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岩石邊坡的安定分析方法

Stability Analysis of Rock Slopes

摘要


岩石邊坡的穩定分析,常因岩石存在的弱面,使力學性質與原來整塊體差異相當大,本文引用1988年shi所提出不連續變形分析(Discontinuous Deformation Analysis,簡稱D.D.A)計算塊體應力,應變及依移。由現場取得節理面參數,包括粗糙度(J.R.C),節理面單壓強度(J.C.S),基本摩擦角(φ_b)等,以Barton所推導之節理面強度關係取代原分析模式中庫倫強度關係,並在程式中建立水壓力及線性荷重作用的計算方法,分析岩坡穩定性,以驗證所擬定之分析方法的正確性。

並列摘要


In this study, theories of Discontinuous Deformation Analysis (DDA, Shi & Goodman, 1988) are employed to investigate the stability of rock slopes. Barton's shear strength formulation of the joint is employed to replace the Coulomb's formulation in the original Shi & Goodman's procedure. A field site is selected to provide the paramenters needed in the analysis. Dip and strike of the bedding plane are measured in the field. JRC, JCS, and are evaluated using the test result of the core drilled in the site. The analysis programs developed are verified with the field site.

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