The ability to specify a single bond strength between a soil nail and the surrounding soil (using CIRIA guidance or preliminary test data) does not work if the soil is layered. The user should be able to specify the bond strength for each strata.33 votes
Duncan Hollis is considering ways to deal with this
Two current ideas:
a simple proportioning of the contributions to a point's displacements based on how many sides contribute, if 2, then each 50%, if 3, then each 30% etc. But may also need consideration for the angle. Simple geometrical solution (with warning) if nothing better received.
a geometric solution which could be coded and compared to finite element analysis.
Same ideas can apply to changes in ground movement curve between one wall and another.11 votes
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