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An Experimental Approach to the Development of Dynamic Pressure to Improve Grout Spread

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Abstract

Dynamic grouting is one of the methods to improve grout spread in rock that have been investigated since 1985. The results were promising, but all tests were performed under noticeable simplifications related to conditions in rock fractures. This study is an experimental approach to improve the grout spread using low-frequency instantaneous variable pressure as a new alternative with better control of filtration. The method is tested through parallel plates with constrictions of 30 and 43 µm under the applied pressures with 4 s/8 s and 2 s/2 s peak/rest periods. The results reveal conclusively the effectiveness of the method and provide a basis for further development of dynamic grouting.

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Acknowledgments

This study is part of the Transparent Underground Structure (TRUST) project and was funded by the Rock Engineering Research Foundation (BeFo), the Swedish Transport Administration, and the Development Fund of the Swedish Construction Industry (SBUF).

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Authors and Affiliations

  1. Division of Soil and Rock Mechanics, Department of Civil and Architectural Engineering, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden

    A. N. Ghafar, A. Mentesidis, A. Draganovic & S. Larsson

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  1. A. N. Ghafar
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  2. A. Mentesidis
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  3. A. Draganovic
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  4. S. Larsson
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Correspondence to A. N. Ghafar.

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Ghafar, A.N., Mentesidis, A., Draganovic, A. et al. An Experimental Approach to the Development of Dynamic Pressure to Improve Grout Spread. Rock Mech Rock Eng 49, 3709–3721 (2016). https://doi.org/10.1007/s00603-016-1020-2

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  • DOI: https://doi.org/10.1007/s00603-016-1020-2

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