市政管线的电磁探测方法研究与应用

发布时间：2018-01-16 04:32

本文关键词：市政管线的电磁探测方法研究与应用　出处：《成都理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着城市建设的高速发展,城市地下空间的建设也开始了高速发展。地铁、隧道、管廊等已成为一个城市的基础配置。由于历史发展等原因,地下管线给城市地下基础建设遗留下了很多问题。为适应城市的建设,急需开展城市地下管线基础信息普查工作。地球物理勘探方法是目前地下管线探测的主要方法之一,由于这类方法具有快速、无损、非开挖等优点,因此得到了越来越广泛的应用。经调查,城市地下管线可以分为两大类,具有导电性的金属管线与弱导电性的非金属管线,通过各自的物理敏感性参数优选了两种最合适的地球物理勘探方法,对市政管线进行了具有针对性的研究与应用。对于金属管线来说,电磁法是最直接最便捷的一种地球物理勘探方法,具有简单、方便、成本低、效率高、精度准确等优点。本文通过电磁法的理论探讨和野外工作实践,对基于电磁法原理的管线仪进行了定位、定深等方法的深入研究,归纳总结了利用管线仪进行管线探测的方法技术,并在研究区对该方法进行了试验,验证了其方法的有效性。对于非金属管线来说,电磁波法是最为简单、高效、无损的方法,但由于其能量衰减快,地下环境复杂等使电磁波法的应用受到了一些限制,在实际的工作中还存在了许多问题等待解决。本文通过地质雷达探测管线的理论探讨,利用电磁波正演模拟技术,得到了各种地下管线的正演成像剖面,为管线探测中的实际资料解释提供了依据。同时利用已知管线的信息,研究地质雷达响应特征,指导管线探测与识别,通过类似地震资料处理方法,对雷达资料进行了高分辨率处理,提高管线探测中的解释精度。将总结出的方法技术及流程应用到了重庆市某地区管线普查项目中,并取得了良好的应用效果,顺利地完成了普查工作。
[Abstract]:With the rapid development of urban construction, the construction of urban underground space has begun to develop at a high speed. Subway, tunnel, pipe corridor and so on have become the basic configuration of a city, due to historical development and other reasons. The underground pipeline has left a lot of problems to the urban underground infrastructure construction, in order to adapt to the construction of the city. Geophysical exploration method is one of the main methods of underground pipeline exploration at present, because this method has the advantages of fast, nondestructive, non-excavation and so on. As a result, it has been used more and more widely. Through investigation, the underground pipelines can be divided into two categories: metal pipelines with electrical conductivity and non-metal pipelines with weak conductivity. Two kinds of most suitable geophysical exploration methods are selected according to their physical sensitivity parameters, and the research and application of municipal pipelines are carried out, especially for metal pipelines. Electromagnetic method is the most direct and convenient geophysical exploration method, which has the advantages of simplicity, convenience, low cost, high efficiency, accuracy and so on. In this paper, the location and depth determination methods of the pipeline instrument based on the electromagnetic method are studied, and the method and technology of pipeline detection by using the pipeline instrument are summarized and tested in the research area. The effectiveness of the method is verified. Electromagnetic wave method is the most simple, efficient and lossless method for non-metal pipeline, but its energy decay is fast. The application of electromagnetic wave method is limited by the complex underground environment, and there are still many problems to be solved in the practical work. The forward imaging profiles of various underground pipelines are obtained by using electromagnetic wave forward modeling technology, which provides a basis for the interpretation of actual data in pipeline detection. At the same time, the information of known pipelines is used. The response characteristics of GPR are studied to guide the pipeline detection and identification. The radar data are processed with high resolution through similar seismic data processing methods. In order to improve the interpretation accuracy of pipeline detection, the method, technology and flow are applied to the pipeline survey project in a certain area of Chongqing, and the good application effect is obtained, and the census work is successfully completed.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P631.325

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