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为了查清苏丹膨胀土的工程地质性质 ,进行了系统的现场和室内研究测试工作 ,包括现场浸水膨胀试验、膨胀剪切力试验、标准贯入、静力触探、十字板剪切、微型贯入、纵横波速、卓越周期、刚度系数、电阻率测试 ,和在实验室进行的密度、表观密度、含水质量分数、干密度、最优含水质量分数、收缩率、自由膨胀率、不同压力下的膨胀率、膨胀压力、三轴实验、直剪实验、固结实验、渗透实验、酸碱性测试等 ,得出了天然和饱水状态下苏丹膨胀土的物理力学性质指标 ,定量分析了膨胀土性质随含水质量分数的变化及膨胀影响因素 ,建立了膨胀压力和膨胀量的预测公式。
In order to find out the engineering geological properties of Sudan expansive soils, systematic on-site and in-house research tests were carried out, including on-site immersion expansion test, expansive shear test, standard penetration test, static penetration test, Intrinsic and longitudinal wave velocity, excellent cycle, stiffness coefficient, resistivity test, and density, apparent density, water content, dry density, optimal water content, shrinkage, free expansion, The expansive pressure, the triaxial test, the direct shear test, the consolidation test, the infiltration test, the acidity and the alkaline test, the physical and mechanical properties indexes of Sudan expansive soil under natural and saturated conditions were obtained, and the expansions With the change of soil water content and the influence factors of swelling, the prediction formula of expansion pressure and expansion quantity was established.