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contributor authorYujun Zuo
contributor authorTao Xu
contributor authorYongbin Zhang
contributor authorYiping Zhang
contributor authorShucai Li
contributor authorGaofeng Zhao
contributor authorChunchun Chen
date accessioned2017-05-08T21:45:24Z
date available2017-05-08T21:45:24Z
date copyrightAugust 2012
date issued2012
identifier other%28asce%29gm%2E1943-5622%2E0000167.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/61556
description abstractZonal disintegration around a deep excavated tunnel is a characteristic of the rock mass intense fracturing phenomenon. In this paper, three-dimensional numerical tests on the failure processes of rock samples containing vertical wall semiarched tunnels are performed with the three-dimensional Realistic Failure Process Analysis (RFPA3D)–Parallel system model running on a Lenovo 1800 cluster, in order to study the configuration of zonal disintegration within the rock mass around the deep excavated tunnels. This study focuses on the zonal disintegration phenomenon in the tunnel longitudinal direction and the time-lag effect. Numerical results show that the microcracking in the disintegration zone within the model decreases gradually from the tunnel surface to the interior of the model along the tunnel longitudinal direction; the disintegration zone within the model also reduces, but the diameter of the disintegration zone becomes larger. Numerical results also indicate that an apparent time lag exists in the forming of the zonal disintegration. In other words, the zonal disintegration does not occur instantly after the excavation. Therefore, this time lag has to be considered carefully in the support design of the deep excavated tunnels.
publisherAmerican Society of Civil Engineers
titleNumerical Study of Zonal Disintegration within a Rock Mass around a Deep Excavated Tunnel
typeJournal Paper
journal volume12
journal issue4
journal titleInternational Journal of Geomechanics
identifier doi10.1061/(ASCE)GM.1943-5622.0000155
treeInternational Journal of Geomechanics:;2012:;Volume ( 012 ):;issue: 004
contenttypeFulltext


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