Decreasing slope angle and slope height increases the slope factor of safety and can change the shape of likely slope failure. The increase in the factor of safety is at different rates, which can depend on soil type and slope geometry. Understanding the relationship between the slope height and angle decrease with the increase in factor of safety is vital to implement an efficient method of increasing factor of safety for slope stability problems. In addition, the shape of slope failure has to be observed thoroughly, not to increase the sliding mass of soil for a likely slope failure, even though the factor of safety has increased. Three homogeneous slopes of different soil characteristics were analyzed several times by changing the slope height and angle to determine the factor of safety. The shape of failure was also observed and recorded for each slope height and angle decrease. The analysis results indicated that decreasing slope angle increases the factor of safety nearly linearly while a decrease in height increases the factor of safety at a parabolic rate. Slope height decrease increased the factor of safety at a higher rate for the clay soil while slope angle decrease increased factor of safety at a higher rate for sandy soil compared to the other types of soils considered. The toe slide was observed in clayey and sandy clay soils at higher slopes while the base slide was observed at slopes whose height is less than 2 m. The slope slide was dominant on sandy soil at different slope heights and slope angles. While the factor of safety of slopes had increased with slope height and angle decrease, the rate of increases and thus the efficiencies are different which depended on the type of soil and geometry of slope. The shape of failure also changed which might increase the sliding mass of soil. This can be risky if slope failure occurs due to unforeseen events. Using the slope height and angle decrease methods for slope stabilization should be thoroughly investigated to choose the most efficient method and also should be checked not to increase the sliding mass of soil for a possible slope failure.

中文翻译：

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基于强度折减法的边坡高度和角度对边坡安全系数和破坏形态的影响研究

减小坡度角和坡度高度会增加坡度的安全系数，并可能改变可能发生的坡度破坏的形状。安全系数的增加速率不同，这取决于土壤类型和边坡几何形状。了解斜坡高度和角度随安全系数增加而减小之间的关系，对于实施一种提高安全系数来解决边坡稳定性问题的有效方法至关重要。此外，即使安全系数增加了，也必须彻底观察斜坡破坏的形状，而不是增加可能发生斜坡破坏的土壤的滑动质量。通过改变边坡的高度和角度，对三个具有不同土壤特性的均质边坡进行了多次分析，以确定安全系数。还观察到破坏的形状，并记录每个斜坡高度和角度减小的情况。分析结果表明，减小的倾斜角几乎以线性方式增加了安全系数，而减小高度则以抛物线速率增加了安全系数。与其他类型的土壤相比，坡度高度降低对粘土土壤的安全系数更高，而坡度角度降低对沙质土壤的安全系数更高。在较高坡度的粘土和砂质土壤中观察到了脚趾滑坡，而在高度小于2 m的坡度上观察到了基滑坡。在不同的坡度和坡度下，滑坡在砂质土壤上占主导地位。边坡的安全系数随着边坡的高度和角度的减小而增加，增加的速度，因此效率是不同的，这取决于土壤的类型和坡度的几何形状。破坏的形状也改变了，这可能会增加土壤的滑动质量。如果由于不可预见的事件而发生边坡破坏，这可能是有风险的。应该仔细研究使用斜坡高度和角度减小方法来稳定边坡，以选择最有效的方法，还应检查其是否增加了土体的滑动质量，以免发生可能的边坡破坏。