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针对黄土填方场地的沉降变形问题,通过进行不同初始含水率和干密度的重塑黄土的高压固结试验,发现荷载与干密度的比值(p/pd)与荷载(p)呈很好的线性关系,并以此为依据建立了不同厚度(荷载)填方场地的沉降预测模型。该模型有k和b两个参数,其中k随着初始含水率(w_0)或初始干密度(p_(d0))的增大而减小,三者之间的关系为:p_(d0)k+w0=1;b主要与初始干密度有关,随着初始干密度增大而减小。与前人基于孔隙比和荷载关系所建立的压缩变形计算模型的对比分析发现,用干密度和荷载表示土压缩性的方法与试验数据拟合精度更高,且线性相关性更强,更适合于重塑黄土的压缩变形预测。
According to the high pressure consolidation test of remolded loess with different initial moisture content and dry density, it is found that the ratio of load to dry density (p / pd) and load (p) are very good Based on this, the settlement prediction models of different thickness (load) fillings are established. The model has two parameters, k and b, where k decreases with the initial water content (w_0) or the initial dry density (p_ (d0)). The relationship among the three is: p_ (d0) k + w0 = 1; b is mainly related to the initial dry density and decreases as the initial dry density increases. Comparing with the predecessors’ calculation model of compressive deformation based on void ratio and load, it is found that the method of fitting dry density and load with soil compressibility is more accurate than the experimental data and the linear correlation is more suitable Prediction of compressive deformation of remolded loess.