以云南滇池疏浚淤泥为研究对象, 基于多孔介质理论和达西定律, 使用自制变压头渗透装置, 探讨了在疏浚淤 泥脱水过程中, 0~ 100 kPa 范围内不同负载压力对渗流规律的影响。通过测定不同负载压力下淤泥的渗透速率、 渗透系数、过滤常数、滤液量、渗流量以及负载结束后泥饼含水率与孔隙率, 分析淤泥渗流效果, 结果表明: 不同负载 压力下, 水分在淤泥颗粒中的渗流规律满足达西定律, 即渗透速率与压力梯度呈线性关系, 负载压力越大渗流效果 越明显; 当负载压力为100 kPa 时, 淤泥渗透性能最佳, 所得泥饼含水率最低。

Based on the theor y of por ous media and Darcy's law , t he var iable pressur e head permeameter was used as the test ap2 paratus to inv est igat e t he impact s of different pr essure loading s in the range of 0 to 100 kPa o n the seepage law of dredg ed sludg e of Dianchi Lake in Yunnan Pro vince dur ing the dew atering pr ocess. The seepag e v elocity, permeabilit y coefficient, f iltr a2 tion co nstant, filt ratio n and seepage v olume, and moisture content and por osity of filter cake after t he end of loading under dif2 fer ent pressure lo ading s wer e measured to character ize the seepag e effects o f sludg e. The results indicated that the seepag e law of w ater in the sludg e under different pressur e loading s meets the Darcy. s law, which means that seepag e velo city has a linear co rr elation wit h pressure g radient . The g reater the pressur e lo ading is, the better the seepag e effect is. Seepage per formance of dr edg ed sludge is the best and moisture content of filter cake is the lowest w hen the pr essure loading is 100 kPa.