Large-scale model tests on dewater of dredged clay by use of ventilating vacuum method
Large-scale model tests on dewater of dredged clay by use of ventilating vacuum method
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发表时间：
2009
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通讯作者：
Hong Peng-yun
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作者：
Hong Peng-yun
设计并制作了一套大型疏浚淤泥通风真空脱水模型装置。对初始含水量高于3倍液限的疏浚粘土进行脱水试验。试验结果表明，采用通风真空法排水10 d，疏浚土体积可减少30%以上，排水1个月后，疏浚土的体积应变率仍在3%/d左右。研究了疏浚泥的平均含水量、变形速率以及疏浚泥分离水的悬浮物浓度的变化规律。研究发现，变形速率与平均含水量有很好的线性关系，悬浮固体浓度很低。
A large-scale model equipment was designed and made for dredged clays dewatering with ventilating vacuum method. Dewatering tests were performed on the dredged clays with initial water content being above 3 times liquid limit. The testing results showed that the volume of dredged clays can be decreased by over 30 percent with ventilating vacuum method for dewatering of 10 days, and the volume strain rate of dredged clays at the model still reaches about 3%/day when dewatering continues for one month. This paper also investigated the change law on the average water content and the deformation rate of dredged clays, as well as the suspended solids concentration of separated water from dredged clays. It was found that deformation rate has a good linear relationship with average water content, and the suspended solid concentration is very low.