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湿陷性黄土受地下水位上升的影响,在上部荷载压力下,土体结构迅速破坏,湿陷性消失,土的工程力学性质明显减弱,并产生显著的附加下沉。通过长时间地跟踪观测地下水位及采取原状黄土试样进行试验分析,以西安市南郊某工程为实例,分析研究了地下水位上升对地基土相关物理力学指标的影响。通过实例分析,对黄土的性质有了进一步认识,为以后相似场地建筑地基处理方案的确定提供了科学依据。
Collapsible loess is affected by the rise of groundwater level. Under the upper loading pressure, the soil structure rapidly destroys and the collapsible nature disappears. The mechanical properties of soil are significantly weakened and significant additional sinking occurs. Through long-time follow-up observation of groundwater table and sample analysis of intact loess, this paper takes a project in the southern suburbs of Xi’an as an example to analyze and study the influence of groundwater level rise on the related physical and mechanical indexes of foundation soil. Through the example analysis, the nature of loess has been further recognized, which will provide a scientific basis for the determination of foundation treatment plans for similar site construction.