Abstract
The ground model is fundamental to any engineering project with ground structure interaction. Linear infrastructure projects have many forms of ground interaction and ground models are essential. All ground models are hypothetical. Interpolation or extrapolation from known data is required in order to form a prediction of the ground characteristics at any particular location. There is therefore inherent uncertainty in every ground model. The reliability of the ground model may be considered to be a function of (1) the accuracy or reliability of the data on which it based; (2) the quantity of data or ground information available; (3) the geological complexity of the ground from which the data has been obtained and (4) the complexity of the ground response to changes induced by the project. This paper presents a method of assessing ground model reliability for linear infrastructure projects based on an assessment of these four key factors. This method has been applied to three linear infrastructure projects in Australia, which are discussed.
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