摘要
为有效解决传统疏浚淤泥堆场脱水效率低、占地周期长等问题,提出一种新型环式管袋堆场蓄淤脱水技术。通过持续长时间的室内物理试验,研究环式管袋堆场蓄淤脱水特性以及导水土工膜、堆场尺寸对淤泥脱水过程的影响规律,明晰环式管袋堆场淤泥脱水过程各阶段的数学表达及物理机制。研究结果表明:当双层环式管袋堆场不内设导水土工膜时,淤泥脱水过程可分为泥水分离、渗流、蒸发3个阶段,分别呈线性、指数、线性变化;当双层环式管袋堆场内设导水土工膜时,淤泥脱水过程变为4个阶段,其中泥水分离阶段和渗流阶段淤泥脱水速率显著加速,整体脱水效率显著提升,这是由于导水土工膜能够有效避免淤泥固体颗粒堵塞环式管袋经纬丝之间的缝隙。8层环式管袋堆场的淤泥脱水过程分为5个阶段,比双层堆场增加了沉降突变线性变化阶段,其他阶段的数学描述形式与双层堆场相似。随着堆场高度与内径之比的增大,淤泥沉降分布逐渐变为“倒圆锥形”形态,且堆场中心处沉降最大,淤泥整体脱水效率提升。研究成果对于疏浚淤泥有限堆放场地的高效利用具有一定意义。
To address the low dewatering efficiency and prolonged occupation period of traditional dredged sludge yards,a novel ring-type tube stockyard sludge storage and dewatering technology was proposed.Long-term laboratory experiments were conducted to investigate the dewatering dynamics,focusing on the synergistic effects of geotextile filters and dimensional parameters.The mathematical expressions for each stage of the sludge dewatering process in the ring-type tube stockyard were clarified.The results indicate that in a double-layer ring-type tube stockyard without a geotextile membrane,the sludge dewatering process consists of three stages:solid-liquid separation,seepage,and evaporation,which change linearly,exponentially,and linearly,respectively.In a double-layer ring-type tube stockyard with a geotextile membrane,the sludge dewatering process is divided into four stages.The dewatering rates in the solid-liquid separation and seepage stages are significantly accelerated,leading to improved overall dewatering efficiency.Mechanistically,this acceleration results from the geotextile membrane’s effectiveness in preventing solid sludge particles from clogging the inter-thread gaps in the ring-type tubes.In an eight-layer ring-type tube stockyard,the sludge dewatering process is divided into five stages,introducing a linear change stage of sudden settlement compared to the double-layer stockyard.The mathematical descriptions of the other stages are similar to those of the double-layer stockyard.As the ratio of yard height to inner diameter increases,the sludge settlement distribution takes on an“inverted cone”shape,with maximum settlement occurring at the center,thereby enhancing overall dewatering efficiency.These findings are crucial for the efficient utilization of limited storage space for dredged sludge.
作者
来志强
白盛元
陈林
邹维列
徐书岭
赵连军
LAI Zhi-qiang;BAI Sheng-yuan;CHEN Lin;ZOU Wei-lie;XU Shu-ling;ZHAO Lian-jun(Yellow River Institute of Hydraulic Research,Yellow River Conservancy Commission,Zhengzhou,Henan 450003,China;Yellow River Laboratory,Zhengzhou,Henan 450003,China;Key Laboratory of the Ministry of Water Resources for the Regulation of the Yellow River Downstream and Estuary,Zhengzhou,Henan 450003,China;Water Supply Bureau of Yellow River Henan Bureau,Yellow River Conservancy Commission,Zhengzhou,Henan 450004,China;School of Civil Engineering,Wuhan University,Wuhan,Hubei 430072,China)
出处
《岩土力学》
北大核心
2025年第9期2805-2815,共11页
Rock and Soil Mechanics
基金
国家重点研发计划项目(No.2023YFC3206203)
河南省优秀青年科学基金项目(No.232300421065)
湖北省重点研发计划项目(No.2023BCB112)
国家自然科学基金(No.U2443215,No.52379066)
北京江河水利发展基金会水利人才发展资助项目(No.JHYC202306)。
关键词
环式管袋堆场
室内模型试验
淤泥沉降
脱水特性
淤泥减量
ring-type tube stockyard
indoor model test
sludge sedimentation
dewatering characteristics
reduction of sludge
作者简介
第一作者:来志强,男,1990年生,博士,高级工程师,主要从事水工水力学方面的研究。E-mail:z.q.lai@outlook.com;通讯作者:陈林,男,1997年生,硕士,工程师,主要从事水力学及工程泥沙方面的研究。E-mail:linchen97@126.com。
