In order to maintain the safety of underground constructions that significantly involve geo-material uncertainties, this paper delivers a new computation framework for conducting reliability-based design (RBD) of shallow tunnel face stability, utilizing a simplified inverse first-order reliability method (FORM). The limit state functions defining tunnel face stability are established for both collapse and blow-out modes of the tunnel face failure, respectively, and the deterministic results of the tunnel face support pressure are obtained through three-dimensional finite element limit analysis (FELA). Because the inverse reliability method can directly capture the design support pressure according to prescribed target reliability index, the computational cost for probabilistic design of tunnel face stability is greatly reduced. By comparison with Monte Carlo simulation results, the accuracy and feasibility of the proposed method are verified. Further, this study presents a series of reliability-based design charts for vividly understanding the limit support pressure on tunnel face in both cohesionless (sandy) soil and cohesive soil stratums, and their optimal support pressure ranges are highlighted. The results show that in the case of sandy soil stratum, the blowout failure of tunnel face is extremely unlikely, whereas the collapse is the only possible failure mode. The parametric study of various geotechnical uncertainties also reveals that ignoring the potential correlation between soil shear strength parameters will lead to over-designed support pressure, and the coefficient of variation of internal friction angle has a greater influence on the tunnel face failure probability than that of the cohesion.

为了维持明显涉及地质材料不确定性的地下建筑的安全性，本文提供了一种新的计算框架，以简化的一阶逆可靠性方法（FORM）来进行浅层隧道面板稳定性的基于可靠性的设计（RBD）。 ）。分别为塌陷模式和爆破模式建立了定义隧道工作面稳定性的极限状态函数，并通过三维有限元极限分析（FELA）获得了隧道工作面支撑压力的确定性结果。由于逆可靠度方法可以根据规定的目标可靠度指标直接捕获设计支撑压力，因此大大降低了巷道面稳定性概率设计的计算量。通过与蒙特卡洛仿真结果的比较，验证了该方法的准确性和可行性。此外，本研究还提供了一系列基于可靠性的设计图表，以生动地了解无粘性（砂质）土和粘性土层中隧道工作面的极限支撑压力，并重点介绍了它们的最佳支撑压力范围。结果表明，在沙质地层的情况下，隧道工作面极不可能发生井喷破坏，而倒塌是唯一可能的破坏方式。对各种岩土工程不确定性的参数研究还表明，忽略土壤抗剪强度参数之间的潜在相关性将导致支护压力设计过度，