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膨胀岩渠道边坡稳定性问题是南水北调中线工程中的关键性技术问题。膨胀岩具有吸水膨胀、失水收缩的特殊性质,反复胀缩变形导致强度衰减,易对渠道边坡造成危害。文章以南水北调中线工程安阳段为例,在强降雨导致地下水位升高的影响下,渠道边坡发生失稳破坏,在考虑膨胀岩特殊性质的基础上,运用极限平衡理论和有限元理论进行分析计算,对失稳原因做出分析。
The stability of slope in expansive rock channel is a key technical issue in the midline of South-to-North Water Diversion Project. Expansive rock with water swelling, loss of shrinkage of the special nature of repeated deformation deformation led to strength decay, easy to cause harm to the channel slope. Taking the Anyang section of the mid-route of South-to-North Water Diversion Project as an example, under the influence of the rising of groundwater level caused by heavy rainfall, the slope failure of the channel occurs. Based on the special properties of the expansive rock, the limit equilibrium theory and finite element theory Calculation, to analyze the causes of instability.