碩士 / 國立交通大學 / 土木工程系所 / 103 / This thesis investigated the bearing capacity of spudcans with different diameter(D = 150、200 and 300 mm) penetrating submerged loose sand. Ottawa sand was used to conduct the 1g model tests at National Chiao Tung University. The spudcan experiment system consists of the vertical loading system, soil bin, and model spudcans. To simulate the offshore loose soil behavior in west Taiwan, the air-pluviation method was used to control relative density of Ottawa sand. With the slot opening 7 mm and a drop distance of soil particles 200 mm the relative density of 15 % was achieved. Allow water inflow to inundate soil specimen then use the suction pump to remove air in the soil void. The relative density of the loose submerged sand was 26 %. When spudcan penetrate the submerged soil to the depth equal to the spudcan's diameter, it was found that the surface settlement trough was symmetrical, and the trough extended to D/2 from the edge of spudcan. For the penetration of the diameter 150 mm spudcan into the submerged sand, experiment of bearing capacity was in good agreement with the bearing capacity calculated with the SNAME. For all tests of spudcan penetrating submerged sand, it was found the experimental bearing capacity increased with increasing spudcan diameter. All experimental results were equal to or bigger than the bearing capacity calculated following the SNAME. The ultimate bearing capacity estimated with SNAME was on the safe side.
| Identifer | oai:union.ndltd.org:TW/103NCTU5015029 |
| Date | January 2014 |
| Creators | Lin, Ching-Yao, 林慶祐 |
| Contributors | Fang, Yung-Show, 方永壽 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 129 |
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