Posted Apr 4, 2015, 12:08 PM
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Join Date: Dec 2014
Posts: 144
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can a TBM be re used
Following the thread on re using the TBM ...
why bother.
Besides the TBM perhaps being suited for different soil conditions than would be found on the UBC line, there is the simple fact that a TBM is cheap.
The whole machine costs 10 million - or so I have heard. On a 12 kilometer build (Clark to UBC) you would get two of those machines - or maybe even three - and build the whole line at once... Clark to Oak street, Oak Street to MacDonald, MacDonald to UBC..... each a 4 k section.
And nothing prevents some parts being constructed from west to east .. for example, MacDonald is the extraction point for the spoils from the line that goes to UBC and the one that goes to Oak Street. Clark is the spoils extraction site for the line that goes to Oak street.
What's 30 million on a budget of 3.5 billion if it speeds up the construction by 2/3rds or even just half.
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