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Cement grouting in geotechnical projects

Paraskakis Manousos

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Year 2024
Type of Item Master Thesis
Bibliographic Citation Manousos Paraskakis, "Cement grouting in geotechnical projects", Master Thesis, School of Mineral Resources Engineering, Technical University of Crete, Chania, Greece, 2024
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The purpose of this work is to study and optimally design the cement grouting in geotechnical projects.Initially, a literature review was carried out regarding the effect of groundwater on the hydrotechnical projects (dams). The rock mass classification methods (according to Bieniawski, Barton and GSI) and their application in sealing works were analyzed. This was followed by a report of the most common in-situ test methods for assessing the water permeability of the geological formations. (Lugeon, Lefranc and Maag).Then the categories of injections that can be applied for sealing/stabilization of rocks and soils, in each type of project, the equipment required and the pressures that must be applied to each geomaterial were analyzed. Next, the design and implementation of impregnation injections are analyzed, which are also the most frequently applied injections in hydrotechnical projects, the effect of factors on the effectiveness of the injections and methods of assessing their effectiveness.Using the finite element software Seep/W, the groundwater flow was simulated in a standard cross-section of dam constructed of roller compacted concrete, in graphitic shale and phyllites with quartzite intercalations. Different scenarios were studied for the optimal design of the grouting works related to the size of the cementing curtain, the permeability of the geological formations and the height of the water in the reservoir.

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