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相关概念视频

Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

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Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
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相关实验视频

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Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
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基于有效优化参数校准方法的DEM模拟,用于在干湿循环下压缩的坡.

Liang Li1,2, Changming Hu3,4, Yili Yuan5

  • 1College of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.

Scientific reports
|July 29, 2024
PubMed
概括

干湿循环会降低压缩的坡,降低安全性. 本研究使用离散元素方法 (DEM) 和一种新的优化技术来分析这些周期下的斜率稳定性,揭示降解趋势.

关键词:
压缩的洛斯 (loess) 是一种压缩的洛斯 (loess).离散元件方法的离散元素方法.优化算法优化算法参数校准参数的校准.斜坡的稳定性 斜坡的稳定性

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Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
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Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
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相关实验视频

Last Updated: Jun 18, 2025

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
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Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
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科学领域:

  • 地质技术工程 地质技术工程
  • 计算力学 计算力学 计算力学

背景情况:

  • 压缩的坡容易受到干湿周期的恶化,这会影响填充斜坡的安全性.
  • 离散元素方法 (DEM) 适用于分析不连续和异型地质技术材料,如.

研究的目的:

  • 使用DEM.分析在干湿周期下压缩的坡的稳定性.
  • 为地质技术分析中的DEM模型开发一种高效的参数优化方法.
  • 引入一种新的指标,即粘合比 (BR),以评估质降解.

主要方法:

  • 实现了一个混乱的粒子群集优化,使用基于sigmoid的加速度系数算法 (CPSOS) 进行DEM参数校准.
  • 引入并使用粘合比 (BR) 来描述干湿周期期间孔隙和裂的发展.
  • 建立了一个基于DEM的斜率稳定性分析模型,用于在循环湿和干燥下压缩的.

主要成果:

  • 该CPSOS方法精确校准了DEM参数,反映了干湿周期下的实际应力-应变和强度趋势.
  • 粘合比率 (BR) 有效量化了由于干湿循环而导致粘合的降解.
  • DEM分析证实,干湿周期对低坡安全因素产生负面影响,周期趋向于稳定.

结论:

  • 拟议的DEM方法与CPSOS校准和BR指标一起提供了一种可靠的方法,用于分析在干湿周期下压缩坡的稳定性.
  • DEM精确模拟了坡上的干湿周期的降解效应,验证了其在地质工程中的应用.
  • 这些发现有助于理解和减轻与潮湿含量波动的环境中的坡相关的风险.