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Strengthening Old Buttress Dams 731

NEW INNOVATIVE TECHNIQUE FOR STRENGTHENING OLD BUTTRESS DAMS AND MULTIPLE ARCH DAMS

ABSTRACT

INTRODUCTION

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CHALLENGES WITH NORWEGIAN BUTTRESS DAMS

Load situation Factor of safety for Overturning Sliding

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RECONSTRUCTION OF DAM KROKAVATN

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Dam Safety Evaluation

Alkali Aggregate Reaction (AAR)

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Rehabilitation Works

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Alternative Cost(NOK)

Cost(US$)

Difference(%)

Evaluation of Stability

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Pictures of the Construction Works in 2014

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OTHER METHODS FOR STRENGTHENING FLAT SLAB BUTTRESS DAMS

New Slab on the Downstream Side (Alternative A)

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New Buttresses Only (Alternative B)

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STRENGTHENING OF MULTIPLE ARCH DAMS

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Reconstruction to a Solid Head Buttress Dam (Alternative C)

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New Buttresses Only (Alternative D)

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New Slab on the Downstream Side (Alternative E)

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CONCLUSION