 of 6 what is the “geometry train”? what does it do? why is it important to commuters? 5 of 6 how did the video show old trains being disposed of? is this a good idea? what are some alternate ways to dispose of these huge trains?

Answer

Brief Explanations:

  1. Subway systems transport people around the city like the circulatory system transports blood in the body, distributing resources (people) to different parts.
  2. One - hundred years ago, hard rock, water - filled soil, and lack of advanced technology made drilling difficult. Now, better drills and tunneling methods have changed this.
  3. An immersed tunnel is a tunnel constructed underwater by sinking pre - fabricated sections into a trench. It helps overcome obstacles like deep water and soft soil.
  4. The "geometry train" is a vehicle that measures the shape and alignment of tunnels. It ensures tunnels are built to the right specifications for smooth train operation, important for commuter safety and efficiency.
  5. If the video shows old trains being sunk in the ocean as artificial reefs, it can be a good idea as it creates habitats. Alternatives include recycling the metal, repurposing for non - transit uses like restaurants or museums.

Answer:

  1. Subway systems distribute people throughout the city, similar to how the circulatory system distributes blood.
  2. Hard rock, water - filled soil, and lack of advanced technology made drilling difficult. Now, better drills and tunneling methods are available.
  3. An immersed tunnel is an underwater tunnel made by sinking pre - fabricated sections. It overcomes deep water and soft soil obstacles.
  4. The "geometry train" measures tunnel shape and alignment. It's important for commuter safety and efficient train operation.
  5. If shown being sunk as artificial reefs, it can be good for creating habitats. Alternatives: recycle metal, repurpose for non - transit uses.