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| OPTIMAL PARAMETER SELECTION OF CEMENT-WATER GLASS TWO-SHOT GROUTING |
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Received:August 19, 2005
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| KeyWord:Cement-water glass; Two-shot grouting; Mixture ratio; Initial gel; Final gel |
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| Abstract: |
| With its controllable solidifying velocity and vast raw material source,cement-water glass(CS)two-shot grouting has found wide applications in many geotechnical projects.The author,based on the project of maintaining tunnel collapse in Linglong Gold Mine,made gel experiment on different volume ratio of cement grout to water glass.According to the experiment result,the author found that the initial gel velocity changed not too much,but the final gel velocity changed a lot,and furthermore,the velocity of gel with varied volume ratio presented an inflexion in its curve with a sharply rising tendency after the inflexion.Based on this find the idea was formed that selecting grouting mixture ratio parameter near inflexion was favorable to the project in view of economy.The idea was verified in the construction of the project of maintaining tunnel collapse in Linglong Gold Mine.The result has great reference value for the similar project in the future. |
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