It is a very difficult problem of over break in tunnel excavation.

超欠挖一直是隧道开挖中遇到的一大难题.

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Thirdly , the process of tunnel excavation was simulated by employing numerical method.

在工程类比基础上, 运用数值计算方法,模拟隧道开挖过程,分析围岩稳定性.

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Wet sprayed concrete is especially suitable for the support of high bank slope or tunnel excavation.

湿式喷射混凝土特别适用于高边坡支护和隧洞开挖支护.

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The ground settlement of a shallow metro tunnel excavation has important effect on the construction safety.

浅埋暗挖地铁隧道施工期地表沉降量对施工安全具有重要意义.

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On the process of tunnel excavation in high geo - stress zone, surrounding rocks will have dynamic drift.

高 地应力 下的隧洞开挖过程中, 围岩将产生动态的变化.

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