The disintegration test of sandstone soil was carried out with the improved disintegration test device. The effects of moisture content, relative density and particle size on the collapse characteristics of compacted soil were studied. The changing law of disintegration time,disintegration and underwater repose angle of sandstone sam-ples were analyzed. Experimental results showed that low water content accelerated the disintegration time; the specimens with relatively high density were more difficult to disintegrate. There was a close relationship between the disintegration and the water content,but not significantly with the relative density. The size of the underwater re-pose angle was closely related to the disintegration time. The faster the disintegration time of formation of the angle of repose was small.%利用改进后的崩解试验装置对砂岩土料制成的试样进行崩解试验.探究含水率、相对密实度及颗粒级配对压实土体崩解特性的影响.分析了砂岩试样崩解时间、崩解量和水下休止角的变化规律.试验结果表明,低含水率加快了试样崩解时间;相对密实度较大时,试样更难以崩解.崩解量与含水率关系密切,与相对密实度关系不显著.水下休止角的大小与崩解时间密切相关,崩解时间越快形成的水下休止角越小.
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