试验性调查的环结启发的透在沙子中的实验性调查
Riya Anilkumar1, Alejandro Martinez1
1Department of Civil and Environmental Engineering, University of California Davis, Davis, CA, United States of America.
Bioinspiration & biomimetics
|November 12, 2024
概括
灵感来自植物根,循环结核 (CI) 探头提供高效的土壤透. 这些探头显著减少了土壤表征所需的垂直力,使得在现场应用中可以使用更轻的设备.
科学领域:
- 地质技术工程 地质技术工程
- 土壤力学 土壤力学
- 机器人与生物启发的设计
背景情况:
- 传统的土壤透工具,如孔透测试 (CPT) 需要大量的反应力,通常需要大型钻机用于刚性或密集的土壤.
- 植物根环结,一种自然的螺旋运动,为新的土壤透机制提供了灵感.
- 有效地在现场进行土壤分类和表征对于地质工程,农业和生态学至关重要.
研究的目的:
- 为了研究环节感应 (CI) 探针的有效性,以提高土壤透率.
- 分析探头几何和旋转参数对透力和工作的影响.
- 为了确定CI探头是否可以减少与传统方法相比,透土壤所需的垂直力.
主要方法:
- 实验性透测试在沙土上进行,使用具有不同曲尖角角 (α) 和长度 (L1) 的CI探头进行试验.
- 探测器以恒定的垂直速度 (v) 移动,同时以恒定的角速度 (ω) 旋转.
- 测量包括调动的垂直力 (Fz),扭矩 (Tz) 和机械工作 (WT),作为速度比 (ωR/v),探头几何和土壤相对密度 (DR) 的函数.
主要成果:
- 土壤透阻力独立于垂直速度 (v),但随着探针角度 (α),长度 (L1) 和土壤密度 (DR) 的增加而增加.
- 垂直力 (Fz) 随着速度比 (ωR/v) 的增加而呈指数级下降,而扭矩 (Tz) 最初上升,然后平稳.
- 在特定的 ωR/v 范围内,CI 透实现了比非旋转式 CPT 降低 50% - 80% 的垂直力 (Fz),而总工作 (WT) 仅略有增加.
结论:
- 环绕式透提供了一种更有效的透土壤的方法,需要更低的垂直力.
- 降低的力要求使得可以使用更轻的钻机在现场进行土壤表征和传感器放置.
- CI探测器证明了传统方法的有希望的替代方案,特别是在具有挑战性的土壤条件下.
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