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| A PEAK SHEAR STRENGTH MODEL FOR CEMENT FILLED
ROCK JOINTS |
| SUN Futing，SHE Chengxue，WAN Litai |
| (State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei 430072，China) |
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Abstract A peak shear strength model for cement filled rock joints was proposed based on the results of theoretical analysis and direct shear tests. Firstly，three-dimensional morphology parameters of the cement filled rock joints was obtained. Then，the peak shear strength of the cement filled rock joints was calculated using the proposed model and comparisons were made between the calculated and measured results. Finally，the errors between the predicted and the measured peak shear strengths were analyzed. The predicted results was close to the measured ones. The model was found to capture well the influence of the three-dimensional morphology characteristics，the percentage of cement filling and the strength ratio of joint rock wall to cement stone. Errors were mainly caused by the inaccuracy of the proposed model and the defect of bond between joint and cement stone.
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Received: 31 October 2013
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2014, Vol. 33 
