1. What are the concerns of project manager Bryan Lee?
His many concerns are do building methods and materials match those in the agreement? Are schedule met? Are costs kept within bounds?
2. Why do they engineers and construction workers use a boring machine to make tunnels instead of cut and cover construction?
Boring creates far less surface disturbance than cut and cover construction.
3. What do the worker’s do to protect themselves in the newly formed tunnels from harmful levels of gases found in the soil at the various new subway sites?
There have a powerful fan to suck stagnate tunnel air through these duct and out of the tunnel. As the foul air departs, fresh air rushes in .
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