【摘要】 本文叙述了用瞬态冲击法快速、无损测定路基压实度的原理以及技术关键.即在瞬态冲击下,存在S-G低频水滞频率,其压实度响应值与它的含水量几乎无关,并用均方谱作为指标,具有较高的响应值分辨力.更多还原

【Abstract】 This paper depicts the principle and technical keys of rapid and nondestructive measurement of subgrade compactness by the instantaneous impulsion method. When the soil is in a state of instantaneous impulsion, there exists a S-G low frequency portion in the soil, i. e. the water-retardation frequency portion, and within this portion the measured compactness response value has almost no connection with the moisture content in soil. The mean square spectrum has been used as the compactness response value index due to its better resolving power.更多还原