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首页> 外文会议>Proceedings of 2009 international symposium on risk control and managment of design, construction and operation in underground engineering >Numerical Researches on Stability of Tunnel with Cavity Locating Underneath
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Numerical Researches on Stability of Tunnel with Cavity Locating Underneath

机译：空洞位于下方的隧道稳定性数值研究

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摘要

Influence of caves on the project during the failure process is complex and challengeable. In this paper, a RFPAstrength reduction software is used to investigate the stability influence of tunnel with cavity locating underneath. The stability variety rule of road project is analysed in the condition that the diameter and location of the cave are different. The numerical results demonstrate that the change of the cavity's diameter and distance diameter ratio (DDR) is much influential to the stability of the tunnel. The safety coefficient and stability of the tunnel increase with the increase of the cave's diameter and DDR. The influence of the cave's location on the stability of the tunnel is variable. When the diameter of the cave is less than the tunnel's span, the tunnel collapses prior to the cave. The damage propagates gradually to the rock near the cave when the diameter of the cave increases. In contrast, as the diameter of the cave is bigger than the tunnel's span, only a little damage occurs in the surrounding rocks of the tunnel while the cave collapses.
机译：洞穴在破坏过程中对项目的影响是复杂且具有挑战性的。在本文中，使用RFPAstrength降低软件来研究地下洞位于地下的隧道的稳定性影响。分析了洞室直径和位置不同的情况下道路工程的稳定性变化规律。数值结果表明，腔体直径和距离直径比（DDR）的变化对隧道的稳定性影响很大。隧道的安全系数和稳定性随着洞穴直径和DDR的增加而增加。洞穴位置对隧道稳定性的影响是可变的。当洞穴的直径小于隧道的跨度时，隧道在洞穴之前坍塌。当洞的直径增加时，损害逐渐传播到洞附近的岩石。相反，当洞穴的直径大于隧道的跨度时，在洞穴塌陷的同时，在隧道周围的岩石中只会发生很小的破坏。

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