| 悬浮颗粒的浓度对其在饱和多孔介质中迁移和沉积特性的影响 |
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| 引用本文： | 陈星欣,白冰,闫瑜龙,贾丁云.悬浮颗粒的浓度对其在饱和多孔介质中迁移和沉积特性的影响[J].岩土力学,2012,33(8):2343-2348. |
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| 作者姓名： | 陈星欣 白冰 闫瑜龙 贾丁云 |
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| 作者单位： | 北京交通大学 土木建筑工程学院，北京 100044 |
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| 基金项目： | 国家自然科学基金资助项目(No.50978022);中央高校基本科研业务费专项资金资助项目(No.2011YJS047) |
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| 摘 要： | 多孔介质中悬浮颗粒迁移和沉积特性的研究对地下污染物净化、石油开采、核废料处置、水土保持等有很重要的意义。对4种不同浓度的悬浮颗粒在3种不同的渗流速度下进行室内试验，研究悬浮颗粒的浓度对其迁移和沉积特性的影响。结果表明，在一定的悬浮颗粒浓度下，随着渗流速度的增加，穿透曲线中的悬浮颗粒的相对浓度也增大。同时，渗流速度一定时，悬浮颗粒的浓度存在一个临界值，小于该临界值，穿透曲线中的相对浓度随悬浮颗粒的浓度增大而增大；大于该临界值时，相对浓度随悬浮颗粒的浓度增大而减小。另外，悬浮颗粒的临界浓度是与渗流速度相关的，随着渗流速度增加，悬浮颗粒的临界浓度也逐渐增大
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| 关 键 词： | 悬浮颗粒 浓度 饱和多孔介质 迁移 沉积 |
| 收稿时间： | 2011-07-21 |
Influence of concentration of suspended particles on transport and deposition characteristics in saturated porous media |
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| CHEN Xing-xin
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BAI Bing
,
YAN Yu-long
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JIA Ding-yun.Influence of concentration of suspended particles on transport and deposition characteristics in saturated porous media[J].Rock and Soil Mechanics,2012,33(8):2343-2348. |
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| Authors: | CHEN Xing-xin BAI Bing YAN Yu-long JIA Ding-yun |
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| Institution: | School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | Suspended particles transport and deposition in porous media play an important role in pollutant purification,oil exploration,nuclear waste disposal,water-soil conservation.In order to study the effect of suspended particles concentration on the breakthrough curves,4 different suspended particle concentrations have been studied under 3 flow velocities in columns of saturated porous media.The studies show that,under constant suspended particle concentration,the relative concentration is increase with the flow velocity.Meanwhile,under a constant flow velocity,there exists a critical concentration for suspended particles.Below the critical concentration,relative concentration in breakthrough curves is in creased with the suspended particles concentration;but the trend is inversely when the suspended particle concentration is more than the critical value.Besides,the critical concentration of suspended particles is related to the flow velocity;the critical value is increased with the flow velocity. |
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| Keywords: | suspended particle concentration saturated porous media transport deposition |
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