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The external water pressure on a deep buried tunnel in fractured rock
Tunnelling and Underground Space Technology, 2015Abstract Underground tunnels are increasingly built at greater burial depths for water conservancy and hydropower projects. The safety of these tunnels is threatened by high external water pressure during construction and reservoir operations. In this research, external water pressure was considered to be a relative incremental water pressure ...
Yong Huang +4 more
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Transverse extent of numerical model for deep buried tunnel excavation
Tunnelling and Underground Space Technology, 2019Abstract Numerical simulation has been widely used for predicting rock mass convergence during tunnel excavation. Considering that tunnel construction is a three-dimensional (3D) process, the 3D numerical analysis, instead of the plane-strain models, are commonly employed in engineering practice.
Kai Su +5 more
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Blasting Vibration Study of a Deep Buried Tunnel Entrance
2018Taking the Luo-Sha tunnel as the research site, we monitored the blasting vibration in a tunnel portal and performed time-frequency analysis on the monitoring data. During the time domain analysis, the maximum horizontal radial component of the blasting vibration velocity is greater than the maximum horizontal tangential component, and the maximum ...
Jiang-Bo Xu, Chang-Gen Yan, Hang Yuan
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Temperature effect of rock burst for hard rock in deep-buried tunnel
Natural Hazards, 2014Much research has been conducted on the influence of rock burst mechanisms and temperature on the mechanical properties of hard rock while research on the effect of temperature on rock bursts is scarce. Therefore, this paper focuses on Rock Burst Proneness Index tests and acoustic emission (AE) tests under the action of high temperature.
Guoqing Chen +4 more
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Computers and Geotechnics, 2019
Abstract For deep-buried shield tunnels in sand, it is difficult to determine the loosening earth pressure in front of tunnel face due to the significant soil arching effect during excavation. Considering the soil arching effect and the correlation between the relative displacement of soil and the arching deformation patterns, this paper proposed a ...
Tao Wan, Pengfei Li
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Abstract For deep-buried shield tunnels in sand, it is difficult to determine the loosening earth pressure in front of tunnel face due to the significant soil arching effect during excavation. Considering the soil arching effect and the correlation between the relative displacement of soil and the arching deformation patterns, this paper proposed a ...
Tao Wan, Pengfei Li
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Artificial Neural Network for Prediction of Rockburst in Deep-Buried Long Tunnel
2005Rockburst is a main engineering geological problems in deep-buried long tunnels. Rockburst phenomena have been analyzed, assumptions and criteria have been presented from the perspectives of strength, stiffness, energy, steadiness, fracture, damage, fractal and catastrophe, etc.
Xiaohong Li 0011 +3 more
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Experimental study on similarity materials for soft rock of deep-buried tunnels
Journal of Coal Science and Engineering (China), 2011When every parameter is properly scaled down in accordance with some similarity coefficients, it is possible to study the physical-mechanical properties of rock mass with a scale model. To identify the key mechanisms of soft rock in deep buried tunnels, the proper sand, binder and ratio were selected.
Yu Zhao, Hai-you Peng
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Deformation Characteristics Research on Gravel Bed for Deep Buried Immerse Tunnel
Applied Mechanics and Materials, 2013Taking some deep buried immerse tunnel as background, deformation characteristics of foundation gravel bed is discussed by physical model test. The results show that small particle size gradation is not suitable for the foundation gravel bed, and compared with the non-groove gravel, compression modulus is greatly reduced in case of gravel with groove ...
Yong Wang, Cai Hong Sun
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Rock Mechanics and Rock Engineering, 2020
Delayed rockburst occurs after the stress adjustment of surrounding rocks with discontinuous microseismicity, which is difficult to predict accurately. To predict and prevent the occurrence of the delayed rockbursts, study on time behavior of the surrounding rock failure and the mechanism behind the delayed rockbursts is necessary.
Shichao Zhang +4 more
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Delayed rockburst occurs after the stress adjustment of surrounding rocks with discontinuous microseismicity, which is difficult to predict accurately. To predict and prevent the occurrence of the delayed rockbursts, study on time behavior of the surrounding rock failure and the mechanism behind the delayed rockbursts is necessary.
Shichao Zhang +4 more
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Numerical Investigation into Rockburst Proneness of Deep-Buried Tunnels with Arch-Shaped Wall
Advanced Materials Research, 2011During the construction of the deep-buried tunnels, high surrounding rock stress and the rockburst are the important factors affecting the stability of surrounding rock. Xiabandi hydraulic engineering is the key project in Tarim River basin. Due to the deep buried excavation, rockburst is particularly prominent and should be received adequate attention.
Xin Yu Wang, Zhu Shan Shao, Yu Ming Cui
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