| With the rapid development of society,there are more and more industrial wastes,among which there are some recyclable waste resources,such as waste steel slag and tires.The waste steel slag and waste tire particles are mixed to form a new type of geotextile filler and combined with geogrid to enhance the stability of the new geotextile filler.In order to facilitate the analysis of the mechanism,in this paper,the compression deformation and shear strength characteristics of the geogrid reinforced waste steel slag were first carried out.Then the compression deformation and shear strength characteristics of the new type filler of the geogrid reinforced waste steel slag and the waste tire particles were studied.The specific capacity includes the following five aspects:First,the compression deformation properties of geogird reinforced waste steel slag were studied.A unidirectional compression test was carried out with the influence of the relative density and the number of reinforced layers.The characteristics of the compression stress-strain and compression modulus of the pure steel slag were analyzed.The compression modulus of the geogrid reinforced pure steel slag were compared with the traditional soil compression modulus,and the compression modulus of the soil was compared to analyze the engineering application level of the grid-stiffened steel slag compression modulus.Second,the compression deformation characteristics of new geogrid filler with geogrid reinforcement were studied.Based on the compression deformation characteristics of reinforced pure steel slag in the previous study,the compression stress-strain and compression modulus of the new type of geotextile filler were analyzed in consideration of the influence factors of the incorporation ratio,the relative density and the number of the grille stiffeners,and the compression modulus of the new type filler was compared with the traditional soil compression modulus to analyze the engineering application level of the new geogrid reinforced geotextile compression modulus.Third,the shear strength properties of geogrid reinforced waste steel slag were studied.Triaxial shear test was carried out on the shear strength characteristics of reinforced pure steel slag with reinforced steel slag and relative density of reinforced steel slag,and the reinforcement effect of different reinforced pure steel slag schemes was analyzed.The shear strength indexes of different reinforcement schemes were compared,and the shear strength characteristics of the traditional soil and reinforced soil were compared.It would provide reference for engineering application of geogrid reinforced pure steel slag.Fourth,the shear strength characteristics of new type of geogrid reinforced fillers was studied.Based on the shear strength characteristics of reinforced pure steel slag,triaxial shear test was carried out to consider the influence of the incorporation ratio,the relative density and the number of reinforced layers,and the reinforcement effectof the new geotechnical packings was analyzed,and the shear strength indexes of the different reinforcement schemes were compared with the traditional soil and reinforced soil.The shear strength characteristics of reinforced pure steel slag were compared,which provided flexible backfill reinforcement technology for actual projects.Finally,a new geogrid filler constitutive model with geogrid reinforcement was studied.Through the triaxial test results of the shear strength properties of a new geogrid reinforced geotextile filler,the Duncan-Chang model was used to simulate the constitutive model of the unstiffened new filler and the reinforced geotextile filler,and the Duncan-Chang model parameters were simply analyzed.The Duncan-Chang model could be used to fit the new geogrid reinforced geotextile filler with a high degree of goodness,which provided a theoretical basis for the engineering application of a new geogrid reinforced geotextile filler. |
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