Research On The Stability And Excavating Deformation Of Consequent Bedding Rock Slope Under The Hydraulic Action

Recently, as the development of expressway and railway in western mountain area of China, more and more landslide disasters are appeared during the construction of engineering, and it's caused great harm to the engineering construction, economic construction and the safety of people's lives and property. As one kind of rock slope, consequent bedding rock slopes are widely distributed in China. Consequent bedding rock slopes with the characteristics of fragile engineering geological conditions and poor stability, it's very incidental to be destroyed under the action of rainfall, blasting, earthquake and so on. The stability of consequent bedding rock slopes have been plagued engineering for many years. Now, the failure mechanism of consequent bedding rock slopes under the hydraulic action are unclear and the eccavation deformation are seldom researched. To a great extent, the design of slopes are depond on the desinger's experience, which set up a greater risk for stability. So, research on the stability and excavating deformation of consequent bedding rock slope under the hydraulic action has great significance for the optimization design and stability strengthened of slope.Based on the Yan Ru expressway, through the engineering geology research, the failure modes of consequent bedding rock slope is divided into eight kinds by the mechanical of failure. The mechanical parameters attenuated law of rock and structural under the hydraulic action are studied through laboratory experiments and the results are reliable basis for the stability evaluation of consequent bedding rock slope. Based on Darcy's law, the stability of slope under the rainfall infiltration conditions is researched and the calculate formula of penetration and haulage of slide face are derived. The mechanism of bedding sliding is analysied and the instability criterion is researched. Analyse the excavate deformation mechanism of consequent bedding rock slope and introduce the characteristic of unloading rock mass mechanics. Based on elastic and law of conservation of energy, derivate the calculate formula of unloading rebound deformation and bedding sliding deformation. Through the large finite element software ADINA, deformation of slope excavation is calculated. At the same time, by the two dimensions limit equilibrium software Slide, the safety factor of natural state and soaking state are calculated. Finally, through the deformation monitoring of slope excavation, measure the change law of horizontal displacement and verifying the results by finite element method. The results show that the finite element numerical which based on the unloading rockmass mechanics is feasible.The results of this paper, announced further the excavating deformation and failure mechanism of consequent bedding rock slope under the hydraulic action. The results provide significant guidance for the design, construction and reinforcement of consequent bedding rock slope.