Failure Mechanisms of Shallow Tunnel in Sandy Ground
| Autor: | Liming Li, Bartlomiej Dziuban, Hoe I. Ling |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Centrifuge
Test setup Environmental Engineering 0211 other engineering and technologies Transportation 02 engineering and technology Ground failure Geotechnical Engineering and Engineering Geology Overburden pressure Horn (acoustic) 021105 building & construction Geotechnical engineering Actuator Water content Geology 021101 geological & geomatics engineering Civil and Structural Engineering |
| Zdroj: | Transportation Infrastructure Geotechnology. 5:318-331 |
| ISSN: | 2196-7210 2196-7202 |
| DOI: | 10.1007/s40515-018-0062-1 |
| Popis: | The deformations and failure mechanisms of the tunnel face in a shallow ground were studied using a geotechnical centrifuge. The test setup comprised of a half section of tunnel of diameter (D) of 10 cm with a movable rigid face plate, both created using 3D printing technique. The plate was attached to a displacement-control actuator which moved into the tunnel to generate ground failure. In the testings, the ground of Nevada sand was prepared in a rigid test box to render different shallow burial depths C simulating C/D ratios of 0.3, 0.5, and 0.7. Dry, moist (5% water content), and saturated conditions were considered. The transparent wall of the test box allowed direct visualization and recording of deformations, and subsequent image analysis. The C/D ratios and water contents affected the vertical stress distribution in the ground. The observed failure surfaces were comparable with the mechanisms proposed by Horn. |
| Databáze: | OpenAIRE |
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