某输油管线滑坡形成机制及影响因素的数值模拟研究

Numerical simulation study on the formation mechanism and influencing factors of landslides in oil pipelines of a certain oil depot

某油库由于台风影响,短时强降雨,导致半坡输油管部分位置发生滑坡崩塌现象。根据现场滑坡特征与周边地形地质条件,建立滑坡前形成的斜坡地质模型,利用数值模拟软件,对斜坡地质模型进行稳定性分析,并对不同条件下的斜坡模型进行数值模拟与分析。对比分析得出,集油槽开裂雨水入渗是该滑坡形成的主要原因;雨水下渗深度越深,坡体的稳定性越差;随着坡角的增加,边坡稳定性越差,两者安全系数下降趋势基本相同。根据结论,提出一系列意见与建议。研究成果可为类似工程的分析评价提供借鉴。

A landslide collapse phenomenon occurred in some locations of the half-slope pipeline at an oil depot in Ningde due to the influence of a typhoon and short-term heavy rainfall.According to the characteristics of the landslide and the surrounding terrain and geological conditions,a geological model of the slope formed before the landslide was established,and software was used to analyze the stability of the geological model of the slope,analyze the formation mechanism of the landslide body,and carry out numerical simulation and analysis of the slope model under different conditions.The comparative analysis concludes that rainwater infiltration from the cracked oil collecting tank is the main reason for the formation of this landslide;the deeper the depth of rainwater infiltration,the worse the stability of the slope body,and at the same time,the greater the harm caused.With the increase of the foot of the slope,the stability of the slope under the natural state and rainwater infiltration conditions is worse,and the two safety coefficients decline trend is basically the same.Based on the conclusions,a series of observations and recommendations are made.The research results can provide a reference for the analysis and evaluation of similar pipeline slope projects.