基于改进的非线性 FAHP 对邻近现有盾构隧道的盾构施工进行风险评估

IF 6.7 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Tunnelling and Underground Space Technology Pub Date : 2024-10-28 DOI:10.1016/j.tust.2024.106154
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引用次数: 0

摘要

为解决传统模糊层次分析法(FAHP)无法反映突出风险指标对评价结果影响的问题,通过在传统FAHP中引入非线性算子,建立了邻近既有盾构隧道盾构施工的新型风险评估模型。建立了包括 5 个一级风险指标和 21 个二级风险指标在内的既有盾构隧道邻近盾构施工风险评估指标体系和风险评估标准。采用博弈论计算组合权重,综合考虑了主观权重和客观权重的优势。通过云模型计算得到确定性,然后得到成员度向量,构建模糊关系矩阵。引入非线性算子,综合分析权重和模糊关系矩阵。根据最大成员度原则,得到最终的风险等级结果。将新模型应用于与长沙地铁 4 号线相邻的长沙地铁 2 号线盾构施工风险评估案例研究。结果表明(a) 样本 1 和样本 3 的风险等级为Ⅲ级,样本 2 为Ⅱ级。结果与实际情况相符,验证了所采用方法的适用性和准确性。(b) 与传统的 FAHP 相比,新的风险评估模型充分反映了不利风险指标对风险评估的突出影响。因此,新模型最大限度地保证了风险评估结果的合理性,可用于应用和指导其他类似项目。
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Risk assessment of shield construction adjacent to the existing shield tunnel based on improved nonlinear FAHP
To solve the problem that the traditional fuzzy Analytic Hierarchy Process (FAHP) cannot reflect the influence of prominent risk indexes on the evaluation results, a new risk assessment model of shield construction adjacent to the existing shield tunnel was established by introducing nonlinear operators into the traditional FAHP. A risk assessment index system including 5 primary risk indexes and 21 secondary risk indexes and risk assessment criteria were established for shield construction adjacent to the existing shield tunnel. The game theory was used to calculate the combination weights, which comprehensively consider the advantages of subjective and objective weights. The certainty was obtained through cloud model calculation, and then the membership degree vector was obtained to construct the fuzzy relationship matrix. Introducing nonlinear operators to comprehensively analyze the weights and fuzzy relationship matrices. Based on the principle of maximum membership degree, the final risk level result was obtained. The new model was applied to a case study of the risk assessment of shield construction of Changsha Metro Line 2, which is adjacent to Changsha Metro Line 4. The results show that: (a) The risk levels of sample 1 and sample 3 were level Ⅲ and sample 2 was level Ⅱ. The result was consistent with the actual situation which validates the applicability and accuracy of the employed methodology. (b) Compared with the traditional FAHP, the new risk assessment model adequately reflected the prominent impact of adverse risk indexes on risk assessment. Therefore, the new model maximizes the assurance of the rationality of the risk assessment results, which can be feasibly used in applications and guide other similar projects.
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来源期刊
Tunnelling and Underground Space Technology
Tunnelling and Underground Space Technology 工程技术-工程:土木
CiteScore
11.90
自引率
18.80%
发文量
454
审稿时长
10.8 months
期刊介绍: Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.
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