中文摘要：

在盾构隧道施工中使用无轨运输能加快掘进速度，减小对环境扰动，但也会增加运输风险。文章在系统分析无轨运输系统相关因素的基础上，构建了包含运输人员、洞内环境、运输情况及安全管理在内的无轨运输系统安全性二级模糊综合评判模型。针对定量和定性因素并存的特点，分别采用三角形模糊分布和专家打分法获得定量指标和定性指标的隶属度；为了消除单个决策者的主观偏好影响，利用基于群组决策的层次分析法获得权重向量并应用加权平均法进行模糊综合运算。该模型应用于南京地铁十号线过江盾构隧道无轨运输系统安全性评价，评判结果为基本安全。根据结果进行改进后，施工期间未发生安全事故，验证了模型的有效性。

英文摘要：

Trackless transportation adopted in shield tunnel construction accelerates the advance rate and reduces the influence upon the environment while also increasing transportation risks. By analyzing the relative influential factors of a trackless transportation system, a secondary fuzzy comprehensive evaluation model was established, which includes transportation staff, the environment inside the tunnel, transportation conditions and safety manage- ment. Considering the qualitative and quantitative factors, a triangular fuzzy distribution and expert scoring method were used to obtain their membership degrees, respectively. To eliminate the decision maker＇ s subjective prefer- ence, an analytic hierarchy process was used based on group decision making to establish the weight vector and con- duct a fuzzy comprehensive calculation using the weighted average method. This evaluation model was applied to the safety assessment of the trackless transportation system in the shield tunnel of Nanjing metro line 10, and the re- sults show that it is basically safe. No safety accidents occurred during construction after improving this transporta- tion system, which verifies the effectiveness of the evaluation model.