摘要
基于高浊度水的动态沉积原理,堆场疏浚泥被划分为清水层、浑水层和底部淤积层,考虑吹填中疏浚泥泥量、水量的动平衡,建立堆场疏浚泥动态沉积计算模型,预测施工期泥面、浑液面及水位随时间的变化关系,确定所需的围埝高度、沉积区面积及存储容积。通过算例分析泥浆初始颗粒浓度、吹填流量与浑液面沉速对围埝高度、沉积区面积及存储容积的影响。结果表明:吹填流量、浑液面沉速对沉积区面积的影响较大,而泥浆初始颗粒浓度对沉积区面积的影响很小;围埝高度与吹填流量无关,而泥浆初始颗粒浓度、浑液面沉速对围埝高度的影响较大;吹填流量对沉积区存储容积的影响最大,浑液面沉速的影响次之,而泥浆初始颗粒浓度的影响最小。
Based on the theory of dynamic sedimentation,dredged slurries in the containment area are divided into supernatant layer,turbid layer and alluvium layer.A dynamic sedimentation model of dredged slurries is proposed,considering dynamic equilibriums of water mass and solid mass of the dredged slurry during hydraulic fill.The model can predict the variation on each layer surface versus time,moreover,it can determine the height of reclamation dam,the area of sedimentation zone and the initial storage capacity,the influence on which,caused by initial solid concentration of dredged slurry,filling rate and settling velocity of turbid layer surface,is analyzed by a case.The results show that settling velocity and filling rate have a great effect on the area of sedimentation zone,however,the influence of initial solid concentration is a little.The height of reclamation dam is not related to filling rate but affected greatly by settling velocity and initial solid concentration.Filling rate has a significant influence on the initial storage capacity,and the influence of settling velocity is the second,while the initial solid concentration has the least influence.
出处
《防灾减灾工程学报》
CSCD
北大核心
2017年第3期449-455,共7页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(51378118)
国家科技支撑计划项目(2015BAB07B06)
安徽科技学院2016人才引进项目(830158)资助
关键词
高含水率
疏浚泥
堆场
动态沉积
计算模型
high water content
dredged slurries
containment area
dynamic sedimentation
computational model
