被动地压分析考虑不和土壤的液压和机械歇斯底里
1Water Resources Engineering Department, College of Engineering, Salahaddin University, Erbil, Iraq.
这项研究研究了土壤水特性曲线 (SWCC) 歇斯底里和墙壁摩擦如何影响被动地压. 歇斯底里和摩擦显著增加了被动推力 (Pp),并提供了设计图表.
科学领域:
- 地质技术工程 地质技术工程
- 土壤力学 土壤力学
- 土木工程 土木工程是指土木工程.
背景情况:
- 土-水特征曲线 (SWCC) 歇斯底里影响不和土壤的行为.
- 了解被动土压对于保持墙壁设计至关重要.
- 之前的模型经常简化或忽略歇斯底里效应.
研究的目的:
- 为了研究被动地压的机械特性,考虑SWCC的hysteresis.
- 分析液压 (干燥/湿) 和机械歇斯底里作用的影响.
- 通过参数研究和图表提供设计见解.
主要方法:
- 使用上限定理进行分析.
- 对空气输入值 (AEV),墙壁摩擦 (δ) 和吸气进行了参数研究.
- 将数值结果与基于极限平衡方法的方程进行比较.
主要成果:
- SWCC 的歇斯底里和墙壁摩擦显著影响了被动推力 (Pp).
- 增加AEV从10到20kPa (在Hw = -2m时) 增加了Pp的1.31倍.
- AEV和δ的联合效应显示出实质性的影响;Pp增加了4.14倍 (在Hw = -3 m),比较极端情况.
结论:
- 在被动地压计算中,SWCC的歇斯底里和墙壁摩擦是关键因素.
- 拟议的设计图为工程师提供了实用工具.
- 精确考虑hysteresis是必要的可靠的支墙设计.
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