Experimental Study On The Formation Process Of Damaged Boundary Of Anti-dip Rock Slope

The destruction boundary has a crucial impact on the stability of the slope.The formation and development of the destruction boundary of the anti-dip rock slope is a scientific issue worth studying.In this paper,the location of the failure boundary is determined by centrifuge test on the anti-dip rock slope.At the same time,the deformation law and earth pressure of the cracks at the failure boundary are analyzed and summarized,and the formation process and development law of the failure boundary are revealed.Finally,PFC is used.The numerical simulation software simulates the centrifuge test,focusing on the evolution of the contact force,displacement,velocity,stress and kinetic energy during the formation of the destructive boundary.The main research contents are as follows:(1)A large-scale centrifuge model test was carried out on the anti-dip rock slope.The main contents include the determination of similarity relationship,the design of model structure size and similarity relationship,the selection and ratio of similar materials,the selection and placement of sensors,the centrifuge A series of work such as the determination of the loading scheme,the production and assembly of the test model,the test process,etc.,finally established a set of design ideas suitable for the large-scale centrifuge model test process of the anti-dip rock slope.(2)A centrifuge model test was carried out on the anti-dip rock slope with prefabricated cracks,the strain response of the prefabricated cracks at each stage of loading was analyzed,the location of the damage boundary was determined,and then the deformation law and The earth pressure is analyzed and summarized to reveal the formation process and development law of the destruction boundary of the anti-dip rock slope.The results show that the formation process of the broken boundary is divided into two stages: anti-bending and dumping.(3)The PFC particle flow numerical simulation software was used to invert the failure mode of the anti-dip rock slope,and compared with the centrifuge model test results.The results show that the numerical simulation test results are basically consistent with the formation process of the centrifuge model test failure boundary.(4)The parameters of contact force,displacement,velocity,stress and kinetic energy during the formation of the destruction boundary are monitored through the measurement circle and sphere particles set on the numerical model,and the specific research and analysis are carried out.The results show that the destruction boundary is different The parameters of the parts are obviously different.