STUDY ON LOAD RESISTANCE CAPACITY OF REPAIRED SHIELD TUNNEL

2020 ◽  
Vol 76 (2) ◽  
pp. I_59-I_66
Author(s):  
Katsuharu SATO ◽  
Daiki KAGA ◽  
Masahiro YOSHIMOTO ◽  
Kenichi ANAN ◽  
Motoi IWANAMI
Keyword(s):  
Load Resistance ◽  
Shield Tunnel

STUDY ON LOAD RESISTANCE CAPACITY OF REINFORCEMENT FOR SHIELD TUNNEL

2020 ◽  
Vol 76 (2) ◽  
pp. I_49-I_58
Author(s):  
Katsuharu SATO ◽  
Daiki KAGA ◽  
Masahiro YOSHIMOTO ◽  
Kenichi ANAN
Keyword(s):  
Load Resistance ◽  
Shield Tunnel

Key Construction Technologies for Large River-Crossing Slurry Shield Tunnel: Case Study

2021 ◽  
Vol 34 (2) ◽  
pp. 04020118
Author(s):  
Song Zhou ◽  
Guan-Lin Ye ◽  
Lei Han ◽  
Wang Jian-Hua
Keyword(s):  
Large River ◽  
Shield Tunnel ◽  
Slurry Shield

Extended electric power sources

2018 ◽  
Author(s):  
T.A. Konev ◽  
V.A. Kuzmin ◽  
E. Yu. Mutovina ◽  
R.D. Puzhaykin ◽  
Vladimir Salomatov
Keyword(s):  
Electric Power ◽  
Electric Current ◽  
Load Resistance ◽  
Active Power ◽  
Operating Voltage ◽  
Power Sources ◽  
Distributed Parameters ◽  
Analytical Expressions ◽  
Characteristic Resistance ◽  
Length Effects

Chemical sources of current are investigated as lines with distributed parameters. Analytical expressions are obtained for the voltage and active power values of the source at different distances from the beginning of the cell as well as dependences of the working voltage and active power on the source length. Effects of a reduction in the operating voltage and active power are due to the flow of electric current along the source during operation. The magnitude of these effects depends not only on the length of the source, but also on the ratio of characteristic resistance to the load resistance.<br>

ESTIMATION OF ADDITIONAL LOAD ON A SHIELD TUNNEL DUE TO GROUND SWELLING BY THE RECOVER OF GROUNDWATER LEVEL

2019 ◽  
Vol 75 (2) ◽  
pp. I_20-I_29
Author(s):  
Shigeaki OKA ◽  
Wei LI ◽  
Yoshihiro ITO ◽  
Shunsuke KANEKO ◽  
Jin SAITO ◽  
...  
Keyword(s):  
Groundwater Level ◽  
Shield Tunnel ◽  
Additional Load

Soil-water inrush induced shield tunnel lining damage and its stabilization: A case study

2020 ◽  
Vol 97 ◽  
pp. 103290 ◽  
Author(s):  
Linchong Huang ◽  
Jianjun Ma ◽  
Mingfeng Lei ◽  
Linghui Liu ◽  
Yuexiang Lin ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Inrush ◽  
Tunnel Lining ◽  
Shield Tunnel

scholarly journals Investigation of Corrosion Rate and Rust Expansion Form of Segment Reinforcement for Shield Tunnel by Combined Action of Soil Loading, Chloride Ion and Stray Current

2021 ◽  
Vol 13 (6) ◽  
pp. 3444
Author(s):  
Zheng Li ◽  
Hao Jin ◽  
Shuo Yu
Keyword(s):  
Corrosion Rate ◽  
Steel Corrosion ◽  
Chloride Ion ◽  
Shield Tunnel ◽  
Uniform Corrosion ◽  
Stray Current ◽  
Soil Loading ◽  
Capacity Degradation ◽  
Expansion Form ◽  
Combined Action

Segment reinforcement corrosion can cause bearing-capacity degradation of shield tunnel, which is unsafe for the metro operation. Therefore, a three-dimensional computational model was proposed in this paper to study the corrosion rate and rust expansion form of segment reinforcement by the combined action of soil loading, chloride ion and stray current. The results show that the arch waist segment steel corrosion rate in the middle is larger than the ends. The rust expansion form of segment reinforcement appears be an eccentric circle. The radius size and circular center are related to the non-uniform corrosion coefficient and the maximum corrosion current density.

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