Equivalent Theory Study On Mechanical Parameters Of Stratified Rock Slope

With earthquakes being at theactive stage,the landslidescaused by earthquakes were very frequent in our country, many of them were stratified rock slopes. The stratified rock slopeswereprincipallydistributed in western China, while the characteristic of layered rock sloope is that the lithologyof every layer is different.Thus, the deformation parameter of this slope is closely associated withevery layermechanical parameters.Various engineering projects of our country's western development,such as roads, dam construction, would undergo this kind of geological problem.The purpose of this study is to establish the stratified rock slopeof equivalentmechanical parametersformula, which is based on certainstratified rock slopemodel ofshaking table physicalexperiment and combined with the basic theory of mechanics, and to calculatethe proposed equivalent modelin deformation and dynamic response under static and dynamic loadby utilizing FLAC3 D.Numerical modeling is much difficult and large workload,because the amount of layersinsidestratified rock slope in actual project is heavy. The urgent problems need to be solvedare how to set up the simple and effective mechanics analysis model in case of insusceptibleoverall performance. Accurate evaluation of stratified rock slope mechanical parameters and the stabilityunder dynamical actions can provide reliable reference opinions for some engineered constructions.Some conclusions was obtained as following:(1) The study proposedthe equivalentformula of stratified rock slope mechanical parameters by analyzing the distortionalstatus of layered rock mass under stress, simplifying and discarding some secondary factors and combining the distortional characteristics, andtried to proposethe equivalentformula ofcohesion and inner friction angle.(2) Conventional triaxial rock tests was used to investigate the combination of different intensity and volume content specimen. Analyzing the two layers mechanical parameters(elastic modulus, Poisson's ratio, cohesive and angle of internal friction)of different intensity and volume contentindicated that the strength rock by increasing volumeincreases equivalent mechanical parameterswhen the intensity is at fixed value;but fortifying intensity increases equivalent mechanical parameters when the volume is at fixed value, which is in accordance with theoretical formulas.(3) Utilizing FLAC3 Dsoftware to evaluate the stress and strain rule of stratified rock slope's physical test modelunder the self-gravity effect, and comparing the results withthat of equivalentmodel, itrevealed the vertical displacement of stratified rock slope's physical test model under self-gravity was consistent withequivalent model. There are some errors between the vertical displacement in slope interior and slope surface, but the basic change rule is consistent; stress value at the stratified layer is vast difference with equivalent model,the stress error is smallerfarther away fromlayer, and equivalentformula was applicative in vertical displacement of the slope,unapplicative for the equivalent level of stress.(4) Furtherapplying the mechanical parameters of equivalentformula to dynamic response law of slope, althoughthere are large differences at the layer surfaceof dynamic responsediscipline, dynamic response rules ofequivalent model is consistent with stratified slope. The study revealed that equivalent model is more accurate when calculating dynamic response ofslope displacement, indicated that the mechanical parameters of equivalentformulaproposed bythe study can succinctlyanalyze the dynamic response law ofstratified rock slope.