初始含水率对白马湖疏浚淤泥透气真空排水效果的影响

发布时间：2018-11-27 09:13

【摘要】：针对不同疏浚工艺造成的疏浚淤泥初始含水率不同以及新疏浚淤泥含水率在短时间内呈现较大变化的实际工程情况,为探究初始含水率对疏浚淤泥真空排水效果的影响,对白马湖疏浚淤泥进行了不同初始含水率的淤泥透气真空排水室内模型试验。结果表明:(a)淤泥的初始含水率越高,真空促排作用产生的表面水越多,相同时间内淤泥促排含水率下降量越大,淤泥的排水效果越好;淤泥的真空排水过程可分为3个阶段,即快速排水阶段、稳定排水阶段以及缓慢排水阶段。(b)淤泥的初始含水率越高,淤泥进入缓慢排水阶段的时间越短,淤泥的真空排水周期也越短;淤泥的初始含水率越高,淤泥的含水率降低量越大,含水率降低过程越缓慢。
[Abstract]:In view of the fact that the initial moisture content of dredged silt is different and the moisture content of new dredged silt varies greatly in a short period of time, the effect of initial moisture content on vacuum drainage effect of dredged silt is investigated. In this paper, the indoor model test of porous vacuum drainage of dredged mud with different initial moisture content was carried out in Baima Lake. The results show that the higher the initial moisture content of: (a) silt is, the more surface water is produced by vacuum drainage, and the larger the decrease of moisture content in the same time, the better the drainage effect of silt. The vacuum drainage process of silt can be divided into three stages: rapid drainage stage, stable drainage stage and slow drainage stage, the higher the initial moisture content of. (b) silt, the shorter the time for silt to enter the slow drainage stage. The shorter the vacuum drainage period of silt is; The higher the initial moisture content of the silt is, the greater the decrease of the moisture content of the silt is, and the slower the process of the decrease of the moisture content is.
【作者单位】：河海大学岩土力学与堤坝工程教育部重点实验室;河海大学岩土工程科学研究所;
【基金】：国家自然科学基金(51109070) 温州市科技计划项目(S20100058) 浙江省自然科学基金(Y1110087)
【分类号】：U616

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