| Summary: | 碩士 === 中原大學 === 土木工程研究所 === 103 === This study investigated the effect of surface roughness on the disc shearing behavior of sand. The roughness of the disk and the sand surface friction characteristics may be related.
In this study, there are four different particle characteristics of soil samples which are MaiLiao sand, Ottawa sand, MaiLiao sand mixed with 10% of Musco fine sand and Ottawa mixed with 10% of Musco fine sand. The inner diameter of test tank is 600 mm and the disc is 150 mm, the disk roughness R_a are 1.0~1.2μm and 1.2~1.6μm, the thickness of soil samples is 75 mm, the relative density of the initial soil was 35%. In this test applied a static loading of 11 ~ 42 kPa, the angles of disc shearing was 5 ° and 15 °. To measure the amount of Disc settlement by applying a static load and rotate so that the specimen disc compression. After the above test, another static loading test was made in which specimens was in the center to investigate and improve the effect of soil density Disc Shearing.
The test results showed that the change in the relative density increases with static load, but the effect will be improvement due to the different characteristics of sand particles. Under static load and disc shearing of 11~42 kPa, the roughness of the disk larger improvement was better, the effect of improvement is related to the roughness of the disk.
|
|---|
