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Experimental study of displacement field of layered soils surrounding laterally loaded pile based on transparent soil

机译：基于透明土壤横向装载桩周围土壤排水场的试验研究

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摘要

Purpose In the pile-soil interaction system, the disturbed soil directly affects the safety of the laterally loaded pile. The soil displacement field helps to evaluate the range and degree of soil disturbance. This study presents a method of visualiziing the displacement field of the soil around the laterally loaded pile by using transparent soil technology, which overcomes the measurement obstacles caused by the non-transparency of the real soil.Methods Glass sand and transparent pore solution were mixed to make a saturated transparent soil with two particle sizes (0.1 similar to 0.5 mm and 0.5 similar to 1 mm). Instead of real soil, transparent soil was used to observe the degree of disturbance in the process of interaction with laterally loaded piles. In addition, particle image velocimetry (PIV) was used to capture the displacement of transparent soil particles. The displacement of each particle was integrated into the displacement field by a MATLAB program.Results When a horizontal force was applied on the top of the pile, the particles in front of the pile were compressed, producing observable movement within a certain area. From the displacement vector diagram, it could be seen that the displacement area of the soil surface in front of the pile increases as the layer thickness of large particle soil increases. The vertical displacement of soil in front of the pile was compacted to form a wedge-shaped area under the horizontal load. The angle between the direction of soil motion and the horizontal plane was positively correlated with the thickness of the soil layer.Conclusion Transparent soil and particle image velocimetry can help reveal the displacement trends of the soil around a laterally loaded pile. Based on this, an early warning can be provided when the displacement value and displacement angle of the soil around the laterally loaded pile exceeds the normal range.
机译：目的在桩土相互作用系统中，受扰动的土壤直接影响横向装载桩的安全性。土壤位移领域有助于评估土壤障碍的范围和程度。本研究提出了一种通过使用透明的土壤技术在横向装载的桩周围围绕横向装载的堆叠的位移场进行了依赖的方法，该方法克服了真实土壤的非透明度引起的测量障碍。方法将玻璃砂和透明孔溶液混合到制造饱和透明的土壤，具有两个粒度（0.1类似于0.5mm和0.5，类似于1 mm）。代替真土，透明土壤用于观察与横向装载桩相互作用的干扰程度。另外，粒子图像速度（PIV）用于捕获透明土壤颗粒的位移。通过MATLAB程序将每个颗粒的位移集成到位移场中。在桩的顶部施加水平力时，桩前面的颗粒被压缩，在某个区域内产生可观察的运动。从位移矢量图，可以看出，随着大颗粒的层厚度增加，桩前面的土壤表面的位移区域增加。压实桩前面的土壤的垂直位移以在水平载荷下形成楔形区域。土壤运动方向与水平平面之间的角度与土壤层的厚度呈正相关。结论透明土壤和粒子图像速度可以帮助揭示横向装载桩周围土壤的位移趋势。基于此，当横向装载堆周围的土壤的位移值和位移角度超过正常范围时，可以提供预警。

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  • 来源
    《Journal of soils & sediments》 |2021年第9期|3072-3083|共12页
  • 作者

    Yuan Bingxiang; Li Zihao; Zhao Zuqing; Ni Hong; Su Zhilei; Li Zhijie;

  • 作者单位

    Guangdong Univ Technol Sch Civil & Transportat Engn Guangzhou Peoples R China;

    Guangdong Univ Technol Sch Civil & Transportat Engn Guangzhou Peoples R China;

    Guangdong Univ Technol Sch Civil & Transportat Engn Guangzhou Peoples R China;

    Guangdong Univ Technol Sch Civil & Transportat Engn Guangzhou Peoples R China|Guangdong Univ Technol Sch Architecture & Urban Planning Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Civil & Transportat Engn Guangzhou Peoples R China;

    Guangdong Univ Technol Sch Civil & Transportat Engn Guangzhou Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Transparent soil; Layered soil; Particle image velocimetry; Displacement field;

    机译：透明土;分层土;粒子图像速度;位移场;

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