黄土颗粒分离方法试验研究
发布时间：2018-10-25 12:37
【摘要】：以延安新区I期工程的马兰黄土为研究对象,分别采用筛分法、离心机法和静水沉降法对其进行颗粒分离试验,并利用激光粒度仪对3种分离方法的试验结果进行跟踪对比,以研究最适用于黄土颗粒的分离方法。结果表明:筛分法主要适用于粒径大于0.05mm的黄土颗粒的分离,对粒径小于0.05mm的黄土颗粒分离效果较差,筛分结果的可靠性偏低。离心机法由于自身的局限性且受影响因素较多,试验结果的可靠性较低;静水沉降法主要适用于粒径小于0.05mm的黄土颗粒的分离,颗粒分级效果显著,试验结果的可靠性较高,且试验精度满足要求,但对于粒径小于0.002mm的颗粒分离时间较长。通过3种试验方法的对比可知,在对黄土进行颗粒分离试验时,宜采用筛分—沉降相结合的分离方法,对于大于0.05mm的颗粒宜采用筛分,对于小于0.05mm的颗粒宜采用静水沉降法。
[Abstract]:Taking Ma Lan loess in phase I project of Yan'an New District as the research object, the particle separation tests were carried out by sieving method, centrifuge method and static water sedimentation method, and the results of three separation methods were tracked and compared by laser particle size meter. In order to study the most suitable for the separation of loess particles. The results show that the sieving method is mainly suitable for the separation of loess particles with diameter larger than 0.05mm, and the separation effect of loess particles with diameter smaller than 0.05mm is poor, and the reliability of the screening results is low. Because of its own limitation and many affected factors, the reliability of the test results is low, the static water sedimentation method is mainly suitable for the separation of loess particles with diameter less than 0.05mm, the effect of particle classification is remarkable, and the reliability of the test results is higher. The precision of the experiment meets the requirement, but the separation time for the particle with diameter less than 0.002mm is longer. Through the comparison of three test methods, it can be seen that in the test of loess particle separation, sieving combined with settling method, sieving method for particles larger than 0.05mm and static water settling method for particles smaller than 0.05mm are appropriate.
【作者单位】： 长安大学地质与测绘工程学院;国土资源部岩土工程开放研究实验室;西安长庆科技工程有限责任公司;四川省煤田地质工程勘察设计研究院;
【基金】：国家自然科学基金(41172255,41572264,41440044) 中央高校基本科研业务费项目(2014G2260008) 西安长庆科技工程有限责任公司项目(CTEC(2014)Z-KY-013)
【分类号】：S152
，
本文编号：2293713
[Abstract]:Taking Ma Lan loess in phase I project of Yan'an New District as the research object, the particle separation tests were carried out by sieving method, centrifuge method and static water sedimentation method, and the results of three separation methods were tracked and compared by laser particle size meter. In order to study the most suitable for the separation of loess particles. The results show that the sieving method is mainly suitable for the separation of loess particles with diameter larger than 0.05mm, and the separation effect of loess particles with diameter smaller than 0.05mm is poor, and the reliability of the screening results is low. Because of its own limitation and many affected factors, the reliability of the test results is low, the static water sedimentation method is mainly suitable for the separation of loess particles with diameter less than 0.05mm, the effect of particle classification is remarkable, and the reliability of the test results is higher. The precision of the experiment meets the requirement, but the separation time for the particle with diameter less than 0.002mm is longer. Through the comparison of three test methods, it can be seen that in the test of loess particle separation, sieving combined with settling method, sieving method for particles larger than 0.05mm and static water settling method for particles smaller than 0.05mm are appropriate.
【作者单位】： 长安大学地质与测绘工程学院;国土资源部岩土工程开放研究实验室;西安长庆科技工程有限责任公司;四川省煤田地质工程勘察设计研究院;
【基金】：国家自然科学基金(41172255,41572264,41440044) 中央高校基本科研业务费项目(2014G2260008) 西安长庆科技工程有限责任公司项目(CTEC(2014)Z-KY-013)
【分类号】：S152
，
本文编号：2293713
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