Model tests on methods to improve dewatering efficiency for sludge-inflated geotextile tubes
Model tests on methods to improve dewatering efficiency for sludge-inflated geotextile tubes
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DOI：
10.1680/jgein.15.00019
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发表时间：
2015-09
影响因子：
4.5
通讯作者：
W. Guo;J. Chu;B. Zhou
中科院分区：
文献类型：
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作者：
W. Guo;J. Chu;B. Zhou
摘要：由编织土工织物材料制成的土工织物管已广泛应用于消化生物固体、污水污泥、疏浚物、工业固体废物、粉煤灰和煤浆等废弃污泥的处理。然而，单个土工织物管的脱水过程是耗时的。通过室内模型试验，研究了两种加速土工合成管中泥浆脱水过程的方法。第一种方法是将一个管堆叠在另一个管的顶部，并使用顶部管的重量来预加载底部管。第二种方法是本文提出的真空法，利用真空压力对土工合成管中的浆液进行固结。选择2.0 mm厚的编织聚丙烯土工合成片材作为土工织物管。本文给出了模型试验中监测到的变形、孔隙水压力和拉力随时间的变化情况，并进行了分析。并对固结后的土的性质进行了测定和比较。模型测试数据…
ABSTRACT: Geotextile tubes made of woven geotextile materials have been widely applied to dewater waste sludge such as digested bio-solids, sewage sludge, dredged materials, industrial solid wastes, fly ash and coal slurry. However, the dewatering process of single geotextile tubes is time consuming. Two methods to accelerate the dewatering process of slurry in geosynthetic tubes were studied using laboratory model tests. The first method was to stack one tube on top of another and use the weight of the top tube to preload the bottom one. The second method was the vacuum method proposed in this paper to use vacuum pressure to consolidate the slurry in the geosynthetic tube. A 2.0-mm-thick woven polypropylene geosynthetic sheet was selected for the geotextile tubes. The deformation, pore water pressure and tensile forces monitored during the model tests against time are presented and analysed in this paper. The properties of the soil after consolidation were also measured and compared. The model test data ...