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http://dx.doi.org/10.12989/gae.2019.17.4.367

The observation of permeation grouting method as soil improvement technique with different grout flow models  

Celik, Fatih (Department of Civil Engineering, Faculty of Engineering, Nigde Omer Halisdemir University)
Publication Information
Geomechanics and Engineering / v.17, no.4, 2019 , pp. 367-374 More about this Journal
Abstract
This study concluded the results of a research on the features of cement based permeation grout, based on some important grout parameters, such as the rheological properties (yield stress and viscosity), coefficient of permeability to grout ($k_G$) and the inject ability of cement grout (N and $N_c$ assessment), which govern the performance of cement based permeation grouting in porous media. Due to the limited knowledge of these important grout parameters and other influencing factors (filtration pressure, rate and time of injection and the grout volume) used in the field work, the application of cement based permeation grouting is still largely a trial and error process in the current practice, especially in the local construction industry. It is seen possible to use simple formulas in order to select the injection parameters and to evaluate their inter-relationship, as well as to optimize injection spacing and times with respect to injection source dimensions and in-situ permeability. The validity of spherical and cylindrical flow model was not verified by any past research works covered in the literature review. Therefore, a theoretical investigation including grout flow models and significant grout parameters for the design of permeation grouting was conducted in this study. This two grout flow models were applied for three grout mixes prepared for w/c=0.75, w/c=1.00 and w/c=1.25 in this study. The relations between injection times, radius, pump pressure and flow rate for both flow models were investigated and the results were presented. Furthermore, in order to investigate these two flow model, some rheological properties of the grout mixes, particle size distribution of the cement used in this study and some geotechnical properties of the sand used in this work were defined and presented.
Keywords
permeation grout; spherical flow model; cylindrical flow model; inject ability of grout; rate of injection;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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