scholarly journals Performance characteristics of tunnel boring machine in basalt and pyroclastic rocks of Deccan traps – A case study

2014 ◽  
Vol 6 (1) ◽  
pp. 36-47 ◽  
Author(s):  
Prasnna Jain ◽  
A.K. Naithani ◽  
T.N. Singh
Keyword(s):  
Tunnel Boring Machine ◽  
Deccan Traps ◽  
Performance Characteristics ◽  
Pyroclastic Rocks ◽  
Tunnel Boring

scholarly journals A Case Study on TBM Cutterhead Temperature Monitoring and Mud Cake Formation Discrimination Method

2021 ◽  
Author(s):  
Jie Fu ◽  
Yimin Xia ◽  
Hao Lan ◽  
Dun Wu ◽  
Laikuang lin
Keyword(s):  
Temperature Variation ◽  
Tunnel Boring Machine ◽  
Soil Disturbance ◽  
Tunnel Boring ◽  
Mud Cake ◽  
Cake Formation ◽  
Slurry Shield ◽  
Construction Efficiency ◽  
Discrimination Method

Abstract The mud cake is easily formed during the tunnel boring machine (TBM) excavation in clay soils or rocks containing clay minerals. Mud cake will lead to soil disturbance, clogging cutterhead and even affect the construction efficiency and personnel safety. In this study, a mud cake formation discrimination method based on cutterhead temperature was proposed. An online monitoring system was designed and installed on the slurry shield TBM. The results show that: (a) the cutterhead temperature data can be reliably detected and transmitted by the system; (b) in a tunneling ring, the temperature at some positions of the cutterhead will increase first and then decrease; (c) during the field test, the temperature variation is around 2.5℃ under the normal condition, but the temperature variation will increase more than 50℃ due to the mud cake or geological change; (d) compared with the cooling rate, mud cake formation can be accurately discriminated.

Ground conditioning for earth pressure balance machine tunneling

2001 ◽  
Vol 7 (1) ◽  
pp. 3-11
Author(s):  
Christoph Michael Goss
Keyword(s):  
Earth Pressure ◽  
Tunnel Boring Machine ◽  
Soft Ground ◽  
Pressure Balance ◽  
Machine Method ◽  
Tunnel Boring ◽  
Ground Modification ◽  
Earth Pressure Balance ◽  
Earth Pressure Balance Machine

Abstract The objective of this paper is to provide insight to the application of state-of-the-art ground modification technology for Earth Pressure Balance (EPB) soft ground tunneling. The paper reflects data from a wide array of sources including conference proceedings, trade journal articles, manufacturer publications, books and personal experience. The paper first introduces the concept of soft ground tunneling and then discusses the Earth Pressure Balance Tunnel Boring Machine method. The bulk of the paper is spent discussing ground-conditioning agents, particularly foam. Use of, quantities, theory behind them, environmental impact, lab testing, and effects of foams are described. The paper concludes with a brief case study of the Sheppard Subway Twin Tunnels in Toronto, Canada. Attached to the paper is a comprehensive literature search on EPB tunneling, particularly with regards to foam use.

scholarly journals A case study on TBM cutterhead temperature monitoring and mud cake formation discrimination method

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jie Fu ◽  
Yimin Xia ◽  
Hao Lan ◽  
Dun Wu ◽  
Laikuang Lin
Keyword(s):  
Temperature Variation ◽  
Tunnel Boring Machine ◽  
Soil Disturbance ◽  
Tunnel Face ◽  
Tunnel Boring ◽  
Mud Cake ◽  
Cake Formation ◽  
Construction Efficiency ◽  
Discrimination Method

AbstractThe mud cake is easily formed during the tunnel boring machine (TBM) excavation in clay soils or rocks containing clay minerals. Mud cake will lead to soil disturbance of tunnel face, clogging cutterhead and even affect the construction efficiency and personnel safety. In this study, a discrimination method of mud cake formation based on cutterhead temperature was proposed. An online monitoring system was designed and installed on the slurry balance TBM. The results show that: (a) the cutterhead temperature data can be reliably detected and transmitted by the system; (b) in a tunneling cycle, the temperature at some positions of the cutterhead will increase first and then decrease; (c) during the field test, the temperature variation is around 2.5 °C under the normal condition, but the temperature variation will increase more than 50 °C due to the mud cake or geological change; (d) compared with the cooling rate, mud cake formation can be accurately discriminated.

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