| Summary: | 碩士 === 國立屏東科技大學 === 水土保持系所 === 102 === This study on the slate creep behavior in Gaoping River was performed by the discrete element method. In this paper, Based on the rockmass creep patterns by Chigira (1992) and Richard (2000) and the field observation, the essential boundary and material condition and the mechanism of the creep are studied by UDEC simulation. The bending fold of a creep rockmass occurs frequently in the lower angle jointed slope while the numerical simulation obtain the similar result. Furthermore, the creep pattern converted as under the different materials and terrain conditions. The results shows when the joints inclination angle less than 45 degrees, caused by gravity, the rock mass yields the bending fold type of creep; On the other hand, for the one’s inclination angle is greater than 45 degrees, the rock mass yields the topple on the surface of slope.
In the weak rocks with strong joints condition, the rock mass will yields a bending fold; next, in the strong rock with weak joints condition, the rock mass yields a block sliding; oppositely, in the weak rock with weak joints condition, the rock mass will slide and bending along weak plane; last, the anti-dip slope with steep angle in the strong rock with weak joints, The rock mass experiences the topple and falling down to slope in block.
River erosion effect is also studied by cutting the foot of river bank in several slopes in numerical model. The results show the multiple small folds occurred from the toe to top of slope under the 30 degrees of river bank. Moreover, the discrete block sliding on surface of slope, and the squeezing at toe of slope are occurring under the 45 degrees of river bank.
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