| 摘要: | 傳統邊坡穩定，係以連續體理論建構邊坡切片土體平衡方程式，配合滑動面上各切片變形一致方程式，分析土體穩定平衡條件下之安全係數是否滿足規範需求，此連續體理論應用於小變形狀況，尚能滿足需求；大變形情況下，則需以不連續分析法描述變形狀態與應力向量，兩者間之分析結果尚待比較研究。
本研究參考國內外學者對於邊坡穩定分析理論應用研究案例，輔以STABL程式(Window V.1.16)與不連續變形分析法(Discontinuous Deformation AnalysisDDA)程式進行案例分析比較，希冀對邊坡穩定分析應用連續體理論與不連續體理論分析之結果，提出適當之建議。本研究以自然邊坡為探討之對象，考量 6m、8m、10m、12m等四種不同高度及1:0.3、1:0.5、1:1.0(直:橫)等三種傾斜角坡度；16°、24°、32°等三種摩擦角角度為變項，以STABL程式與DDA程式分析邊坡穩定安全係數，並與邊坡穩定分析相關法規比較。建構符合法規要求之不同摩擦角角度與傾斜角坡度下適合之邊坡高度。並以上分析結果製成表格提供設計之參考。
DDA程式分析滑動面係假設由STABL程式分析結果可得再予切割區塊而得在不考慮土壤塊體凝聚力，假設相同彈性係數與波生比情況下得結果DDA程式的安全係數較STABL程式高。STABL程式是以連續體理論求取變形。但如在考慮大變形、順向坡及破壞情况下及發生開裂破壞現象時則需以不連續體變形分析法DDA來評估，DDA程式較符合岩塊堆疊邊坡，反應現場真實面且較符合現況。
Traditional slope stability, theory is setup by the equilibrium equation of soil slope sections construction, each section with the sliding surface according to the same equations, analysis of soil under conditions of stable equilibrium factor of safety meets the design code requirements, the continuum theory is applied to small deformation conditions, and can still meet the demand ;In large deformation case, It is need to describe the discontinuous deformation analysis and stress vectors, yet the results between the two comparative studies.
This study scholars apply theory to slope stability analysis case study, supplemented by STABL program (Window V.1.16) and Discontinuous Deformation Analysis ( DDA) program for case analysis and comparison, in the hope of the slope stability Analysis of continuous theory and theoretical analysis of discrete results, make appropriate suggestions.
In this study, to explore the natural slope of the object, consider 6m, 8m, 10m, 12m, four different height and 1:0.3,1:0.5,1:1.0 (vertical and horizontal) proportion three kinds of slope angle; 16 °, 24 °, 32 ° angle for the friction angle variables to STABL& DDA program, the safety factor of slope stability relevant laws and regulations and more. Construction meet the regulatory requirements of the different friction angle of slope angle and the tilt angle of the slope under the appropriate height. And tabulate the above results provide a valuable reference. |
