#Typesy 2017 crack crack
Furthermore, a two-dimensional finite element model of soil with a single crack is established to carry out numerical simulation analysis considering the crack width W, crack depth D and complex crack conditions. There exists an R min value corresponding to a specific electrode distance d value at each R f - d value obtained by laboratory experiments.
The electric resistance method is based on the principle of differences in electrical properties between cracks and soil, which could be used to measure the single crack depth at project sites. Obtaining geometric parameters, especially depth, and describing the morphological characteristics of cracks are of great significance to control engineering disasters and accidents caused by cracks. The new model can therefore be used to determine the geometrical parameters of the failed blocks of riverbanks subject to planar failure. Based on a comparison of these errors with those derived from a range of existing equations, we show that this represents a considerable improvement relative to prior studies. Based on observations from field and laboratory tests, we found that the new model provides a mean relative error (MRE) of 4%, 23%, and 27% between calculated and observed values of failure plane angle, tension crack depth, and bank-top retreat, respectively. The estimated tension crack depth is then used in a bank stability analysis, from which the failure plane angle can be evaluated. This is achieved by employing a combination of field and laboratory data to first derive a set of empirical curves to estimate the tension crack depth.
In this paper we introduce a new analytical method to estimate the failure plane angle. To reliably analyze the stability of riverbanks against planar failures many parameters (including the failure plane angle and the depth of the tension crack) have to be determined. Of the many different types of riverbank failure, the planar failure mechanism is perhaps the most common, being associated with steep, relatively low banks composed of cohesive sediments.
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