By Friedrich-Karl Ewert
Fifteen years have handed when you consider that i used to be operating at a dam website large vising grouting paintings. That was once now not the 1st time that I needed to vehicle ry out engineering geological investigations for a number of related initiatives, which regularly incorporated trying out programmes to determine the permeability of the rock, and sometimes i used to be in command of grouting paintings. It therefore attracted my consciousness while this actual grouting programme didn't run as meant: many of the grout holes took merely little or no grout! it could actually now not be the purpose of the invested paintings just to drill holes and fill them back with out bringing approximately any longer development. thankfully, I had the opportunity to be en gaged in lots of different grouting programmes within the following years and used a lot of these examples to examine as completely as attainable the permeability of the rocks being taken care of in view in their grout skill. The extra I studied, the greater my conviction grew that our principles which had determined the grouting of rock for lots of de cades could be built extra, and for this reason I occupied my self with contributing a few rules for a brand new foundation to research and judgment of permeability of rock and for a extra sufficient software of this expertise.
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