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Experimental Evaluation of Reservoir Bottom Remediation Material

by R. J. Finno, Northwestern Univ, Evanston, United States,
A. S. Riccobono, Northwestern Univ, Evanston, United States,
J. Ehasz, Northwestern Univ, Evanston, United States,
D. L. Basinger, Northwestern Univ, Evanston, United States,
R. Cannon, Northwestern Univ, Evanston, United States,
C. K. Chung, Northwestern Univ, Evanston, United States,
N. D. Tandeles, Northwestern Univ, Evanston, United States,



Document Type: Proceeding Paper

Part of: Geotechnical Practice in Dam Rehabilitation

Abstract:

Open trenches developed through a compacted clay liner on the bottom of a reservoir. An experimental investigation has been conducted to evaluate the feasibility of using silt-sized, nonplastic silica, dolomite or hematite regrind concentrate placed underwater as a slurry to fill the void space. The investigation consisted of conducting index property and permeability tests on soils representing a range of foundation conditions in the reservoir and on the three proposed filler materials; consolidation tests on the proposed filler materials; and filter tests on composite specimens of foundation soils and filler materials. The results indicate that all proposed filler materials placed as a slurry to fill the trenches will not pipe through the underlying soil under the action of the imposed hydraulic gradient, and will consolidate sufficiently to produce a low enough coefficient of permeability so that significant head loss should be established across the filler material.

Subject Headings: Material tests | Permeability (soil) | Material properties | Consolidated soils | Soil analysis | Reservoirs | Pipe materials

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