Study On Strength Characteristics And Road Performance Of Stabilized Laterite Gravel

In Congo,Africa,there is a natural mixture of cohesive soil and crushed gravel,often called laterite gravel.Due to the lack of rock resources and the shortage of materials in Africa,if laterite gravel is used as the base of Road(bottom),it will bring great technical,economic and environmental benefits.Therefore,based on the Congo area along the road of Quito and Guilin area gravel gravel red clay as the research object,through a series of indoor soil test and numerical simulation analysis,comparative study of the engineering properties of gravelly laterite at home and abroad,Congo area improved strength and clay gravel clay gravel pavement structure stress analysis,the main work includes the following aspects:(1)the gravel engineering characteristics of laterite gravel and Guilin in Congo area.Based on the engineering properties of gravel clay at home and abroad,carried out a series of basic physical and mechanical test,physical and mechanical parameters of gravel clay at home and abroad,and conduct research and analysis of the physical and mechanical parameters of correlation,regression equation between domestic and foreign laterite gravel all physical and mechanical parameters of the fitting,feasibility analysis of domestic and foreign laterite gravel road.(2)experimental study on strength characteristics of improved laterite gravel.Lime and cement as modifier,modified Congo clay gravel,through three axial compression test(CU),was studied in different proportion,under different confining pressure,strength index C,the changes of shear modified clay gravel,and the shear strength index between the fitting formula are different content conditions,to find out the best dosage;and analysis of modified lateritic gravel strength formation mechanism for highway,Quito(bottom)to provide reference for the design and construction of grassroots.(3)Stress analysis of pavement structure of laterite gravel base.Based on the FLAC3 D finite difference software,the three-dimensional model of the laterite-gravel basement and subsoil was established.Taking the pavement structure deflection,the bottom tensile stress and the maximum shear stress as the control objects Factors,Comparative Analysis of Mechanics Response of Improving Laterite Gravel Base.