| 姓名 | 林佳儀(Chia-Yi Lin) | 電子郵件信箱 | E-mail 資料不公開 | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 96學年第2學期 | |
| 論文名稱(中) | 地工格網加勁土壤在邊坡穩定工程之應用研究 | |||
| 論文名稱(英) | The Effects of Geo-grid Reinforced Earth on Slope Stability Analysis | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外完全公開 | |
| 論文語文/頁數 | 中文/94 | |||
| 摘要(中) |
本研究採用PET軟式地工格網與砂頁岩互層之崩積土壤，模擬不同降雨強度之土壤含水量進行地工格網與土壤介面直剪試驗，以及在大型傾斜儀剪力盒中分別將格網以與剪切面夾角為30°、60°、90°，模擬加勁複合土壤於破壞時的摩擦角，探討地工格網於不同含水量土壤中之力學行為，並且以穩定分析軟體STEDwin及MSEW分析其對邊坡穩定安全係數的影響。 研究結果顯示，在大型傾斜儀試驗中，當格網與水平夾角為30°時其破壞角受含水量之影響較小，破壞角介於32°∼42.5°，衰減率約5.5%∼28.9%；在地工格網與土壤的介面直剪試驗中，乾土狀況下介面摩擦角δ約為39.5°，隨土壤含水量增至4%、7%及11%時，δ依序分別衰減為20.5°、23°及26.5°；以STEDwin作案例穩定分析，含水量對加勁邊坡安全係數之衰減率達6.1%∼32.5%，以MSEW分析，加勁邊坡之水平滑動安全係數衰減率達37%∼71.4%。 |
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| 摘要(英) | The
research was conducted to investigate the interactive properties
between soft PE geo-grid material and the alternative shale
deposits under 3 simulated rainfall intensities which include
w/c=4% (ordinary moisture condition), 7% (average rainfall) and
11% (storm condition), with contrast to the dry condition at
w/c=0%. A large scale inclined direct shear device was used with the geo-grid at the angle of 30, 60 and 90 degree with respect to the shear plane to investigate the internal frictional angle at shear failure within the reinforced earth mass under the 3 selected simulated rainfall intensities. In addition, a traditional direct shear device was used to determine the interface frictional angle between the surface of the geo-grid and the reinforced earth. With the use of the laboratory test results, the slope stability analysis software STEDwin and MSEW were utilized to study the effects of (1) the placements of geo-grid at various angles within the soil mass, and (2) the simulated rainfall intensities, on the safety factor of stability of shale slopes which may be often encountered in Taiwan. The results of the study revealed that the reinforced earth with geo-grid at 30 degree has the internal frictional angle of 32-42.5 degree at shear failure which is least influenced by the water content. The internal frictional angles have a reduction rate of 5.5%-28.9% for the 3 selected rainfall intensities compared with that of dry condition. In addition, the interface frictional angle between the geo-grid and the soil mass is 39.5 degree at dry condition and is decreased to 20.5, 23, and 26.5 degree for w/c=4,7, and 11% respectively. For the stability analysis, the results of a reinforced earth slope case study revealed that increase of water content from 0% to 11% as simulated may reduce the safety factor of the slope stability from 6.1% to 32.5% using the STEDwin software, while the safety factor of lateral sliding for the reinforced earth slope may be reduced from 37 to 71.4%. The results of the study provide useful information for practical applications in case the reinforced earth with PE geo-grid is used for the slopes. |
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| 口試日期 | 2008-07-30 | 繳交日期 | 2008-08-22 | |