Static liquefaction failure of sloping grounds

当单调触发荷载作用的剪应力超过饱和可液化无粘性土的不排水屈服(峰值)抗剪强度时，斜坡地基发生静力液化破坏。现有的静剪应力作用下地基原位不排水强度和静力液化势的确定方法没有考虑各向异性固结和初始剪应力对无粘性土应变软化程度和脆性程度的影响。本研究将探讨初始剪应力值的变化对无粘性土的静力液化破坏的影响。对不同初始剪应力大小的砂土试件进行了一系列单调单剪试验。在Giffin Koerth工程的边坡稳定和滑坡分析中，将评估初始剪应力对砂样不排水应力-应变特性的影响。这些认识的提高将提高边坡稳定性分析的准确性和岩土结构的安全性。

Static liquefaction failure of a sloping ground occurs when the shear stress applied by a monotonic triggering load exceeds the undrained yield (peak) shear strength of the saturated liquefiable cohesionless soil. Current practices for determining the in-situ undrained strength and static liquefaction potential for ground subject to static shear stress do not account for the effects of anisotropic consolidation, and initial shear stress on the degree of strain-softening and brittleness of cohesionless soils. This study will investigate the effect of variations in the initial shear stress magnitude on static liquefaction failure of cohesionless soils. A series of monotonic simple shear tests will be carried out on sand specimens subject to different magnitudes of initial shear stresses. The effect of initial shear stress on undrained stress-strain behavior of sand samples will be assessed for slope stability and landslide analysis in Giffin Koerth projects. The improved understanding will enhance the accuracy of slope stability analysis and safety of geotechnical structures.