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由于水对黄土湿陷性的影响,公路路基在黄土地区的处治技术一直是研究的重点。为了研究强夯前、后路基的湿陷性处治效果以及在浸水前、后路基的沉降变形规律,在现场布置相应的处理方案与检测方法,对应于三种不同能级的强夯手段,通过土工试验结果,研究强夯前、后压实度与湿陷系数随土体深度的变化规律;通过现场载荷试验,研究原状未浸水、原状浸水、强夯未浸水、强夯浸水四种不同类型场地的地基极限承载力;通过浸水试验,研究强夯后浸水与未浸水场地的载荷与沉降变形曲线,沉降变形与时间曲线,分析不同的荷载下相应能级强度与变形的关系。
Due to the influence of water on the collapsibility of loess, the treatment technology of highway subgrade in the loess area has been the research focus. In order to study collapsibility treatment effect of subgrade before and after dynamic compaction and settlement law of subgrade before and after submerging, corresponding treatment schemes and test methods are arranged on site, corresponding to three kinds of dynamic compaction method with different energy levels, The result of geotechnical test shows that the compaction degree and collapsibility coefficient of soil before and after dynamic compaction change with depth of soil. Through the field load test, the effects of undisturbed water, intact water, dynamic compaction, The ultimate bearing capacity of foundation was studied. The load and settlement deformation curves, settlement deformation and time curves of soaking and non-immersion sites after dynamic compaction were studied by immersion test. The relationship between the corresponding energy levels and deformation under different loads was analyzed.