Rock Grouting OARS, Phase 2

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? PROJECT SUMMARY Rock Grouting OARS, Phase 2 Columbus, Ohio moretrench.com Drill and blast installation of the three deep shafts through highly variable karstic conditions was the challenge facing the design and construction teams for Phase 2 of a 23,000 foot-long sewer tunnel in Columbus, OH. A specially designed pre-grouting program developed by Moretrench was key to successful excavation in the dry. The OSIS Augmentation and Relief Sewer (

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Rock Grouting OARS, Phase 2

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