灌浆节理压剪峰值抗剪强度数值试验研究

对灌浆锯齿形单节理在压剪情况下的变形特性及峰值抗剪强度进行了数值试验研究.首先对数值模拟中涉及的模型网格、材料力学特性及接触面模拟问题进行了分析;在此基础上,对数值试验的精度和正确性进行了检验;最后,对灌浆锯齿形单节理在圧剪情况下的变形破坏进行了数值试验,重点针对灌浆充填度、起伏角和法向压应力等因素对于灌浆节理峰值抗剪强度的影响进行了分析,提出考虑各因素综合影响的抗剪强度经验公式,成果对进一步研究实际灌浆节理的抗剪强度具有理论指导意义,对实际工程也具有参考价值.

Numerical test study of peak shear strength of cement-grouted joint under compression shearing

The deformation characteristics and peak shear strength of the cement-grouted saw-shaped single joint under compression shearing are studied by numerical method.First of all,the FEM mesh,material mechanical properties and contact imitation problems with respect to numerical modeling are analyzed.Then the accuracy and correctness of the numerical test are checked.Finally,the deformation and failure process of the cement-grouted saw-shaped single joint under compression shearing are tested by numerical method,with the emphasis being on the research of the influences of the filling degree of cement,undulation angle of the joint surface and normal stress on the peak shear strength.An empirical function of the shear strength considering the three influence factors is proposed,which is useful to guide the further research on the shear strength of the cement-grouted real joint and also has referential value to practical engineering.