某长大高风险铁路隧道不良地质体超前预报研究

发布时间：2018-07-05 07:45

本文选题：不良地质体 + 预报等级　；参考：《中南大学》2014年硕士论文

【摘要】：摘要：本文以某长大高风险铁路隧道为工程背景,通过查阅了大量的地质预报文献、现场实践和经验总结的方式,对断层破碎带与岩溶等不良地质体的超前预报进行了研究,取得的成果如下： (1)通过分析常用地质预报方法的优缺点及适用范围,结合隧道复杂的地质条件,提出按地质异常的大小程度将地质预报分成四个等级,合理安排相应的预报方法,并应用于长大高风险隧道地质预报,验证了其可行性和有效性。 (2)通过对某长大高风险隧道地质预报工作经验进行总结,提出了地质预报的四个原则：地质为核心、综合预报、有机结合、动态调整。在工程中得到了验证。 (3)通过对断层、岩溶的致灾机理进行分析,系统研究了断层、岩溶的特征及前兆标志,并在长大高风险铁路隧道得到了应用和验证,效果较好。 (4)甲级预报方法为：地质跟踪预报、TSP、地质雷达、红外探测、超前钻孔,可以预报断层与岩溶多方面信息,预报准确性较高,但考虑预报成本和对施工进度的影响,仅推荐在高危险性的大型断层与岩溶发育区段使用。
[Abstract]:Abstract: based on the engineering background of a long and high risk railway tunnel, through consulting a lot of geological forecast documents, field practice and experience summing up, this paper studies the advanced prediction of bad geological bodies such as fault fracture zone and karst. The results obtained are as follows: (1) by analyzing the advantages and disadvantages of the commonly used geological forecasting methods and the applicable scope, combined with the complicated geological conditions of the tunnel, it is put forward that the geological prediction can be divided into four grades according to the magnitude of the geological anomalies. Reasonable arrangement of the corresponding forecasting methods is applied to geological prediction of long and high risk tunnels, which verifies its feasibility and effectiveness. (2) the working experience of geological prediction for a long and high risk tunnel is summarized. Four principles of geological prediction are put forward: geology as the core, comprehensive forecast, organic combination and dynamic adjustment. It has been verified in the project. (3) by analyzing the mechanism of fault and karst disaster, the characteristics of fault, karst and precursor sign are studied systematically, and applied and verified in long and high risk railway tunnel. (4) Grade A prediction methods are: geological tracking prediction TSP, ground penetrating radar, infrared detection, advanced drilling, prediction of faults and karst, and high accuracy of prediction. However, considering the forecast cost and the influence on construction schedule, it is only recommended to use in large fault and karst development areas with high risk.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U452.11

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