MELVILLE SPILLWAY,
COMPLEXE SHAWINIGAN
INVESTIGATION OF CONCRETE
AND STEEL COMPONENTS (PHASE I)
INVESTIGATION OF MELVILLE SPILLWAY
CONCRETE (PHASE II et III)
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CLIENT
Hydro-Québec
LOCATION
Shawinigan
DURATION
1994
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PROJECT CHARACTERISTICS
Given the presence of two drilling teams and
three subcontractors, the works called for close coordination with Hydro-Québec to ensure efficient operations and the safety of workers.
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SERVICES RENDERED
Phase I
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Detailed description of the characteristics of concrete surfaces |
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Coring and drilling of concrete elements |
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Laboratory tests |
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Underwater inspection of the headbay |
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Inspection of steel components |
Phase II et III
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Geotechnical studies and detailed descriptions of existing works and foundations |
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Rock permeability pressure test |
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Recommendations for rebuilding of foundations (injection) |
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PROJECT DESCRIPTION
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Phase I: The Melville spillway, 152 metres long and 10.7 metres high, is one of Complexe Shawinigan's two dams-spillways. It includes 13 piers and 12 external control sluices, as well as 2 sluices inside a building. |
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The project consisted of a comprehensive investigation of the concrete and steel structures. A total of 6 8-m drill holes were made in the cement concrete above the piers (to the rock), as well as 20 boreholes, 150 mm in diameter, in the piers and carriers. Moreover, a surface inspection of the concrete was carried out to check for delamination and cracking. Laboratoires Shermont participated in this process, notably with regard to: :
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Site visit for assessing the scope of the works and preparing the necessary budget. |
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Client meetings to determine needs and set timeframes. |
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Planning of the works. |
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Coordination with hydroelectric power plant representatives for closing of the sluices to allow for safely performing the necessary activities. |
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Supervision of site personnel: A boring team (100 and 150 mm Æ). |
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Supervision of laboratory work:
Visual inspection of boreholes;
Crushing strength;
Determination of air void system;
Alkali-granulate reaction tests. |
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Preparation of synthesis report. |
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