| URN | etd-0722110-121716 | Statistics | This thesis had been viewed 651 times. Download 2 times. |
| Author | Hu Zheng Xinguang | ||
| Author's Email Address | No Public. | ||
| Department | hazards | ||
| Year | 2009 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 139 |
| Title | Strenght of Appraisal Adsorption Section Unsaturated Soils | ||
| Keyword | |||
| Abstract | Based on a consideration of the low cost effectiveness, this research uses conventional direct shear apparatus for proceeding direct shear test of unsaturated soil and for determining the relation between the degree of saturation and the shear strength obtained from unconsolidated-undrained tests. However, this study uses constant temperature oven to control water content of soil up to anticipant conditions. The unsaturated specimens were performed in the temperature of 50¢J and the drying time of 60 minutes. Then the sample of unsaturated soil is proceeded direct shear tests. To simulate rainfall infiltrated into the unsaturated soil, upper load cell of shear box has been modified to permeable. In other words, the water can infiltrate into the unsaturated specimen during the loading. For type 1 of soil (42% clay-size particles), this results obtained by a series of the direct shear tests show that angle of undrained friction is to equal to13.0¢Xand the undrained cohesion is to equal to31.5kPa when the degree of saturation is in the range of 85.2% to 87.8%. In addition, angle of undrained friction is to equal to 42.9¢Xand the undrained cohesion is to equal to32.2kPa when the volumetric water content is in the range of 28.0% to 28.5%. For type 2 of soil (47% clay-size particles), this results show that angle of undrained friction is to equal to46.4¢Xand the undrained cohesion is to equal to30.1kPa when the degree of saturation is in the range of 79.3% to 80.8%. In addition, angle of undrained friction is to equal to 27.5¢Xand the undrained cohesion is to equal to42.0kPa when the volumetric water content is in the range of 27.9% to 28.6%. |
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| Advisor Committee | |||
| Files | indicate in-campus access only | ||
| Date of Defense | 2010-06-28 | Date of Submission | 2010-07-26 |