一种运营地铁盾构隧道结构健康状况评价方法

为解决多指标对盾构隧道结构健康状况的综合影响以及人的有限理性对评价结果的不精确性问题,提出一种基于可能性理论及前景理论的地铁运营盾构隧道结构健康状况评价方法。首先在已确定盾构隧道结构健康状况等级的基础上,构造各健康状况等级可能性分布;然后基于专家期望值得到各监测指标的参考分布函数;基于可能性理论,得到指标监测结果的可能性分布,构造出监测指标与健康状况等级可能性分布函数之间的映射关系;最后,基于前景理论对盾构隧道结构健康状况进行评价。该方法运用于软土盾构隧道结构健康状况的评价,验证了其有效性及实用性,为运营盾构隧道结构健康评价提供了新方法。

A Method for Evaluating the Health Condition of Operation Metro Shield Tunnel Structure

To solve the comprehensive influence of multi index on the shield tunnel structure health status and people’s limited rationality of the evaluation results, a health status evaluation method on shield tunnel structure based on the possibility theory and prospect theory is proposed in this paper. Firstly, the probability distribution of health status is constructed on the basis of the health status of the structure of the shield tunnel; Then the reference distribution function of each monitoring index is obtained based on the expectation of the experts; Based on the probability theory, the probability distribution of the monitoring results is obtained, and the mapping relationship between the monitoring index and the probability distribution function of the health status level is constructed; Finally, evaluating the health status of the shield tunnel structure based on the prospect theory. This method is successfully applied into evaluating the health condition of shield tunnel structure in soft soil region, which verifies the effectiveness and practicability of the method and provides a new method for the structural health evaluation of the operation of the shield tunnel.