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水泥潜入方式对淤积砂土的减渗效果影响

Study on Infiltration-reducing Effect of Different Cement-adding Methods to the Riverbed Alluvial Silt
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摘要 运用将水泥稀浆潜入河床淤积砂土的方式,构造室内河床淤积砂土的3种不同模拟入渗试验,揭示了不同水泥潜入方式对河床淤积砂土的阻渗作用和减渗效果。研究结果表明,水泥稀浆的3种不同潜入方式,对河床淤积砂土均有一定的阻渗作用和减渗效果;在新开偏砂性土渠或河道中,3种潜入方式减渗效果为:延时12h供水>同时供水>即时供水;延时12h供水潜入方式的减渗效果较稳定,减渗率可达30%左右;在已有蓄水土渠中,比较适合采用同时供水鼓气潜入水泥的方式,减渗效果可达10%以上;加大水泥添加量可以在一定程度上增加水泥在砂土基质中的潜入量,但添加量对减渗效果的增强贡献有限。研究结果可以为削减地表污染物通过地面水入渗进入地下水环境提供支撑。 Based on the indoor simulating infiltration tests of the alluvial riverbed silt,the infiltration-reducing effect of cement infiltrating into the riverbed silt with different adding cement slurry methods was revealed.The results show that the soil water infiltration capacities with three methods of adding cement slurry can be reduced considerably if adding cement slurry to the soil before or during the process of infiltration;In the partially sandy soil riverway without water,the infiltration-reducing effect with three methods of adding cement slurry reduces in the order of time delay water supply,synchronous water supply and instant water supply;The infiltration-reducing effects with the method of delaying the water supply time for 12hours can reach30%or more;In the partially sandy soil impoundment riverway,the method of synchronous water supply is more suitable,and its infiltration-reducing effect can reach more than 10%;The infiltration-reducing effect increases along with the adding cement amount on unit silt area,but it is not better with more cement-adding amount.The results can provide basic support for the researches of cutting pollutants into the groundwater through water infiltration.
出处 《太原理工大学学报》 CAS 北大核心 2014年第4期479-484,共6页 Journal of Taiyuan University of Technology
基金 山西省河道管护服务总站项目(科2012-1) 特细颗粒物质潜入河床底泥减少地下水污染效果研究 晋城市科技计划项目(201202238) 山西省社会科学联合协会项目(SSKLZDKT2012135)
关键词 潜入 淤积砂土 减渗效果 延时供水入渗 同时供水入渗 即时供水入渗 infiltrate alluvial silt infiltration-reducing effect time delay water supply synchronous water supply instant water supply
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