Special Use of Micropiles and Permanent Anchors

Micropiles and permanent anchors are important elements in geotechnical engineering. To use them successfully under difficult site and soil conditions it is necessary to improve the normal systems in due compliance with project specific specialist measures. Necessary improvements for difficult site and soil conditions are explained by three case histories. The first shows the production of micropiles und permanent anchors in tidal-zone and the improvement of the load bearing zone to guarantee the load bearing capacity through a wharf foundation. In the second example it is described how to protect permanent anchors against lime-attacking carbon dioxide in the groundwater in rock. The concept for the post-foundation under organic soil conditions of the Berlin State Library ”Unter den Linden” is the third case history.