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 15):110-114.
Surge Risk Analysis of Deep Drainage Tunnel System Based on Transient Flow Model
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
15 15
Page:
110-114
Column:
Date of publication:
2021-08-01
- Keywords:
- deep drainage tunnel; surge; transient flow; hydraulic model
- 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.
Last Update:
2021-08-01