Analysis Of Landslide Stability And Prevention Measures Of Yang Ba Grain Station In Nanjiang County Sichuan Province

The collapse of Brittle rock is a kind of global mountain geological disaster,which has the characteristics of universality,concealment,rapid,destructiveness,Highly disaster-causing,etc.Brittle rock is a structure which is cut by several groups of rock structure on steep cliffs or steep slopes under the action of inducing factors such as gravity and seismic water.And the formation of instability and motion is the main form of slope dynamic geomorphological process.Therefore,it is of great significance to take a deep look into the factors influencing the formation of the collapse of the rock,the characteristics of its classification deformation,the characteristics of its stability.Besides,at no time should we underestimate the power of the engineering prevention and control of the collapse of the unstable rock.This paper takes the collapse of the unstable rock of Yang Ba grain station in Nanjiang County as the research object,in the following aspects of the study:(1)Through on-site investigation and analysis of the preliminary data,to identify the meteorological hydrology,topography,stratigraphic lithology,geological structure,hydrogeological conditions,engineering geological conditions and other characteristics of this area.The main factors affecting the collapse of the unstable rock in the study area are identified,which provides the basic information for the following research work.(2)Through on-the-spot investigation,the distribution range of dangerous rock mass in the area was statistically studied,including the size,number and deformation characteristics.(3)On the formation and development characteristics of the unstable rock mass were analyzed,and the developmental factors and deformation instability patterns were studied and classified.(4)Statistical analysis of the structural surface of the unstable rock mass was carried out,the isodensity map of the fracture pole and the rosette map were made,and the stability of the unstable rock mass was analyzed by means of the equatorial projection.(5)In the study area,a movement model of falling rock is established to simulate the trajectory of falling rock,falling distance,jumping height,impact kinetic energy,etc.,providing basis for subsequent prevention measures.(6)The stability of colluvium is evaluated by using correction method.(7)The control measures of unstable rock masses in the study area were studied,and the following measures were finally determined :The periphery of the dangerous rock mass and the ridges on both sides will be built to cut off drainage ditches according to the actual topography.Remove the loose unstable rock mass on slope.Grouting and masonry protective surfaces of some unstable rock mass fractures;Build passive mesh protection below the slope.