Stability Analysis And Engineering Application Of Anti-dip Rock Slope

In recent years,engineering problems about anti-dip rock slopes have frequently appeared.In-depth research on the destruction mode and instability mechanism of this type of slope under different influencing factors,analyzing the change rule of stability,finding suitable engineering excavation support measures,and then guide engineering practice,is the key to solve the above engineering problems.Based on the previous research work,I classified the destruction modes of the anti-dip rock slope,analyzed the rock deformation mechanism under different failure modes,and used the FLAC^3Dnumerical simulation software to discuss the stability of the slope under different influence factors.Finally,combining with engineering examples,starting from different management ideas,proposing two support schemes.Through comparison and analysis,an optimal support scheme is provided for the project.The research work carried out and the research results obtained are as follows:（1）The destruction modes of anti-dip rock slopes are summarized.According to the different parameters of the rock mass structure plane,the failure modes are divided into five categories:shear slip,bending slip,bending dumping,massive dumping,and collapse.（2）The instability mechanism of rock formation under different failure modes is analyzed.That is,the buckling mechanism of the rock formation under the action of self-weight stress is mainly shear-tension and bending-tension deformation;the failure mechanism of sliding failure under the combined action of shear stress and tensile stress;the collapse under the action of bending-tension stress Instability mechanisms of failure and collapse failure.（3）Based on FLAC^3D,a three-dimensional numerical analysis model of anti-dip rock slope was established.In the model,the Mohr-Coulomb elastoplastic constitutive model is used for the rock mass,and Anchor bolt is simulated by double spring Cable element（4）The FLAC^3Dnumerical analysis method is used to discuss the influencing factors of the stability and destruction mode of the anti-dip rock slope.The research shows that the stability of the anti-dip rock slope has a certain correlation with the inclination angle of the rock layer,the thickness of the rock layer,the cohesion,the internal friction angle,the slope cutting angle,the length of the bolt,the anchoring angle and the anchoring position.The most important factor is anchorage position,followed by slope cutting Angle.The destruction mode is mainly affected by the dip angle of the rock formation and the thickness of the rock formation.（5）Combined with concrete engineering examples,two sets of slope governance schemes are proposed.On this basis,the numerical analysis method is used to analyze the evolution of the design scheme,and finally the optimal slope is selected from the comparison of the overall deformation of the slope,the plastic state,the stability under different working conditions and the engineering cost.Support program.