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悬浮泥沙到沉积土的形成过程非常复杂,涉及到泥沙的沉降和土的自重固结。物理模型试验需要实测含水率、密度、颗粒分布、超孔隙水应力和总应力,但目前尚无简单可行的方法。提出了一种改进的室内试验方法,通过与国内外现有试验方法相对比,改进后的方法不仅可以得到泥沙在沉积过程中的泥面下沉变化、含水率(密度)分布、超孔压消散剖面,而且还能得到沉积物在不同高度和时间的颗粒分布变化等性质。通过多个试验实测及一致性测试表明,实测数据合理、可信,一致性检验误差较小,验证了此方法的可行性。
The formation process of suspended sediment to sedimentary soil is very complicated, involving sedimentation of sediment and self-weight consolidation of soil. Physical model tests require measured moisture content, density, particle distribution, excess pore water stress and total stress, but there is no easy way to do this. An improved indoor test method is proposed. Compared with the existing test methods both at home and abroad, the improved method can not only get the change of mud surface sediment, moisture content (density) distribution, Pressure dissipation profile, but also to get the sediment at different heights and time of the particle distribution and other properties. The results of several experiments and conformance tests show that the measured data are reasonable, credible and the error of consistency test is small, which verifies the feasibility of this method.