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利用模糊数学中的模糊概率理论,建立了软土隧道结构性态的模糊概率综合评估模型。模型应用模糊权重的概念,充分考虑了权重的模糊性以避免权重取值的不确定性。结合影响软土隧道结构性态的主要因素,选取渗漏水范围、横向水平位移、隧道断面收敛位移和钢筋泄露电流密度为主要评估影响因子,同时将隧道结构性态风险等级划分为优秀、良好、一般和较差4个等级,进而使评估结果更为精细。算例分析表明了文中方法对软土隧道结构性态风险评估的合理性和有效性。
By using the fuzzy probability theory in fuzzy mathematics, the fuzzy probability comprehensive evaluation model of the soft soil tunnel structural behavior is established. The model applies the concept of fuzzy weight, which fully considers the ambiguity of weight to avoid the uncertainty of weight value. Combined with the main factors affecting the structural behavior of soft soil tunnel, the influence factors of seepage water range, horizontal horizontal displacement, convergence displacement of tunnel section and steel leakage current density are selected as main factors, and the structural risk level of tunnel is divided into excellent and good , General and poor 4 levels, and thus make the assessment results more refined. The case study shows that the proposed method is reasonable and effective in assessing the structural state risk of soft soil tunnels.