Deflection prediction of the Bristol Road sewage storage tank, Bridgwater, by using a two dimensional deep excavation and finite element analysis method

Dogan, Levent (2015) Deflection prediction of the Bristol Road sewage storage tank, Bridgwater, by using a two dimensional deep excavation and finite element analysis method. MSc dissertation, University of Portsmouth.

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    Abstract

    This report concerns the prediction of ground movements and lateral displacements caused by an embedded/circular sewage storage tank in cohesive alluvium using a finite element software, namely Plaxis 2D Ver. 8.2.
    The traditional hand calculations and deflection prediction’ techniques of deep sewage storage tanks or deep embedded walls are far too simple to be solely relied on in practice. In addition, hand calculations and traditional methods are usually conservative which leads to expensive solutions. Therefore, it is prudent to use a reliable and more effective methods in order to predict soil/wall deflections or deformations an early stage for proposed schemes. Deep excavations may require for deep sewage storage tanks in deep layers of soft clays, it is difficult to control soil and pore water movements. If this is the case, accurate predictions of deformations are a crucial consideration in the design of the earth support system. This report, describes outcomes of numerical experiment which based on non-linear finite element analysis and incorporating a pore water stress distribution on a generated computing model. The analyses take into account undrained deformations around a tied wall in a cohesive and granular alluvium. Main properties considered in this report are moderate conservative soil parameters, type of wall and support spacing. A simplified framework is developed to interpret wall deflections in different combinations and movement with excavation stages.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 13 Nov 2015 14:47
    Last Modified: 13 Nov 2015 14:47
    URI: http://eprints.port.ac.uk/id/eprint/18876

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