Studying On Loess Filling High Slope Deformation And Stability

In recent years,a large number of airports in the renovation,most of them relates to the mountain airport in complex geological conditions of high embankment slope,slope stability and settlement is the key issues for the project.In this paper,the Lvliang airports high slope deformation and stability filling on deep loess ramp foundation as engineering background,similar to the design,control and provide the basis for reference.Based on the available literature,combining Lvliang airport site monitoring,numerical simulation,reinforced trial,the following studies:Through on-site monitoring data and to consider layered filling simulation,research Lvliang Airport slope deformation and stability of the situation,and monitoring and numerical results were compared;Study on the factors(filling body geometry,compaction,infiltration)of high slope stability influence on the slope;With reinforced triaxial test,combined with numerical calculation of reinforced slope,discussion on the strength parameters of large reinforced triaxial tests was directly applied to the design of reinforced slope.Main achieved the following:(1)Lvliang airport safety factor and potential sliding surface have a small difference between layered filling and a filling:A filling an average safety factor of 1.305,layered filling of 1.319,a difference of 1.08%,show Lvliang airport filling high slope in a stable state,meet the safety requirements specification,can be used once or stratified analysis filling high slope stability.Deformation results have difference between layered filling and a filling vary greatly,Deformation results of field monitoring data are more consistent with a layered filling,Stratified analysis suggested to analysis filling high slope deformation.(2)"Critical Filling Width" cause the safety factor and failure modes of mutation:When filling width larger than a certain value,which is filling the role of the body together with the original foundation of stability,when filling width smaller than a certain value,which is the original foundation of their own stability.Lvliang airport embankment "critical filling width"for the 250m,the best fill slope ratio of 2.0.(3)High slope using geotextile reinforcement,fillers nature worse,increase the safety factor the more obvious;shall not exceed the length of the reinforced potential sliding surface,reinforced spacing of not more than 1m.(4)Experimental reinforced one,two,three four after strength parameters used to calculate the factor of safety equivalent to the design of reinforced slope length 120m,vertical reinforcement spacing were 4m,2m,1.5m,1m calculated at slope safety factor.To meet regulatory requirements(safety factor greater than 1.3),reinforcement spacing should be required to 0.5m.