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边坡内地下水位之变化是边坡安全的重要参数,但其对边坡稳定安全系数之影响却鲜少被人深入探讨。而现今监测仪器管理值大多仅以经验值代表边坡潜在危险性,且未明确指出对应的变位大小。因此,结合数值分析法和极限平衡法的优点及特性,详细分析砂质边坡的地下水位、应力、应变与安全系数之关系,探讨地下水位对砂质边坡稳定性的影响。研究成果获知各种内摩擦角不同的土壤,随着水位升高时,安全性也变化的趋势,且可以正规化参数FS/tanφ与Hw/H表达之。因此,进一步建立一个合理且可快速使用的边坡安全评估图表,以便用于砂质边坡快速安全评估,且亦可用于缺乏详细数据的现地边坡之快速安全评估,解决盲从检测之虞。
The change of groundwater level in slope is an important parameter of slope safety, but its impact on slope safety factor is rarely discussed in depth. Nowadays, most management values of monitoring instruments represent the potential risk of slope only by experience value, and the corresponding displacement size is not clearly indicated. Therefore, combining the merits and characteristics of numerical analysis and limit equilibrium method, the relationship between groundwater level, stress, strain and safety factor of sandy slope is analyzed in detail, and the effect of groundwater level on the stability of sandy slope is discussed. The research results show that soil with different internal friction angles has a tendency to change its safety as the water level increases, and the parameters FS / tanφ and Hw / H can be normalized. Therefore, a reasonable and quick-to-use slope safety assessment chart should be further developed for the quick safety assessment of sandy slope and also be used for quick safety assessment of current slope without detailed data to solve the problem of blind inspection. .