黄土路基沉降机理及预测模型研究

Study on Settlement Mechanism and Prediction Model of Loess Subgrade

基于某一级公路实体工程,采用室内土单元试样压缩试验结合现场沉降监测的研究方法,探究了土单元变形特征对黄土路基沉降的影响规律和机理。以室内试验结果和现场沉降监测结果为依据,建立了黄土路基沉降预测模型,并通过实体工程进行验证,结果表明:所建立的模型优化了分层总和法的计算准确度,可适用于差异化约束条件下黄土路基沉降计算。

Based on a first-class highway project, the influence law and mechanism of soil unit deformation characteristics on the settlement of loess subgrade are explored by using the research method of indoor soil unit sample compression test combined with on-site settlement monitoring. Based on the laboratory test results and the on-site settlement monitoring results, a prediction model for the settlement of loess subgrade is established, and verified by a real project. The results show that the established model optimizes the calculation accuracy of the layered summation method, and can be applied to the settlement calculation of loess subgrade under different constraints.