基于熵权物元可拓理论的隧道塌方风险评估

发布时间：2018-04-17 20:06

本文选题：安全工程 + 塌方　；参考：《安全与环境学报》2016年02期

【摘要】：为了准确评价隧道塌方风险等级,降低隧道施工过程中塌方事故的风险,基于熵权物元可拓理论建立了隧道塌方风险分级的评估模型。在统计及综合分析隧道塌方影响因素的基础上,选取围岩级别、跨度、偏压角度、埋深、地下水影响、断层破碎带、施工管理与技术水平7个主要因素作为隧道塌方等级评价指标。借鉴可拓学原理,将熵权法引入可拓学理论中,建立了熵权物元可拓评估模型,对隧道塌方风险进行评估。在熵权物元可拓评估模型中,对定性的指标进行量化,并对各指标进行归一化处理,构建隧道塌方等级评估的经典域、节域和待评物元;为客观、合理地确定指标权重,提出用熵权法计算指标权重;对隧道塌方风险进行关联函数值和关联度分析,确定隧道塌方风险等级及其变量特征值。在工程应用中,对某隧道1#横洞的数据进行统计分析,通过构建的熵权物元可拓评估模型得到某隧道1#横洞的待评物元,从而应用熵权物元可拓理论对某隧道1#横洞进行隧道塌方风险评估,评估结果与实际开挖中毛开挖面围岩不稳定、且时有掉块现象发生的情况一致。研究表明,将熵权物元可拓理论应用于山岭隧道塌方风险评估是可行的,应用该模型得到的隧道塌方等级与实际开挖情况相吻合,很好地预测了隧道施工的安全状态。
[Abstract]:In order to accurately evaluate the risk grade of tunnel collapse and reduce the risk of collapse accident during tunnel construction, an evaluation model of tunnel collapse risk classification is established based on entropy weight matter-element extension theory.On the basis of statistics and comprehensive analysis of the influencing factors of tunnel collapse, the grade of surrounding rock, span, angle of bias pressure, depth of burial, influence of groundwater, fracture zone of fault are selected.Seven main factors of construction management and technical level are used as evaluation index of tunnel collapse grade.Based on the extension theory, the entropy weight method is introduced into the extension theory, and the entropy weight matter-element extension evaluation model is established to evaluate the tunnel collapse risk.In the entropy weight matter-element extension evaluation model, the qualitative indexes are quantified, and each index is normalized to construct the classical domain, section domain and the subject element to be evaluated for the evaluation of tunnel collapse grade, so as to determine the index weight objectively and reasonably.The entropy weight method is used to calculate the index weight, the correlation function value and the correlation degree are analyzed to determine the risk grade and its variable eigenvalue of the tunnel collapse risk.In the engineering application, the statistical analysis of the data of a tunnel 1# transverse tunnel is carried out, and through the constructed entropy weight matter-element extension evaluation model, the evaluation matter-element of a tunnel 1# transverse tunnel is obtained.Thus, the entropy weight matter-element extension theory is applied to evaluate the tunnel collapse risk of a tunnel. The results are consistent with the unstable surrounding rock of the gross excavated surface in actual excavation and the occurrence of the phenomenon of falling blocks.The study shows that it is feasible to apply the entropy weight matter-element extension theory to the risk assessment of landslide in mountain tunnel. The classification of tunnel collapse obtained by the model is in agreement with the actual excavation situation, and the safe state of tunnel construction is well predicted.
【作者单位】：解放军理工大学爆炸冲击防灾减灾国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)项目(2013CB036005)
【分类号】：U458.3

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