Deformation And Failure Model Test Of Bedding Layer Rock Slope

With the acceleration of the pace of infrastructure construction in China,the problem of bedding rock slopes is inevitably involved in the construction of various projects.A large amount of engineering experience shows that the instability of bedding rock slopes is one of the slopes with the largest proportion and the most harmful ones,which has caused great losses to the country's economic construction and people's lives and property.At present,due to the deformation and failure characteristics of the bedding rock slopes and the identification criteria for the instability and catastrophic evolution of the lock slopes,there is still no systematic research.Therefore,this article takes the sloping locking rock slope as the research object.Through the experiment of applying the top load,the deformation and failure process of the sloping locking rock slope under the condition of vertical load on the top is studied.Collect and analyze various data during the slope deformation and failure test,and study the model slope deformation and failure mode.The identification criteria for the instability and catastrophic evolution of the lock-up slope are proposed,and the lock-ups under the load Displacement response law and deformation failure characteristics of solid rock slopes.The main work and results of the paper are as follows.(1)Based on a typical forward-locking rock slope in a certain area of western Henan as a prototype,an indoor load test for producing a forward-locking rock slope is made,designed,and completed.(2)The test results show that by applying different levels of load strength to the top of the model slope,the deformation and failure modes of the slope are: load-induced—the top of the slope and the shoulder of the slope is stretched—the slope of the slope develops and appears.Layer-to-layer shifting—the tension cracks at the foot of the slope expand,forming through cracks,causing damage to the locking section,which in turn leads to instability and destruction of the entire slope.This also shows that the locking section has a controlling effect on the deformation and failure of the slope.(3)Use DH3821 to collect the displacement data of the model during the test,and analyze the deformation and failure laws of the slope from the perspective of displacement.The analysis results of test data show that the displacement of the measuring point on the sliding surface of the slope gradually increases with the increase of the load;when the same load intensity is applied,the maximum displacement appears in the area near the top of the slope;Shear strength is different,the shear strength at the locking section is the largest,and the slope near the top is the smallest.(4)When the rock mass is deformed and destroyed,the acoustic emission signal intensity,energy and displacement change of the rock mass are consistent with the development of time,which shows that the acoustic emission signal intensity and energy can be used as two parameters of slope rock mass monitoring and early warning index.(5)Using FLAC 3D numerical simulation technology,for the generalized bedding slope model,the deformation characteristics of the slope under different load intensities are analyzed and compared with laboratory tests.The comparison shows that the numerical analysis results are consistent with the load test results.