فهرس المقالات Grouting

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  1 - Trial Chemical Grouting in Filter Materials at the Karkheh Dam Site, Iran
  M Heidarzadeh A. A. Mirghasemi Seyed. Majdedin Mir Mohammad Hosseini F. Eslamian
  A sodium silicate-based chemical grout was used in the Karkheh dam site in order to examine the performance of the chemical grouting technique for stabilization of the dam's filter material. Karkheh, an embankment dam with the reservoir capacity of about 7.4 billion cub أکثر

  A sodium silicate-based chemical grout was used in the Karkheh dam site in order to examine the performance of the chemical grouting technique for stabilization of the dam's filter material. Karkheh, an embankment dam with the reservoir capacity of about 7.4 billion cubic meter at the maximum water level, is the largest dam in Iran. The grouting works performed at the dam site, were part of the prerequisites for development of the dam's complementary cut-off wall. Since the dam was completed, the execution of the new cut-off wall from the dam crest was inevitable. Hence, one of the main difficulties associated with the development of the new wall was trenching and execution of plastic concrete wall through filter materials of the dam body. To resolve this technical problem, the method of chemical grouting was employed. However, the process was so challenging since little research work has been devoted to the application of grouting technique in filter. Wide testing program including full scale tests were performed to obtain optimized mix design and grouting program. A full scale platform consisting actual filter materials was constructed and undergone various tests. Results of the testing program revealed that a chemical grout consisting of sodium silicate, water, and ethyl acetate with proper mix ratio can successfully stabilize the filter of the dam body. تفاصيل المقالة
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  2 - Numerical finite element modeling for earth-dam grouting and curtains wall design by Plaxis software
  Reza Poursalim Alireza Alizade Majdi
  10.30495/geotech.2020.679345
  The presented study provide the numerical view and finite element (FEM) based modeling for earth-dam sealing curtains wall in earth-dam by using grout injection procedure. In this regard the plaxis software was used to estimate the variations and provide the simulation أکثر

  The presented study provide the numerical view and finite element (FEM) based modeling for earth-dam sealing curtains wall in earth-dam by using grout injection procedure. In this regard the plaxis software was used to estimate the variations and provide the simulation which is implemented in geometrical modeling, boundary conditions, assign materials properties, behavioral model, mechanical modeling and seepage analysis. Modeling conduced for two case groups related to before and after curtains wall design. According to the results of seepage analysis, it has been determined that when the sealing curtain is not applied, deformations due to stress, strain and pressure of the perforated water cause changes in the dam area and its expansion in sediments. On the other hand, the expansion of strain in the core range reflects the phenomenon of plastic behavior of the core and downstream, which is the result of in-situ stress and water pore-pressure in it. تفاصيل المقالة