Exercise 4 Basements This tutorial worksheet forms part of Assessment 1 – Folio. Introduction Assume the following: You are a construction company employed to design and construct a new 20 storey office building which will include an additional two storeys below ground level. The site is in the City of Perth and is bounded on the North by Terrace Road and on the South by Riverside Drive (see Figure 1). The site is 50 m long by 50 m wide and is next to Riverside Drive. It is essential that the building be designed to use as much of the site as possible in order to maximise the financial return on the investment. Initial designs by the Structural Engineers indicate that they prefer a concrete framed building with a “retaining wall and raft” type basement. You are to attend a preliminary meeting with the client organisation at which they will expect a description of your proposed basement design with justification. Figure 1: Location of proposed office building on existing vacant site Sequence of Tasks In order to provide the required information you will need to undertake the following tasks: Identify facts known about the site and seek additional information (as appropriate). (10 marks) Identify the problems to be considered when designing the basement. (15 marks) Choose the most appropriate construction method: (25 marks)Decide on the method; andList how this deals with the site problems. Choose a method of waterproofing the basement: (20 marks)Decide on the method; andList how this deals with the site problems. Choose excavation plant to be used and provide reasons for choice. (10 marks) Provide a scale drawing of the site and basement to illustrate your proposal. (20 marks)
