Shear behavior of two-order morphology in rock joints
Vol20 No.3: 845-858
【Title】Shear behavior of two-order morphology in rock joints
【Author】HUANG Man1; CHEN Xuan-nan1; HONGChen-jie2*;. LIU Dan1; LUO Zhan-you3; DUShi-gui3; WU Zao-sheng4
【Addresses】1 Dept. of Civil Engineering, Shaoxing University, Shaoxing 312000, China; 2 State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; 3 School of Civil and Environmental Engineering, Ningbo University, Ningbo 315000, China; 4 Geological Survey Engineering Department, Shaoxing Huahui Engineering Design Group Co. LTD, Shaoxing 312000, China
【Corresponding author】HONG Chen-jie
【Citation】Huang M, Chen XN, Hong CJ, et al. (2023) Shear behavior of two-order morphology in rock joints. Journal of Mountain Science 20(3). https://doi.org/10.1007/s11629-022-7571-7
【DOI】https://doi.org/10.1007/s11629-022-7571-7
【Abstract】Two-order morphology of rock joints named as waviness and unevenness can be separated bymorphology classification method,which plays a decisive role in the evolution of shear stress during the shear test. The joint morphology is obtained by using 3D printing and 3D laser scanning techniques and the joint model samples in two-order morphology are produced by cement mortar. Then, shear tests are performed under different normal loads. Results shows that the waviness is dominant in the total morphology during the shear test, and the shear contribution of unevenness mainly occurs in the climbing phase of shearing process. Comparing the failure modes of two-order morphology, waviness mainly embodies shear dilation characteristics and unevenness mainly shows shear wear characteristics. Based on this, a quantitative parameter is proposed to represent the ratio of the peak shear strength of the two-order morphology to that of total morphology. The functional relationship between the peak shear strength of total and two-order morphologies is determined, providing a theoretical method for further in-depth study on the shear strength of the interaction with two-order morphology of rock joints.
【Keywords】Rock joints; Two-order morphology; Shear characteristics; Shear strength; Damage mechanism