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水是边坡失稳的主要诱发因素之。地表水对土质边坡的影响主要是冲刷作用和渗透作用;地下水对边坡的作用主要表现在物理作用、力学作用以及化学作用三个方面。通过诸永高速公路公盂互通A匝道滑坡防治实例,计算出在考虑地下水的状态下,潜在滑坡HP边坡稳定系数K=0.900,边坡处于极限平衡状态,而在不考虑地下水的状态下,潜在滑坡HP边坡稳定系数K=1.345,边坡处尚于稳定状态。根据边坡的具体情况,提出应对边坡地表水及地下水进行有效的阻挡、疏导等预防措施。
Water is the main inducing factor of slope instability. The influence of surface water on soil slope is mainly erosion and infiltration. The effect of groundwater on slope mainly manifests in three aspects: physical action, mechanical action and chemical action. Through the examples of A ramp landslide prevention and control in Gongyou Interchange on Zhuyong Expressway, the slope stability coefficient K of potential landslide HP = 0.900 is considered when the groundwater is considered, and the slope is in the state of limit equilibrium. Under the condition of not considering groundwater, Potential landslide HP slope stability coefficient K = 1.345, the slope is still in a stable state. According to the specific conditions of the slope, it is proposed that the surface water and groundwater should be effectively blocked and defused.