Numerical study of the effect of soil–atmosphere interaction on the stability and serviceability of cut slopes in London clay
Numerical study of the effect of soil–atmosphere interaction on the stability and serviceability of cut slopes in London clay
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DOI：
10.1139/cgj-2016-0319
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发表时间：
2017-03
影响因子：
3.6
通讯作者：
A. Tsiampousi;L. Zdravković;D. Potts
中科院分区：
文献类型：
--
作者：
A. Tsiampousi;L. Zdravković;D. Potts
在降雨和植被共同作用下，开挖边坡的稳定性受孔压季节性变化的影响较大。然而，预测土壤-大气相互作用并不是一帆风顺的，因为所涉及的边界条件和土壤的流体力学行为都是高度耦合和高度非线性的，这使得使用诸如有限元分析等数值工具是必要的。本文讨论了土壤-大气相互作用的数值模拟，并给出了在高度植被覆盖的地区伦敦粘土中的一个边坡的分析。考虑了边坡的整个生命周期，包括低需水阶段、高需水阶段、植被恢复阶段和植被清除阶段。分析结果表明，茂密的植被与较高的安全系数相关，但可能会产生较大的差异位移，这可能会影响边坡的使用性能。然而，植被清除可能会引发不稳定，突显出需要...
The stability of cut slopes is greatly influenced by seasonal pore-water pressure variations under the combined effect of rainfall and vegetation. However, predicting soil–atmosphere interaction is not straightforward, due to the complexity of both the boundary conditions involved and the hydromechanical behaviour of soils, which is coupled and highly nonlinear, rendering the use of numerical tools, such as finite element analysis, necessary. This paper discusses the numerical modelling of soil–atmosphere interaction and presents the analysis of a slope cut in London clay in a highly vegetated area. The whole life cycle of the slope is considered with phases of low and high water demand vegetation and vegetation clearance. The analysis results indicate that dense vegetation is associated with high factors of safety, but may induce large differential displacements, which are likely to affect the serviceability of the slope. Vegetation clearance, however, may initiate instability, highlighting the need for ...