| 张 磊,周 傲,刘传新.航道膨胀土边坡力学参数反演及变形预测分析*[J].水运工程,2025,(1):177-184 |
| 航道膨胀土边坡力学参数反演及变形预测分析* |
| Mechanical parameter inversion and deformation prediction of expansive soil slope in waterway |
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| DOI： |
| 中文关键词: 膨胀土边坡 正交设计 敏感性分析 参数反演 变形预测 |
| 英文关键词:expansive soil slope orthogonal design sensitivity analysis parameter inversion deformation prediction |
| 基金项目:国家重点研发计划重点专项（2019YFC1509800） |
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| 中文摘要: |
| 膨胀土边坡在干湿交替的环境下，边坡土体会发生明显的涨缩和强度衰减的现象，从而容易引发边坡滑坡与滑移事故。因此，快速、准确地获取土体参数对处治修复膨胀土边坡具有重要意义。以某航道整治工程为背景，基于室内土工试验参数，以现场实际布设测斜管所测不同深度下的水平位移为评价指标，利用正交试验对膨胀土边坡的土体参数进行敏感性分析，通过最小二乘支持向量机构建膨胀土边坡土体参数反演模型，并对该反演模型进行验证，获得反演后的土体参数，再将反演后的土体参数对膨胀土边坡处治修复进行最不利工况的正演计算，对膨胀土边坡的变形进行预测分析。结果表明，基于最小二乘支持向量机构建的反演模型可以实现对现场施工进行动态设计以及对施工期内的边坡变形进行预测。 |
| 英文摘要: |
| When the expansive soil slope alternates between dry and wet,the slope soil will have obvious shrinkage-stretch and strength attenuation,which will easily lead to slope landslide and sliding accidents.Therefore,it is extremely important to obtain soil parameters quickly and accurately for treating and repairing expansive soil slopes.On the basis of the indoor soil test parameters of a waterway regulation engineering,the sensitivity analysis of soil parameters of the expansive soil slope is carried out by orthogonal test with the horizontal displacement measured at different depths by the actual layout of inclinometer tubes as the evaluation index.Then the soil parameter inversion model of the expansive soil slope is built by the least squares support vector machine（LS-SVM）,and the inversion model is verified.The soil parameters after inversion are obtained,and then the forward calculation of the most unfavorable conditions with obtained soil parameters after inversion for the treatment and restoration of the expansive soil slope is carried out to predict and analyze the deformation of the expansive soil slope.The results show that the inversion model based on the LS-SVM can realize the dynamic design of site construction and the prediction of slope deformation during the construction period. |
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