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Analysis of Overflow Capacity in Typical Section of Long Distance with Variable Diameter and Roughness Non-pressure Tunnel
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Juan LI1, 2, 3, Yin-xin QI1, Jiang-feng LI1, Hui YIN1
Water Resources and Power | 2023, 41(11) : 125 - 128
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Water Resources and Power | 2023, 41(11): 125-128
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Analysis of Overflow Capacity in Typical Section of Long Distance with Variable Diameter and Roughness Non-pressure Tunnel
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Juan LI1, 2, 3, Yin-xin QI1, Jiang-feng LI1, Hui YIN1
Affiliations
  • 1.Xinjiang Institute of Water Resources and Hydropower Research, Urumqi 830000, China
  • 2.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
  • 3.Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention, Urumqi 830052, China
Published: 2023-11-25 doi: 10.20040/j.cnki.1000-7709.2023.20230116
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In order to study whether the original design flow can be met after the lining scheme of sections of a long distance non-pressure diversion tunnel is changed, the flow capacity of typical sections of the tunnel was analyzed by model test and theoretical calculation. There are 4 tunnel diameters and 2 roughness in the typical section of the tunnel. In order to meet the conditions of similar resistance, different materials were compared and tested, and the roughness was determined. Through testing and analyzing the flow capacity and flow characteristics at three operating conditions, it is concluded that the flow can be safely passed under operating condition 1, and the clearance margin of some tunnel sections under operating condition 2 is insufficient, with the minimum margin of 14.39%. Most tunnel sections under operating condition 3 do not meet the safety flow. Comparing the test and theoretical calculation, the results of the two are relatively close, and the test value is relatively safe, which can provide a theoretical basis for the construction and operation of the project.

non-pressure tunnel  /  roughness  /  model test  /  theoretical calculation  /  overflow capacity
Juan LI, Yin-xin QI, Jiang-feng LI, Hui YIN. Analysis of Overflow Capacity in Typical Section of Long Distance with Variable Diameter and Roughness Non-pressure Tunnel[J]. Water Resources and Power, 2023 , 41 (11) : 125 -128 . DOI: 10.20040/j.cnki.1000-7709.2023.20230116
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20230116
  • Receive Date：2023-02-01
  • Online Date：2026-01-27
  • Published：2023-11-25
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History
  • Received：2023-02-01
  • Revised：2023-03-05
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Affiliations
    1.Xinjiang Institute of Water Resources and Hydropower Research, Urumqi 830000, China
    2.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
    3.Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention, Urumqi 830052, China
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https://castjournals.cast.org.cn/joweb/sdnykx/EN/10.20040/j.cnki.1000-7709.2023.20230116
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表12种不同金属材料的力学参数
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Number of
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Number of
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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