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首页> 外文期刊>Australian Geomechanics >EFFECTS OF INITIAL STRESS STATE ON PERFORMANCE OF EMBANKMENTS ON SOFT SOILS
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EFFECTS OF INITIAL STRESS STATE ON PERFORMANCE OF EMBANKMENTS ON SOFT SOILS

机译：初始应力状态对软土路堤性能的影响

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摘要

Analysing the behaviour of soft soil under embankment loads is a challenging task for geotechnical engineers. This numerical study revisits the case study of an embankment constructed on Boston Blue Clay, considering the model incorporating the influence of soil creep on the ground lateral deformation and pore water pressure. Then a numerical parametric study is conducted to investigate the influence of the lateral earth pressure coefficient at rest (K_0) calculated based on the different available correlations on the vertical and horizontal displacements, pore water pressures, and the factor of safety of the embankment. The results indicate that although the value of K_0 influences the predicted horizontal and vertical displacements notably, it has minor effects on the predicted pore water pressures. The lateral earth pressure coefficient influences the long term stability of the embankment and thus the effects of the initial stress field on the stability of embankments should be taken into consideration, while assessing the performance of embankments constructed on soft soils. It is recommended to determine the in situ horizontal stresses using accurate methods such as self-boring pressuremeter to predict the behaviour of embankments on the soft ground precisely.
机译：对路堤荷载下的软土特性进行分析对于岩土工程师而言是一项艰巨的任务。该数值研究重新考虑了在波士顿蓝粘土上建造的路堤的案例研究，考虑了包含土壤蠕变对地面侧向变形和孔隙水压力的影响的模型。然后进行了数值参数研究，研究了基于不同的可用相关性计算得出的静态侧向土压力系数（K_0）对竖向和水平位移，孔隙水压力以及路堤安全系数的影响。结果表明，尽管K_0的值显着影响预测的水平和垂直位移，但对预测的孔隙水压力影响较小。横向土压力系数会影响路堤的长期稳定性，因此在评估在软土上建造的路堤的性能时，应考虑初始应力场对路堤稳定性的影响。建议使用诸如自动钻孔压力计之类的精确方法确定现场水平应力，以精确预测软土地基上路堤的行为。

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