1. What are the concerns of project manager Bryan Lee? Bryan -lees concerns are ; Do building methods & materials match those in the agreement ? , Are schedules 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? The shield , driven by electricity hydraulically powerd pistons can bring six thousands pounds of pressure against the earth ,convevor belt ,air ducts .
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?To protect peoples health , the shield has a built -in gas detector , and each miner wears a belt , lifesaving supply of oxygen .
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