This example involves the dry construction of an excavation. The excavation is supported by concrete diaphragm walls. The walls are tied back by prestressed ground anchors.
PLAXIS allows for a detailed modelling of this type of problem. It is demonstrated in this example how ground anchors are modelled and how prestressing is applied to the anchors. Moreover, the dry excavation involves a groundwater flow calculation to generate the new water pressure distribution. This aspect of the analysis is explained in detail.
Note: with PLAXIS 2D 2012, Plaxis introduced the embedded pile row feature. With this new feature, ground anchors can be modelled more realistically compared to the older method of using a geogrid to model the grout body (bonded length).