[1]赵吉,郭佳,苏德慧.基于瞬变流模型的深层排水隧道浪涌风险分析[J].中国给水排水,2021,37(15):110-114.
ZHAO Ji,GUO Jia,SU De-hui.Surge Risk Analysis of Deep Drainage Tunnel System Based on Transient Flow Model[J].China Water & Wastewater,2021,37(15):110-114.
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ZHAO Ji,GUO Jia,SU De-hui.Surge Risk Analysis of Deep Drainage Tunnel System Based on Transient Flow Model[J].China Water & Wastewater,2021,37(15):110-114.
基于瞬变流模型的深层排水隧道浪涌风险分析
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第37卷
期数:
2021年第15期
页码:
110-114
栏目:
出版日期:
2021-08-01
- Title:
- Surge Risk Analysis of Deep Drainage Tunnel System Based on Transient Flow Model
- Keywords:
- deep drainage tunnel; surge; transient flow; hydraulic model
- 摘要:
- 基于对深层排水隧道内浪涌成因及其危害的分析，总结出量化模拟浪涌过程的瞬变流模型所需的必要条件：①可全解一维圣维南方程；②可模拟明满流交替情况；③管道可被切分为若干管节；④模拟步长足够短。对比分析了几种水力模型（InfoWorks ICM、Mike Urban、SWMM5、ITM、TAP）在量化分析瞬变流时的可行性和可操作性，并采用TAP模型模拟某深隧系统在快速填充工况下浪涌的形成过程。结果表明，水流遭遇过程型障碍物和隔断型障碍物时，均会因形成受困气穴而产生不同程度的负压。量化分析结果可为隧道衬砌设计提供参考，以预防负压造成的结构性破坏。
- Abstract:
- Based on analyzing the causes and hazards of surge formation in deep drainage tunnels, the necessary requirements for modeling surge phenomenon were summarized as follows: complete solution of one-dimensional St. Venant equation, being capable of modeling both free flow and pressurized flow, pipes being divided into segments, and short enough modeling step. Feasibility and operability of several hydraulic models (InfoWorks ICM, Mike Urban, SWMM5, ITM and TAP) in quantitative analysis of transient flow were compared and analyzed, and the TAP model was employed to simulate the surge formation process in a deep drainage tunnel system under the condition of rapid filling. Different degrees of negative pressure would be generated due to trapped air pocket when the flow encountered way-along obstacles and separate obstacles. The quantitative analysis results could provide reference for the design of tunnel inner lining to prevent structural damage caused by negative pressure.
更新日期/Last Update:
2021-08-01