一种新的方法来评估土壤道挖掘引起的连续和不连续的管道变形
Tao Yang1, Bo Deng2, Minghui Yang3,4
1College of Civil Engineering, Hunan University, Changsha, 410082, Hunan Province, People's Republic of China.
Scientific reports
|August 4, 2023
概括
土壤道的挖掘显著地使附近的管道变形. 这项研究开发了一种管道-土壤相互作用模型,以预测管道偏移和关节旋转,并通过实验和现场数据验证它.
科学领域:
- 地质技术工程 地质技术工程
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
背景情况:
- 道挖掘可能会导致严重的地面运动,影响附近的地下基础设施,如管道.
- 土壤和管道之间的相互作用对于评估结构完整性至关重要,特别是在小间隔的地方.
研究的目的:
- 开发和验证一个模型来预测由于土壤道挖掘导致的管道变形.
- 调查各种参数对管道偏斜和关节旋转的影响.
主要方法:
- 使用刚性条形方法建立了管道-土壤相互作用模型,将管道视为简单支的梁.
- 考虑了线性分布的土壤负载,并推导了连续和不连续管道变形的计算方法.
- 进行了对体积损失,旋转刚度,管道截面长度与土壤沉积曲线拐点比率以及土壤弹性模量进行参数研究.
主要成果:
- 管道倾斜和关节旋转随体积损失而增加,随旋转刚度而减少.
- 管道变形和管道截面长度与土壤沉积物拐点的比率之间的关系在"奇数"和"偶数"的情况下有所不同.
- 在"奇异"的情况下,管道偏移随着土壤弹性模量增加而减少,但在"均"的情况下增加,而"奇异"的情况呈现出更大的变形.
结论:
- 拟议的模型准确地预测了由道挖掘引起的管道变形.
- 体积损失和旋转刚度是影响管道响应的关键因素.
- 管道截面长度与土壤沉积点和土壤弹性模块的比对管道变形有复杂的影响,在"奇数"和"偶数"情景中观察到不同的行为.
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