挤压性隧道大变形危险性评价的未确知测度评价法研究
周航 , 赵晓彦 , 蒋晖光 , 陈明浩 , 陈仕阔 , 喻炳鑫
地球科学 ›› 2026, Vol. 51 ›› Issue (4) : 1325 -1344.
挤压性隧道大变形危险性评价的未确知测度评价法研究
Unascertained Measure Evaluation Method for Large Deformation Hazard Analysis of Squeezing Tunnel
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为解决复杂艰险山区深埋隧道软岩大变形风险评价中的不确定性难题,提出了基于组合赋权法和未确知测度理论的挤压性隧道大变形评价方法.通过系统研究高地应力深埋隧道大变形特征,建立了由7个核心指标组成的评价体系,包括岩石抗压强度、弹性模量、最大主应力、围强度应力比、地质构造、围岩级别、地下水.通过采用距离函数耦合层次分析法(AHP)与熵权法,构建了主客观组合赋权模型,实现了挤压性隧道大变形风险评价指标的科学权重分配.基于未确知测度理论,建立了挤压性隧道大变形危险性评价模型,通过构建线性单指标测度函数,生成测度评价矩阵,并采用置信度准则实现大变形危险性等级判定.将该模型用于成兰铁路杨家坪隧道,雅鲁藏布江某铁路令达拿、朗镇二号、江木拉隧道等4座典型软岩大变形隧道,并与实际大变形结果进行对比.研究结果表明:该模型的评价结果与现场实际结果总体吻合,证实了该模型用于复杂山区深埋隧道大变形风险评价的有效性及准确度,为复杂山区深埋隧道大变形风险评价开辟了新途径.
Aiming at the many uncertain factors in the large deformation risk assessment of deep lying tunnel in complex mountainous area, this study proposes a novel evaluation methodology for squeezing tunnel large deformations based on combined weighting method and unascertained measure theory. Through systematic investigation of large deformation characteristics in high-stress deep-buried tunnels, an evaluation system comprising seven core indicators was established, including the rock compressive strength, elastic modulus, maximum principal stress, surrounding strength-stress ratio, geological structure, surrounding rock grade, and groundwater. By employing a distance function to integrate the analytic hierarchy process (AHP) with entropy weighting method, it developed a combined subjective-objective weighting model that achieves scientifically validated weight allocation for risk assessment indicators of squeezing tunnel large deformations. Based on unascertained measure theory, this study establishes a risk assessment model for large deformations in squeezing tunnels. The model employs linear single-index measure functions to construct a measurement evaluation matrix, and utilizes confidence criterion for determining deformation risk levels. The model was applied to four representative soft-rock tunnels with large deformations: Yangjiaping Tunnel on the Chengdu-Lanzhou Railway, and Lingdana, Langzhen No.2, and Jiangmula Tunnels on the Southeastern Tibet Railway. Comparative analysis with actual deformation data demonstrated strong agreement between model predictions and field measurements. These results validate the model's effectiveness and accuracy for risk assessment of large deformations in complex mountainous deep-buried tunnels, establishing a novel approach for such geotechnical evaluations.
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国家自然科学基金面上项目(42572379)
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中铁二院科研项目(KSNQ232025)
中铁二院科研项目(KDNQ224006)
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