碩士 / 中原大學 / 土木工程研究所 / 82 / Ground settlement is an unbound sinking behavior which is caused partly by over-pumping of ground water from depth. During the last decade, settlement occurs along the coastal region in Southwest Taiwan, including Pingtung,Yunlin, Chiayi and Changhua hsien where many fish farms are cultivated.
Researches about ground settlement in this country are mostly focused on the interaction between ground water over-pumping and land-sinking, while the problems caused by surface loading are not well studied. Thus, this study use undisturbed specimens to measure the consolidation properties of soils by means of conventional one-dimensional consolidation test meanwhile and to evaluate the effectiveness of using surcharging method to reduce long-term settlement. Moreover, this study includes taking SEM of undisturbed specimens. Finally, FLAC is used to simulate one-dimensional consolidation test.
According to the results, the studied areas have very high potential for large settlement, and the higher surcharging ratio is, the longer time it takes for the secondary compression to reappear. From the microphotographs, it's obvious that the soil grains are rearranged to a dense state after consolidation, and this proves that the soils have high compressibility. From simulating one-dimensional consolidation test, FLAC with modified soil properties can accurately predict the consolidation behavior of soil.
| Identifer | oai:union.ndltd.org:TW/082CYCU3015005 |
| Date | January 1994 |
| Creators | 黃雲漢 |
| Contributors | 馮道偉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 106 |
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