岩石-混凝土界面抗剪强度劣化研究进展

Research progress on shear strength deterioration of rock-concrete interface

综述了影响岩石-混凝土界面抗剪强度劣化主要因素,包括化学侵蚀、温度效应和荷载作用,归纳了现有的岩石-混凝土界面抗剪强度宏观和细微观试验方法,并总结了考虑岩石与混凝土力学性能、界面粗糙特征、界面初始黏聚力、外加正应力的界面抗剪强度劣化模型。针对水利工程中的岩石-混凝土界面在高水力梯度作用下易发生溶蚀劣化的现象,提出了渗透溶蚀作用下的岩石-混凝土界面抗剪强度劣化机理、劣化模型和溶蚀劣化的岩石-混凝土界面损伤开裂-裂缝扩展等有待进一步研究的问题。

The main factors of rock-concrete interface shear strength deterioration were reviewed,including chemical erosion,temperature effect and load impact.The existing macro and micro test methods of rock-concrete interface were summarized.The degradation models of interface shear strength considering the mechanical properties of rock and concrete,the characteristics of interface roughness,the initial cohesion of interface,and normal external stress were summarized.Given the rock-concrete interface in hydraulic engineering is prone to corrosion degradation under high hydraulic gradients,problems including the shear strength degradation mechanism,shear strength degradation model,and interface crack propagation are proposed to be further studied.