关同黄土隧道洞口拱顶坍塌原因分析和处置方法研究

发布时间：2018-04-17 11:47

本文选题：黄土隧道塌方 + 塌方影响因素　；参考：《长安大学》2014年硕士论文

【摘要】：本文以十堰至天水国家高速公路甘肃段控制性工程关同隧道左线出口拱顶坍塌为研究对象，在对我国以往黄土隧道塌方事故调查的基础上，利用地质雷达探测关同隧道左线出口塌方段降雨前后含水量的变化，并结合塌方力学机理分析、数值模拟分析等手段，，从理论上分析塌方原因，结果表明：土体含水量的增大和黄土特殊的物理力学性质是导致隧道塌方的关键因素，同时洞口CD开挖法产生的偏压和人为因素也是导致隧道塌方的重要原因。并由此提出相应的处治方法。塌方处置后，通过实地监控量测和治理后数值模拟分析，对塌方治理效果进行评估，证实本次坍塌处理方案的有效性。
[Abstract]:In this paper, the collapse of the left exit dome of Guantong Tunnel in the control project of Gansu section of Shiyan to Tianshui State Expressway is taken as the research object. Based on the investigation of the previous collapse accidents of loess tunnel in China,By using GPR to detect the change of water content before and after rainfall at the left exit of Guantong Tunnel, combined with mechanical mechanism analysis and numerical simulation analysis of collapse, the causes of collapse are analyzed theoretically.The results show that the increase of soil water content and the special physical and mechanical properties of loess are the key factors leading to tunnel collapse, and the bias and artificial factors caused by CD excavation are also the important causes of tunnel collapse.From this, the corresponding treatment method is put forward.After the collapse is disposed, the effectiveness of the collapse treatment is evaluated by monitoring and measurement on the ground and numerical simulation analysis after treatment, and the effectiveness of the scheme is verified.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U458.3

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