Numerical Analysis of Bamboo Slope Protection Under Dynamic Loading
摘要
Landslides are often triggered by earthquakes, where many traditional slope protection measures fail. Ground accelerations reduce the shear strength and effective stress of soil and can sometimes amplify shaking when they align with the natural frequency of the slope, resulting in catastrophic failure. While eco-friendly solutions like vegetation have proven effective in the literature, they require time to establish. This study numerically evaluates the potential of bamboo as an intermediate solution until long-term measures are fully developed. It primarily focuses on the mechanism of bamboo slope protection under dynamic loading scenarios. Firstly, finite element modeling is employed to conduct a safety analysis to determine the optimal configuration of bamboo installation such as spacing and embedment lengths. The optimal dimensions proposed in this study can be applied in practical design. Secondly, the research evaluates the displacement and slip surface patterns of several slope models by simulating ground accelerations based on two historical earthquakes. Finally, a sensitivity analysis is presented with varying shear strength parameters of soil found in the study area. Bamboo poles, along with supplementary measures such as head beams and concrete rings, were found to significantly enhance slope stability, particularly for steeper slopes. However, the effects of soil cohesion and slope height on performance vary depending on the nature of the ground acceleration.