Study On The Factors Influencing The Stability Of High Fill Slope In Southwest Mountainous Airport

The southwestern region is constrained by transportation restrictions,economic development and aircraft travel is convenient.The airport has become a necessary choice for the development of the central and western regions.To build an airport in the southwestern part of the mountainous area is often facing high fill,high altitude,and climate.Due to the special conditions with complex conditions and high seismic intensity,the stability of airport high-filled slopes is facing huge challenges.The integration of high-fill airport slopes under various factors has important practical and theoretical significance.This paper analyzes and analyzes the influence and influence degree of various factors that affect the stability of high fill airport slopes based on the statistical analysis of predecessors' specific research on airports in Southwest China.This paper summarizes the current research status of the slope stability of the airport in the mountainous area of southwestern China and the actual engineering conditions,and establishes different slope heights,different slope ratios,different base slopes,different thicknesses and relative locations of soft soil layers,and different slope top and bottom widths.The high-filled slopes of the filling materials with different material properties were analyzed to determine the stability of slopes and the influence mechanism of each factor on the slopes in each case.It was found that the effect of the true thickness of the soft soil layer on the stability of the reconstructed slope depends on the proportion of the soft soil layer in the slope height of the whole reserving body.The higher the requisite volume is,the smaller the relative thickness of the soft soil layer is.The smaller the impact on slope stability,the greater the influence of the influence factors on the stability of the slope,the greater the influence of the slope ratio,followed by the internal friction angle and the cohesion in the material properties of the slope body.Heavy.The influence of the slope of the slope basement on slope stability is mainly when the height of the filling body is low.The higher the filling body is,the less obvious the change of the slope of the basement is.The slope water level distribution and slope stability under different rainfall intensity and rainfall duration are discussed for high-fill slopes.The rainfall with low intensity and longer duration is more critical for slope stability than high-intensity and short-term rainfall.Big.Analyze the dynamic acceleration response,slope dynamic displacement,etc.of slopes with different slope heights,slope ratios,and base slopes under seismic dynamics,and propose a method for determining the slope safety factor under the action of slope seismic forces.The layered seismic law of the weak layer formed by the soft soil layer with different thicknesses and different positions from the top to bottom of the filling body,the thicker the soft layer thickness of the filling body,the more severe the cumulative deformation of the slope,regardless of the relative position of the soft soil layer in the slope body.The dynamic shear stress of the slope is concentrated in the soft soil layer.The thicker the soft soil layer,the more obvious the isolation and filtering effect in the earthquake.Secondly,this paper analyzes the stability of the west taxiway slope of Kunming New Airport and the northern tip of Jiuhuang Airport on the above research results.By using static analysis,the safety reserve value of Kunming New Airport is higher,and the safety reserve of Jiuhuang Airport is higher.With low values,the overall slope of the Jiuhuang Airport is under the effect of coupling of rainfall and earthquake,with low stability reserves and low slope safety.