(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese
Academy of Sciences，Wuhan，Hubei 430071，China；2. Research Center of Geotechnical and Structural Engineering，
Shandong University，Jinan，Shandong 250061，China)
Abstract：Based on the analysis of shear stress-displacement curve of cemented concrete-rock joint，an assumption is proposed that the shear stress of cemented concrete-rock joint is dependent on the bonding strength and the friction effect of the cohesive interface. A new model of cemented concrete-rock joint considering the bonding degradation after peak stress is therefore established. The comparison of results of back analysis using the proposed model with ones from shear tests shows that the proposed model could describe the entire process of failure of cemented concrete-rock joint. Besides，a stability analysis of the foundation of Furongjiang Bridge is carried out using the proposed model. The numerical results show that the shear stress between the skewback and the bedrock from the bridge loading is smaller than its shear strength；and the shear displacement has a very low value，which indicates a safe bridge foundation.
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2014, Vol. 33 
