On the Permanent Depressions of Granular Materials under Static Repeated Loading

静的繰り返し荷重による粒体層の永久沈下について

On the Permanent Depressions of Granular Materials under Static Repeated Loading

Creators Mogami Sachio

Creators Hasegawa Atsushi

We carried out the laboratory model tests on the permanent depressions under static repeated loading (0-pkg/cm). Primary experimental conditions are as follows : The heights of the gravel layers are three kinds of 5,10,15cm and the diameters of gravels are 2-5mm, 5-10mm, and 10-15mm. The subgrade is made of concrete. We used wooden moulds (10×17cm, 13×22cm, 22×37.4cm) around the gravel layers and two kinds of loaded plates (7.5×12.75cm, 10×17cm.) Acting loads are 100,200,and 300kg. Some examples of the experimental results are shown in Fig. 1-fig. 3. In these cases the relationship between the permanent depressions and repeated intensities are generally expressed as follows : [numerical formula] (1) where, y=cumulative permanent depressions after n times repeating, p=mean load intensity, A, B= characteristic values of gravel layers, Determining the values of A and B from the experimental results we obtained the results as shown in Fig. 4-Fig. 7. We wish to proceed the experiments by changing the experimental conditions.

[ISSN]0372-7661

[NCID]AN00244228