Study On The Mechanical Reliability Constraint Of Permeable Apron

The airport apron which is an open flat terrain can provide a good condition for the safeskiing and taxiing of planes, the apron pavement is rigid pavement in traditional, which isdense and waterproof, which can make the pavement with enough strength and stiffnesseffectively. However, the rigid pavement structure also given rise to a series of problems, theoperation of airport can be influenced by the water forming in the heavy rain. The passengershave to wade to go aboard within a certain period of time after rain. What is more, a lot ofrainwater is discharged to the place outside the airport, as a result, a local heat island effectcan be formed for the soil with insufficient moisture.In order to overcome these problems, it isneeded to improve the permeability of the pavement, which can do good to get the best resultsthat the operation environment can be improved and energy-saving emission reduction.The reliability of the permeable pavement structure is taken as the research objectivesand taking the hinge paving permeable pavement structure system is taken as the researchobject,the method which theory analysis and finite element numerical simulation arecombined with engineering experiments are used in research, the influence regularity that thestructure stability of permeability pavement has been researched under different cushion layerand base structures. A series of simulation analysis and experimental researches have beencarried on to study the bearing capacity including the different forms of sand and gravel basewith moisture condition, fifty-four kinds of experimental combinations which contains threedifferent graphic size, three kinds of ratio of width to thickness, three different loadinglocation have been researched, The water logged stabilization of hinge paving permeablepavement has been analyzed，which can reflect mechanical synergistic effect and deformationcoordination effect, which have determined the ultimate load under critical loading position,the critical deformation and the most optimal width-thickness ratio of different modelpermeable pavement plate.Finite element numerical analysis and engineering measured results show that, the sandrate exists a threshold of70%,when the rate is greater than this value,the sandy soil has goodfull water stability and the bearing capacity loss rate is smaller, when the sand has been usedas sugared. The optimized gravel base materials are4.75-31.5mm, that gravel gradation has high strength and good permeability, which can improve the bearing capacity of the pavementstructure effectively. The most dangerous loading position of the paving permeable concretepavement structure is the corner. Suggestions that selecting corner load as the design ofcritical load of paving permeable pavement. The models which contain200mm,330mm and500mm have smaller loss of ultimate load and the critical deformation degree when thewidth-thickness ratio is4, with good reliability and stability, these models can be well suitablefor the area with fully water environment.The permeable pavement structure with330-4combination can withstand B737series machines using load parking requirementsin in thecondition of full water These conclusions have provided reliable optimization parameter andtheoretical basis for the hinge paving permeable pavement structure in the design andapplication of the apron structure.