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修改的随机介质预测模型用于现有管道下的隐藏地下站的变形反应
Junru Zhang1, Tong Pan1, Kaimeng Ma2
1School of Civil Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
Scientific reports
|June 17, 2023
概括
地铁站建设可能会损坏地下管道,导致沉积和泄漏. 这项研究引入了一个新的模型,根据施工方法预测管道变形,提高城市基础设施的安全性.
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.
- 道道是为了道.
背景情况:
- 城市地铁站的挖掘对交织的地下管道网络产生重大影响,导致定居点,变形和泄漏风险.
- 现有的沉积变形分析方法主要用于圆形室,而不是地铁站几乎方形的截面.
- 地铁站的不同施工方法对覆盖的管道变形产生不同程度的影响.
研究的目的:
- 开发一种改进的理论模型,用于预测地铁站建设造成的地下管道变形.
- 提出纠正系数,考虑不同施工方法对管道变形的影响.
- 用数值模拟和实际工程案例来验证模型的准确性和适用性.
主要方法:
- 修改随机介质模型和佩克公式来预测地面变形.
- 引入各种施工方法的校正系数 (λ 和 η).
- 四种常见的城市道施工方法的数值建模:柱孔,侧孔,中间孔和柱梁弧 (PBA).
- 将模拟结果与模型相匹配,以确定每个方法的校正系数范围.
- 使用实际工程案例验证理论模型.
主要成果:
- 在不同的施工方法下建立了地下管道变形的预测模型.
- 为柱孔,侧孔,中间孔和PBA方法确定了校正系数 (λ和 η).
- 对覆盖管道的影响的下降顺序被确定为:侧孔方法,柱孔方法,中间孔方法和PBA方法.
- 开发的理论模型与实际项目的测量结果有很高的相关性.
结论:
- 改进的随机介质模型有效地预测了各种层次的地下管道变形.
- 建议的校正系数准确地反映了不同施工方法的影响.
- 该模型提供了一种可靠的工具,用于评估和减轻在城市道建设期间对地下管道的风险.
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