振動による粘土けん濁液の砂層への浸透 : 土,岩石,コンクリートのレオロジー

概要

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It is known that the ejection of subgrade soil causes many troubles on keeping concrete pavement of load and ballast of railway. Such ejection occurs under the following conditions that the distribution of the grain size of subgrade soil is in a certain range and at the same time, the water content is beyond a certain limit. A sand layer is inserted between the subgrade and concrete slub or railway ballast in order to prevent this efection. In static or dynamic conditions, several experiments were studied on the assumption that the ejection through ballast is the process of intrusion of clay suspension into a sand layer. Clay suspension gets high potential energy, that is converted form vibrating energy, consequently the suspension will percolate in to the subballast where the energy is low. Such a process of seepage of suspension is expressed by the following formula z axis (vertical axis) (<npart>p)/(<npart>t)α(<npart>^2p)/(<npart>^2z^2) Where p is effective pressure (intergranular pressure) of injection, t is time elapsed and α is the coefficient of percolation.
社団法人日本材料学会の論文
1963-05-15