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Engineering · Civil Engineering
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AB Constructors have been awarded the project for constructing a new highway from Haldwani to Nainital. A part of the road (that involves digging a large tunnel though a hilljwas not included in the work awarded to AB Constructors. It is now being planned for as a separate/add-on project. After comparing digging by traditional methods to using a Tunnel Boring Machine (TBM), the client found that using TBM, though costly, will save lot of time in construction. The client is willing to pay these additional costs as it will help speed up the construction. The client has now asked AB Constructors for a separate quote for this work. AB Constructors have a running partnership with a TBM services supplier, who rent out TBMs as well as execute tunnelling work. So it should be reasonably easy for them to get the required equipment and expertise to execute the Tunnel. However, experts have raised the risks of finding extra-hard rock in some sections of the tunnel. iIf 7, extra-hard rock is encountered, then TBM goes at slower speeds with much higher costs (as the disk-cutters need to be replaced more frequently). Alternatively, AB Constructors could also dig these extra hard sections through traditional methods. In both cases, it will end up spending relatively higher money i.e. higher than what it will spend if extra-hard rock is not found) and longer time. AB Constructors needs to submit a proposal for this additional piece of work. Propose 2 different approaches that they can use for handling the above risks. You can be innovative in designing the proposal - Just dont be limited by existence (or lack) of any knowledge of Government regulations (6 marks)
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