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-  2018 

岩溶-侵蚀地质下隧道管片上浮影响因素研究
Study on the influencing factors of river tunnel segment floating in karst-erosion geology

Keywords: 管片上浮,云模型,盾构施工,岩溶-侵蚀地质
floating segment
, cloud model, shield construction, karst-eroded geology

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Abstract:

为了及时排除过江隧道盾构掘进时管片上浮的安全隐患,保证隧道施工安全和质量。基于衡阳合江套湘江隧道管片施工实例,考虑过江隧道施工区岩溶-侵蚀耦合作用下的特殊地形,并结合现有隧道施工时影响管片上浮的重要指标,提出一种基于云模型理论的盾构隧道安全评价方法;建立一套影响盾构隧道管片上浮的评价指标体系,并通过云模型算法得出综合评价数字特征并生成云滴图。计算结果表明:基于云模型的安全评价方法能量化管片施工的定性评价标准;采用云模型的评价方法能降低评价标准的主观性,在现有规范的基础上,能为隧道施工过程解决管片上浮提供一定的对策和参考。
This paper aimed at promptly eliminating the security risks of segment floating when the crossed river tunnel shield tunneling, thereby ensuring the safety and quality of tunnel construction. The special terrain under the coupled with karst-erosion in the crossed river tunnel construction area was considered, and the important influencing indicators of segment floating on the existing tunnel construction were combined. A method was proposed for the evaluation of shield tunnel safety based on cloud model theory. A set of evaluation index system was established which affects the floating segment of the shield tunnel. Based on the cloud model algorithm, a comprehensive evaluation of digital features was obtained and cloud drops were generated. Calculation results prove that: (1) Security evaluation method based on loud model can quantify the qualitative evaluation criteria of segment construction; (2) The evaluation method of cloud model can reduce the subjectivity of evaluation criteria. On the basis of existing norms, the proposed method can provide some countermeasures and reference for the construction of the tunnel

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