高原地区抗滑桩边坡稳定性分析

由于实际环境的复杂性与多变性，边坡自然沉积土体的强度参数均具有各向异性和非均质性，强度参数的改变对边坡安全系数具有影响。基于抗滑桩土拱效应的影响，考虑边坡土体强度参数的各向异性与非均质性，通过编程二次开发有限元软件，建立土体强度各向异性和非均质性的抗滑桩边坡模型，分析土体强度参数各向同性与各向异性条件下边坡安全系数的变化。研究结果表明，各向异性的非均质系数为0.5时，对抗滑桩边坡安全系数影响最大，比各向同性均质的边坡安全系数降低22.9%。与水平向黏聚力强度相比，垂直向对抗滑桩边坡稳定性影响更大，土体各向异性与非均质性对抗滑桩边坡稳定性分析十分重要。

Slope Stability Analysis of Anti-slip Piles in Plateau Area

Due to the complexity and variability of the actual environment, the strength parameters of the natural sedimentary soil of the slope are anisotropic and heterogeneous, and the change of the strength parameters has an impact on the safety factor of the slope. Based on the influence of anti-slide pile soil arching effect, considering the anisotropy and heterogeneity of soil strength parameters of slope, the anti-slide pile slope model with soil strength anisotropy and heterogeneity is established by programming the secondary development of finite element software, and the change of slope safety factors under the isotropic and anisotropic soil strength parameters are analyzed. The results show that when the heterogeneity coefficient of each anisotropy is 0.5, it has the greatest impact on the safety factor of the anti-slide pile slope, which is 22.9 % lower than that of the isotropic homogeneous slope. Compared with the horizontal cohesion strength, the vertical influence on the stability of anti-slide pile slope is greater, and the anisotropy and heterogeneity of soil are very important for the stability analysis of anti-slide pile slope.