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Keywords: watertightness
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Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-189
.... TNe'strength of the injected rock. 3. Watertightness. In the case of injection into the sand, the material of low viscosity and long gel time (permeable grouting material) have been usually used to enable a low pressured injection. But in this tunnel, it was predicted that it was not effective to use...

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