曹妃甸深槽斜坡稳定性影响因素敏感性分析

Sensitivity Analysis of the Factors Affecting Slope Stability in the Caofeidian Deep Groove

海洋灾害地质因素中,虽然海底滑坡发生频率不高、但造成的灾害损失往往会较严重,斜坡的稳定性受众多因素综合影响,且各因素对斜坡稳定性的影响程度存在差异,其敏感性分析一直是国内外研究的重要内容。本文以曹妃甸深槽海底斜坡为研究对象,分析了水下斜坡稳定性的影响因素。应用滑坡稳定性分析软件Geo-Slope对黏聚力、内摩擦角、重度、坡度等内在敏感因素以及地震动参数、附加荷载和波高这3个外在敏感因素进行了单因素敏感性分析,认为内在因素中内摩擦角最为敏感,外在因素中地震动参数的敏感度最高。通过对水下斜坡稳定性影响因素及其敏感性分析,可为海底滑坡的防治规划提供依据。

Of marine geological disaster factors,the submarine landslides do not occur frequently,but the disaster losses caused by them are often more serious.The slope stability can be comprehensively influenced by many factors and the influence degree of these factors is different.Therefore,the sensitivity analysis of factors influencing the slope stability has always been one of the important aspects at home and abroad.By taking the slope of the Caofeidian deep groove as the research object,the factors influencing the stability of underwater slope are analyzed.By using the software Geo-Slope,a single-factor sensitivity analysis is made of intrinsic sensitivity factors such as cohesive strength,internal friction angle,density and falling gradient and three external sensitive factors including seismic coefficient,additional load and wave height.The results show that the internal friction angle of the intrinsic sensitivity factors is the most sensitive and the seismic coefficient of the external sensitive factors is the highest in sensitivity.This sensitivity analysis will provide the basis for the control program of submarine landslides.