中文摘要：

隧道及地下工程施工的核心目标是保证施工期间围岩的稳定性及运营期间结构的安全性．而现阶段国内外尚没有形成合理的定量判定围岩稳定性的方法。为了能够对围岩稳定性进行较为准确的定量描述．文章以重庆红岩村隧道群为例，引入岩石数值极限分析法来定量描述隧道修建过程中围岩的稳定性，通过岩石极限分析法及室内模型试验结果对围岩稳定性安全系数进行了分析，并通过施工顺序优化验证了支护参数的合理性：得出了洞群施工过程中围岩的破裂面发展规律，为支护措施的选择提供了依据；通过试验验证了岩石极限分析法判定隧道工程中围岩稳定性的合理性。

英文摘要：

The key to the construction of tunnels and other underground works is to ensure rock mass stability during construction and structural safety during operation. While an appropriate quantitative method to assess the rock mass stability is lacking in China at present, a numerical limit analysis of rock masses was adopted to quantitatively describe the stability of a rock mass during tunnel construction using the Hongyancun tunnel group as an example. The results of the limit analysis and indoor model test were that the construction consequences were optimized based on the safety factor of the rock mass stability and the rationality of the support parameters was verified, the development law of the rock mass fracture plane during the tunnel group construction was obtained, and the limit analysis was deemed appropriate to assess rock mass stability during tunnel construction.