Which excavation would you suggest to the contractor, what concerns would you advise him on and what would you advise him to do?

Learning Goal: I’m working on a civil engineering exercise and need an explanation and answer to help me learn.Cut and cover methods are used quite often for pipelines and structures below but near the ground surface. Suppose you are going to work on a structure where the roof of the structure is located 10 feet below grade. Now suppose this structure is going to be located under a heavily used roadway in town. There are buildings along both sides of the roadway and multiple utilities located in the 10 feet of ground above the roof of the structure. Groundwater is located 2.5 feet below the ground surface and when excavated, the ground shows moderate inflow to the excavation.The contractor cannot decide if he should excavate from the top down or the bottom up. There are some issues associated with what work would have to be performed which would help in his decision making. Which excavation would you suggest to the contractor, what concerns would you advise him on and what would you advise him to do? please answer the above with one to two paragraphs. – answer the following in a separate document –> Describe the various types of dewatering that can be used under varying circumstances. What are the good and bad aspects of each type? When dewatering a site, there is potential that there will be settlement of the ground surface and structures. What ways can be used to mitigate the effects of dewatering on structures? Groundwater solutions are very important to the design and construction of underground works. In a list of five or more solutions, briefly describe each solution and its possible resultant effect . This exercise encourages you to look at a topic of high importance to any underground excavation. Addressing groundwater can be a difficult problem to resolve, and it is quite helpful to understand the options available. Problems associated with groundwater dewatering can be significant, and you will know what to look for should significant dewatering be required. You are asked to consider the options available and select a method that is most appropriate for the circumstances.
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