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Failure analysis on the fracture of disc cutter in EPB shield machine
Engineering Failure Analysis, 2020Abstract Disc cutter is a tool that EPB shield machine uses in fragment hard rocks in the construction of a subway tunnel in Jinan. Many disc cutter rings fractured during the tunnelling process in April to May 2018. Based on the force characteristics of the cutter ring, a comprehensive analysis was performed to investigate the base materials ...
Yimin Xia, Laikuang Lin, Shifang Zhao
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Model Reference Control for Bulkhead Pressure of EPB Shield in Tunneling
Journal of Convergence Information Technology, 2010The supporting pressure is achieved through control of the incoming and outgoing materials in the head chamber in shield tunneling, i.e., through regulation of the screw conveyor rotation, thrust force of jacks and the excavation advance rate. The discrete state equation of controlling system is derived based on mechanical equilibrium principle.
Zichang Shangguan +3 more
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Determination of the cutterhead torque for EPB shield tunneling machine
Automation in Construction, 2011Abstract Cutterhead torque is an important parameter for the design and operation of earth pressure balance (EPB) shields. Based on the analysis of several completed project cases from job sites, the conventional torque determination model based on experimentation proves rough enough to be improved. Composition and corresponding calculation method of
Hu Shi +3 more
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Method of Calculating Chamber Earth Pressure of EPB Shield
Advanced Materials Research, 2014In order to calculate earth pressure in working chamber, three calculation modes which corresponding to status of elastic balanced, active limit equilibrium and passive limit equilibrium of the soil on the excavation face was built. The relationship of relative displacement between the soil in the chamber and the soil on the excavation face of shallow ...
Bo Liang +4 more
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Adaptability Study of EPB Shield Machine in Clay Stratum in Xuzhou
Geotechnical and Geological Engineering, 2018The shield crosses the expansive clay stratum, which is easy to cause damage to the side wall retaining structure of the tunnel, and it is easy to paste the cutter head during the tunneling, which makes the cutter tool unable to cut the soil normally. In order to study the adaptability of soil pressure balance shield in expansive clay stratum, based on
Shuguang Song +5 more
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Pressure Infiltration Characteristics of Foam for EPB Shield Tunnelling
2019Infiltration of pressurised foam into saturated sand has been investigated in a laboratory setup that provides a comparable hydraulic gradient as in real tunnels. It appears that the permeability of sand for foam decreases as FER of the foam increases until a limit FER (approximately 15 for the foaming agent and sand used in this experiment).
Tao Xu, Adam Bezuijen, Wan-Huan Zhou
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Research on characteristics of deformation in thrust system for EPB shield machines
Tunnelling and Underground Space Technology, 2011The purpose of the research is to investigate into characteristics of deformation in thrust system which reduces the stiffness with the increase of displacement for piston in hydraulic cylinder. Firstly, based on the hyperstatic compatibility, the spatial deforming ellipse for the driving system has been discovered.
Deng Kongshu +3 more
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EPB-shield tunnelling for the Taipei Metro, contract 201A
1994The EPB-shield method has proven itself very well in the specific underground conditions of Taipei. In spite of the restricted and complicated starting conditions and the short tunnel lengths, driving rates which are remarkable for EPB-shield drives could be achieved after certain initial difficulties.
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