Three-dimensional Visual Reconstruction And Damage Study Of Water-Rock Interaction Based On CT Scan

Water-rock interaction is a scientific subject that is often encountered in the engineering field, especially the rock engineering disaster,mostly because of the water-rock interaction,which causes the damage to the rock mass to cause the disaster, such as slope engineering,water conservancy project etc.In order to find out the damage and damage law of sandstone specimen in water-rock interaction process,the damage test of sandstone specimen was carried out by means of CT scanning technique combined with triaxial loading equipment and self-developed infiltration water pressure device;Verification test by MIMICS 3D visualization reconstruction software;The volume V and surface area S of the reconstructed sandstone samples were obtained by 3D visualization reconstruction. The CT area cross section A was derived from the surface area S, and the CT damage was obtained from the CT scanning test. The damage and damage law were studied from the microscopic and macroscopic angles.The main conclusions are as follows:(1) The damage test of the sandstone specimen is carried out, and the appearance of the sandstone specimen after the disassembly is taken in different directions. Then, the 3D reconstruction of the last CT scan sandstone specimen is carried out. The three-dimensional reconstruction and test appearance The microstructures of the sandstone samples were observed by three-dimensional reconstruction, and the initial microcracks appeared in the surface of the sandstone samples. Then, a small amount of cracks were formed in the vicinity of the initial microcracks. The initial microcracks also appeared in a small amount of new microcracks.(2) At the mesoscopic angle, the sandstone specimen is used as the damage group in the adjacent CT scan interval. When the CT value is taken as the meso-damage variable, the sandstone specimen undergoes a linear initial compaction stage and has a linear degree The sandstone specimen is subjected to a linear initial compaction stage and a certain degree of pressure to a certain extent, and the exponential signs of damage and damage are obtained after the cross-sectional area A, which is based on the three-dimensional visual reconstruction, is used as the meso-damage variable.(3) Based on the three-dimensional visual reconstruction, the reconstructed volume V and the reconstructed surface area S are taken as macroscopic damage variables from the macroscopic angle. The reconstructed volume V and the reconstructed surface area S are taken as macroscopic damage variables. After the initial linear compaction stage, after a certain degree of pressure, there are signs of damage to the index.(4) Sandstone samples in water-rock interactions are more likely to cause signs of damage and damage.