干密度及初始含水率对含细粒土砾红层重塑土渗透性的影响

发布时间：2018-05-14 02:41

本文选题：红层 + 含细粒土砾　；参考：《水电能源科学》2014年01期

【摘要】：了解含细粒土砾红层边坡在不同雨强条件下干密度及初始含水率对渗透性的影响将有助于边坡稳定性分析。为此,特剔除含细粒土砾中粒径大于2 mm以上的颗粒,制备了不同干密度及初始含水率的5组重塑土试样并做了变水头渗透试验。试验结果表明,渗透速度—水力坡降曲线、渗透系数—水力坡降曲线具有明显的三段线特征,干密度对第一、二转折点水力坡降的影响大于初始含水率;同一干密度条件下,初始含水率对渗透速度—水力坡降曲线中第二段曲线斜率k影响最大;同一初始含水率条件下,干密度对第一段曲线斜率a、第三段曲线斜率b影响最大。
[Abstract]:The influence of dry density and initial moisture content on the permeability of red bed slope with fine grained soil under different rainfall intensity will be helpful to the analysis of slope stability. For this reason, five groups of remolded soil samples with different dry density and initial moisture content were prepared and the permeability test was done by removing the particles with diameter more than 2 mm in fine grained soil gravel. The experimental results show that the permeability velocity-hydraulic gradient curve, permeability coefficient and hydraulic gradient curve have obvious three-section line characteristics, and the influence of dry density on the first, second turning point hydraulic gradient is greater than the initial water content, and under the same dry density condition, the effect of dry density on hydraulic gradient is greater than that of initial water content. The effect of initial water content on the slope k of the second stage of the permeation velocity-hydraulic gradient curve is the largest, while the dry density has the greatest influence on the slope a of the first section and the slope b of the third section under the same initial water content.
【作者单位】：中国地质大学工程学院;黄淮学院建筑工程学院;
【分类号】：U412.22

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