Frothing is a main disease of highways in Yellow River Flood Field, due to the loss of dynamic strength of roadbed soils under the couple effects of temperature, salt, and vehicle traffic load. This is strongly linked to the dynamic characteristics of silt in this region. To analyze these couple effects on the dynamic characteristics of silt, a series of tests (i.e., freeze-thaw cycling tests, vibration triaxial tests and ultrasonic wave velocity tests) were conducted and two kinds of silt (i.e., salt-free and 3%-salt silt) were designed. The results indicate that the dynamic shear strength and dynamic modulus decrease with increasing freeze-thaw cycles, while the damping ratio simultaneously increases. Furthermore, compared to salt-free silt, the decrement of dynamic shear strength and dynamic modulus of silt with 3% salt is more significant, but the damping ratio of 3%-salt silt is larger. In ultrasonic wave velocity tests, ultrasonic wave velocity of frozen soil specimens decreases as the number of freeze-thaw cycles increases. Based on the results of ultrasonic wave velocity tests, a preliminary model is proposed to evaluate damage of silt through field measurement ultrasonic data. The study could provide a theoretical basis for the treatment of silty soil highway.

在温度，盐分和车辆通行负荷的共同作用下，由于路基土壤动力强度的损失，起泡是黄河泛洪区高速公路的主要病害。这与该地区淤泥的动态特性密切相关。为了分析这些对淤泥动力特性的耦合影响，进行了一系列测试（即冻融循环测试，振动三轴测试和超声波速度测试）和两种淤泥（即无盐和3％）。 -盐淤泥）。结果表明，动态剪切强度和动态模量随着冻融循环的增加而降低，而阻尼比则同时增加。此外，与无盐粉砂相比，含3％盐的粉砂的动态抗剪强度和动态模量的降低更为显着，但是3％盐泥沙的阻尼比较大。在超声波速度测试中，冻土样品的超声波速度会随着冻融循环次数的增加而降低。基于超声波速度测试的结果，提出了一种通过现场测量超声数据评估淤泥破坏的初步模型。该研究可为粉质土公路的处理提供理论依据。