隧道超前预报地质雷达波信号处理与特征信息识别

发布时间：2018-05-14 15:12

本文选题：探地雷达 + 不良地质体　；参考：《长沙理工大学》2015年硕士论文

【摘要】：近年来,隧道及地下工程建设作为一项民生建设项目,其发展加快了国民经济和社会的发展。但是随着地质与环境条件的复杂化,建设隧道及地下工程难度加大,工程事故也屡见不鲜。隧道地质超前预报由于在技术上保障了隧道及地下工程建设的安全和进度,成为施工过程中不可取代的环节。探地雷达技术以其探测效率高、探测效果好在近年来不仅在隧道地质超前预报领域有较多的应用,还在探测隐蔽物工程中有广泛应用。但在隧道中的应用也存在诸多的不足,例如电磁波容易受到干扰、信号不稳定、探测深度不足、缺乏规范的解译技术、预报不能定量化等。本文依托长湘高速公路狮子垄隧道工程实例,针对软弱围岩隧道工程的要求以及探地雷达对数据处理解译方面的不足,主要的工作内容概述如下:(1)总结探地雷达运用于隧道地质超前预报电磁波在不同环境下的传播特征以及规律,从理论上论证探地雷达运用于隧道地质超前预报的可行性和优越性。(2)结合工程实际情况和理论,设计了一套针对狮子垄隧道不良地质体探测的的参数取值,并运用于实际,对富水带和节理裂隙带在不同条件下进行探测。结合长湘高速以及其他类似工程经验,采用Radan5.0数据处理软件,对狮子垄隧道富水带和节理裂隙带探测数据进行处理。(3)针对隧道施工过程中常遇到的不同程度富水带、节理裂隙带等特殊地质情况下,对雷达波波形堆积图上特征信息进行归纳总结。采用频谱分析和复信号分析技术进行频率、振幅和相位的定量分析,对主频值和频带带宽进行定量研究,进一步提高了特殊地质条件下超前预报的准确性。
[Abstract]:In recent years, the construction of tunnel and underground engineering, as a project of people's livelihood, has accelerated the development of national economy and society. However, with the complexity of the geological and environmental conditions, the difficulty of building tunnel and underground engineering is more difficult, and the engineering accidents are also common. The tunnel geological prediction has ensured the tunnel and underground because of the technology. The safety and progress of engineering construction have become an indispensable link in the construction process. The ground penetrating radar technology, with its high detection efficiency and good detection effect, has not only been widely used in the field of tunnel geological prediction in recent years, but also widely used in the detection of concealment engineering. However, there are many shortcomings in the application of the tunnel. For example, the electromagnetic wave is easily disturbed, the signal is unstable, the detection depth is insufficient, the standard interpretation technology is lacking, and the prediction can not be quantified. This paper is based on the example of the lion ridge tunnel project of Changxiang expressway, and summarizes the main work content in view of the requirements of the tunnel engineering of the weak surrounding rock and the shortcomings of the ground penetrating radar in the interpretation of data processing. The following are as follows: (1) the feasibility and superiority of ground penetrating radar used in tunnel geological prediction are theoretically proved by using GPR to predict the propagation characteristics and laws of electromagnetic waves in different environments. (2) a set of detection of bad geological bodies for the lion ridge tunnel is designed in combination with the actual situation and theory of the project. The value of the parameters, and used in practice, to detect the rich water zone and joint fracture zone under different conditions. Combined with the Long Xiang high-speed and other similar engineering experience, the Radan5.0 data processing software is used to locate the exploration data of the rich water zone and the joint fissure zone of the lion ridge tunnel. (3) the difference in the tunnel construction process is different. The characteristic information on the radar wave shape accumulation chart is summed up under the special geological conditions such as the degree of water rich zone and the joint fracture zone. The frequency, amplitude and phase of the frequency, amplitude and phase are quantitatively analyzed by spectrum analysis and complex signal analysis technology. The quantitative analysis of the main frequency and band bandwidth has been carried out to further improve the pre pre preconditioning under special geological conditions. The accuracy of the newspaper.

【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U452.11

【参考文献】