EAPSI:Laboratory Scale Testing of the Thermal Improvement of Soft Clays

EAPSI:软粘土热改进的实验室规模测试

基本信息

  • 批准号:
    1614253
  • 负责人:
  • 金额:
    $ 0.54万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Fellowship Award
  • 财政年份:
    2016
  • 资助国家:
    美国
  • 起止时间:
    2016-06-01 至 2017-05-31
  • 项目状态:
    已结题

项目摘要

The main objective of this summer research is to study how soft clays are able to gain strength by the injection of high temperatures. This newly developed concept is called thermal consolidation. The researcher will work under the supervision of Dr. Chang-Young Yune at the Gangneung-Wonju National University in South Korea and Dr. Guney Olgun from Virginia Tech in the USA. Dr. Yune is a world-renown expert in soft clay engineering and has developed a consolidation chamber to study the compression of soft clays. This is a one-of-a-kind experimental setup that will allow the researcher to inject a range of high temperatures into a variety of clayey soils to assess how this increase in temperature affects the strength of the soil. The improvement of soft soils is of paramount importance because it will enable the construction of heavy structures on soft soils.The thermal consolidation will be conducted by circulating hot fluid in a piping system that goes down and up through a borehole contained in a consolidation chamber. Clay particles increase in volume due to thermo-elastic expansion, which causes a reduction in pore volume between the clay particles, and a subsequent increase in strength. This experimental study will allow the researcher to understand the behavioral mechanisms of pore pressure development, drainage, and strength gain during the thermal improvement. The thermal improvement of soft clays represents a major scientific and engineering breakthrough to improve in-situ conditions of soft clay deposits for the construction of buildings with heavy structural loads. The expected findings will also positively impact the engineering practice by reducing the costs associated with in-situ ground improvement of soft clay deposits. The summer research will lay the foundations for more detailed experimental and analytical studies to further investigate the thermo-mechanical phenomenon related to thermal improvement of soft clays. This award under the East Asia and Pacific Summer Institutes program supports summer research by a U.S. graduate student and is jointly funded by NSF and the National Research Foundation of Korea.
今年夏季研究的主要目标是研究软粘土如何通过注入高温而获得强度。这个新发展的概念被称为热固结。该研究员将在韩国江陵原州国立大学的yunchang - young博士和美国弗吉尼亚理工大学的Guney Olgun博士的指导下工作。尤恩博士是世界知名的软粘土工程专家,他开发了一种固结室来研究软粘土的压缩。这是一种独一无二的实验装置,它将允许研究人员将一系列高温注入各种粘性土壤,以评估温度的升高如何影响土壤的强度。软土的改良对于在软土上建造大型结构具有至关重要的意义。热固结将通过循环热流体在管道系统中进行,该管道系统向下和向上通过包含在固结室中的钻孔。粘土颗粒的体积增加是由于热弹性膨胀,这导致粘土颗粒之间的孔隙体积减小,随后强度增加。本实验研究将使研究人员了解热改善过程中孔隙压力发展、排水和强度增加的行为机制。软粘土的热改良是改善软粘土堆积物原位条件的重大科学和工程突破,适用于结构荷载较大的建筑。预期的研究结果还将通过降低与软粘土沉积物原位地基改善相关的成本,对工程实践产生积极影响。夏季的研究将为更详细的实验和分析研究奠定基础,以进一步研究与软粘土热改良有关的热力学现象。该奖项是由美国国家科学基金会(NSF)和韩国国立科学研究财团共同资助的东亚太平洋暑期研究所项目,旨在支持美国研究生的暑期研究。

项目成果

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