浅析砾石土掺合料在平原型水库坝体填筑中的应用OA

Relying on the project of"Dawukou Regulating Reservoir for Water Supply in the West Line of Yinchuan Metropolitan Area",this paper makes a thorough study on gravel-soil admixture in dam fill-ing of plain-type reservoir,and discusses its applicability in dam filling by means of its physical and me-chanical characteristics.Through the particle test of different mixing ratio,the optimum mixing ratio of clayey soil to sand and gravel(volume ratio)is determined to be 7∶3,and the admixtures are compacted in the laboratory and rolled in the field.After reaching the designed compactness of 98%,the permeability test,direct shear test and compression test are carried out,and all the test results meet the design and specification re-quirements.Moreover,the shear strength index of the admixture is far greater than that of the clay soil,which is more conducive to the anti-sliding stability of the dam body.The research and application of gravel-soil admixture technology improves the construction quality,solves the problem of material source,saves the project investment,and ensures the safety of the project.The study shows that gravel-soil admixture has a good application prospect in the dam filling of plain reservoir,which can provide technical reference for similar projects.