Study On The Effects Of Earth Fissures On Deformation And Failure Of Airport Buildings

Ground fissure is a kind of slow and progressive geological disaster caused by internal and external geologic agent and human activities,which will bring varying degrees of damage to the ground and buildings,seriously affect the stability and normal use of structures,and also restrict human engineering activities.In recent years,the serious ground fissure has been found during the use of the T2 terminal of Beijing capital international airport,which has affected the normal use of T2 terminal and the operation safety of aircraft.Therefore,it is particularly important to find out the activity characteristics of ground fissures in this region and the influence mechanism of ground fissures on Beijing capital airport,and to solve the engineering harm of ground fissures in the airport.Based on the collection and collation of relevant literature and survey data,this paper takes the ground fissure of Beijing capital international airport as the research background,first introduces the basic characteristics of the ground fissure in Beijing area,and investigates the ground fissure disaster situation of Beijing capital international airport on site.Then,take it as the research object,through the largescale physical model test simulates the activity of ground fissures,and focuses on the influence of ground fissures on the underground tunnel between T2 and T3 terminals and the surface runway and cover plate,revealing the effect of ground fissures.The settlement rules of the ground surface,the law on the change of the stress of the stratum,the rules of deformation and breakage of the roadway lining and the influence of the ground fissure on the surface runway and underground roadway and the extent of damage provide a basis for the airport to deal with ground fissure disasters.Finally,the finite difference software FLAC3 D is used to establish the numerical model of the ground crack and roadway structure,as well as the surface runway and cover plate.Through numerical calculation,the stress and deformation of the roadway structure,runway and cover plate under the action of ground crack activity are analyzed,and the model test results are compared to optimize and supplement the model test.The research results of this paper have important guiding significance for the prevention and treatment of ground fissures in Beijing capital international airport,and also provide reference value for the prevention and treatment of ground fissures in other areas.