Permeability evolution of rock-concrete interfaces in underground lined storage systems

Experimental investigation of rock–shotcrete interface damage under dynamic splitting using digital image correlation and acoustic emission

“…10 The research of the interface damage of the rock-concrete bimaterial engineering body and the interaction between the media bodies is a hot and difficult issue in the engineering field. 11,12 The current research on rock-concrete composite structures mainly focuses on the bonding properties of the interface, fracture criteria, and numerical simulation analysis of the nonlinear interface behavior. [13][14][15][16] Zhu comprehensively considered the influence of rock types, concrete strength, concrete admixtures, and interface roughness on the bond performance of the rock-concrete interface.…”

“…The tensile damage at interfaces is the main type of structure instability damage in complicated stress condition 10 . The research of the interface damage of the rock‐concrete bimaterial engineering body and the interaction between the media bodies is a hot and difficult issue in the engineering field 11,12 …”

Evolution of rock brittleness under mechanical and thermal effects

“…Shotcrete is commonly used to reinforce the tunnel walls in underground projects, in which the rock-concrete interface is the fragile part . Previous studies mainly focused on the influence of interfacial roughness and declination angle on the entire rock behaviors (Chang et al, 2018;Zhou et al, 2020;Wanniarachchi and Wu W, 2021), but few attempts have been made to reveal the related fracture mechanism and rock brittleness. Thus, it is proposed to investigate the fracture properties of rockconcrete interfaces with a single flaw under static and dynamic loading conditions.…”