Results 211 to 220 of about 4,052 (264)
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International Journal for Numerical and Analytical Methods in Geomechanics, 2003
AbstractThis paper proposes a two‐dimensional finite element model for the analysis of shield tunnels by taking into account the construction process which is divided into four stages. The soil is assumed to behave as an elasto‐plastic medium whereas the shield is simulated by beam–joint discontinuous model in which curved beam elements and joint ...
Zhu, HH +5 more
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AbstractThis paper proposes a two‐dimensional finite element model for the analysis of shield tunnels by taking into account the construction process which is divided into four stages. The soil is assumed to behave as an elasto‐plastic medium whereas the shield is simulated by beam–joint discontinuous model in which curved beam elements and joint ...
Zhu, HH +5 more
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Predictive maintenance of shield tunnels
Tunnelling and Underground Space Technology, 2013Abstract Scientific maintenance methodologies are specially needed to enhance system reliability and safety, reduce maintenance manpower, spares, and repair costs, eliminate scheduled inspections, and maximize lead time for maintenance and parts procurement.
Yong Yuan, Xiaomo Jiang, Xian Liu
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Shield Tunnel Construction in Centrifuge
Journal of Geotechnical and Geoenvironmental Engineering, 1999A large number of centrifuge model tests for simulating the shield construction process in dry sand was carried out by using a newly developed 100 mm diameter miniature shield tunnel. Different construction processes were modeled by three series of tests. A buried tube test was conducted to measure the lining stress under a centrifugal acceleration, a “
Toshi Nomoto +4 more
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Design of Shield Tunnel Structures
2019Shield machine is a steel circular protective device or mobile support. It is suitable for tunnel construction in soft aquifers, especially under the riverbed, seabed, and urban residential areas. The underground structure constructed by the shield method can be simply termed as the shield lining.
Zhen-Dong Cui +4 more
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Effects of above-crossing tunnelling on the existing shield tunnels
Tunnelling and Underground Space Technology, 2016Abstract Tunnelling in the dense urban areas frequently results in over-crossing or bypassing the existing tunnels. It is obvious that the over-crossing tunnelling will adversely affect and even damage the existing tunnels if the induced deformation exceeds the capacity of tunnel structures. Increasing concerns have been raised about the interactions
Rongzhu Liang +3 more
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Study on Shiziyang Tunnel Engineering Geology and Shield Tunneling
Deep and Underground Excavations, 2010The Shiziyang tunnel is in passenger dedicated rail line connecting Guangzhou, Shenzhen and Hong Kong. It will be the longest underwater tunnel and have the highest technical level in China. This article describes the tunnel’s design and construction schemes, analyzes and summarizes the characteristics of this tunnel, in terms of its geological and ...
Xinan Yang +3 more
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