Meso-scale experimental investigation on anisotropy of pre-cracked slate
DAI Yonghao1，XIA Kaiwen2，3，4，YANG Diansen1，CHEN Weizhong1，TIAN Hongming1，YANG Jianping1
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. State Key Laboratory of Hydraulic Engineering Simulation and Safety，Tianjin University，Tianjin 300072，China；3. School of Civil Engineering，Tianjin University，Tianjin 300072，China；4. Department of Civil Engineering，University of Toronto，Toronto，Ontario M5S1A4，Canada)
Abstract：Slate is a heterogeneous and continuous-discontinuous material filled with micro-fractures，pores，fabrics，etc.，and shows anisotropy in geological behavior，fluid flow and heat transfer. The slate samples from the auxiliary tunnel of Jinping hydro power station were cracked with an artificial diamond saw blade of ultrathin. The failure of samples under the uniaxial compression was observed with the 3D X-ray computed tomography system which is applicable to rock and soil. The difference between the sample failures with the loading direction perpendicular to and parallel to the bedding plane was obtained and the damage evolution of slate was also discussed on the meso-scale.
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2016, Vol. 35 
