高頻大地電磁論文高頻大地電磁法在隧道勘察與探測中的應(yīng)用研究

1、高頻大地電磁論文：高頻大地電磁法在隧道勘察與探測中的應(yīng)用研究【中文摘要】近年來,鐵路建設(shè)工程量大且項目繁多,其中長大隧道的地質(zhì)勘探一直以來都是較為復(fù)雜的工程難題。本文結(jié)合某隧道的實際應(yīng)用情況,探討了高頻大地電磁測深的基本理論,介紹了近年來應(yīng)用較為普遍的電磁儀器：EH4電導(dǎo)率成像儀,并對該儀器的相關(guān)理論和方法作了較為詳細(xì)的研究,包括基本理論、工作方式和方法、數(shù)據(jù)采集和數(shù)據(jù)處理、相關(guān)技術(shù)研究等內(nèi)容。最后,將EH4系統(tǒng)應(yīng)用于工程實例,著重對成果圖進行分析解釋,在此基礎(chǔ)上劃分圍巖等級,并對工程施工提出合理建議。EH4系統(tǒng)具有較好的應(yīng)用效果和前景,但由于技術(shù)封裝十分嚴(yán)密,目前對其認(rèn)識尚有不足,因此,對其

2、技術(shù)進行深入細(xì)致的研究則是本文的重點。首先研究其輸出文件內(nèi)容成為本文的一個重點,如果能詳細(xì)了解該內(nèi)容,不僅能為后續(xù)數(shù)據(jù)處理提供保障,還能為開發(fā)新的處理方法提供依據(jù)。其次,希爾伯特-黃變換(HHT)中關(guān)于消除噪音的研究是本文的另一個重要內(nèi)容,希爾伯特-黃變換是一種能夠處理非線性非平穩(wěn)時間序列的方法,目前該技術(shù)在許多領(lǐng)域應(yīng)用廣泛。通過了解與分析其理論基礎(chǔ),結(jié)合實例和EH4系統(tǒng)中數(shù)據(jù)處理功能進行了分析與論證,并得到了較好的結(jié)果。論文主要研究內(nèi)容和成果包括：(1)詳細(xì)地探討了EH4系統(tǒng)的整個數(shù)據(jù)采集和數(shù)據(jù)處理過程。包括自帶軟件IMAGEM的操作和反演成圖等技術(shù)；(2)成功的讀取了EH4文件中的Y文件,

3、并詳細(xì)分析了輸出文件的內(nèi)容；(3)找到簡單有效的方法進行了地形修正,并能很好的應(yīng)用于實際工作中；(4)通過編制程序做出了希爾伯特譜和邊際譜圖。為數(shù)據(jù)處理中消除噪音提供了新的方法；(5)結(jié)合工程實例分段分析物探成果圖,一定程度上為物探解釋工作提供了參照?！居⑽恼縄n recent years, railway construction has a large amount of various projects, long tunnel of geological exploration has always been complex engineering problems. The pa

4、per connected with the practical application of a tunnel in closely. First of all, The paper has studied the basic theory of the high-frequency magnetotelluric, then introduced EH4 conductivity imaging device what has more general used in recent years as electromagnetic devices and made a more detai

5、led study of theories and methods of the instrument including basic theory, working methods and methodology, data acquisition and data processing and related technology research and so on. Finally, the EH4 system has used in engineering example, focusing on analysis and interpretation of the results

6、 graph, and then based on the division of rock class, and put forward reasonable proposals for construction.EH4 system has a good application effect and prospect, but we know little about it at present because of the technology encapsulation is very rigorous. So we have to research its detailed tech

7、nical in depth. Its content of output file is one key in this paper. If the content could be understood clearly, it can guarantee the follow-up data processing, and also can provide the basis for creating new processing method. In addition, eliminate noise research section in Hilbert-Huang Transform

8、 (HHT) is another important content in this paper. Hilbert-Huang Transform is a nonlinear method which can handle non-stationary time series. This technology is in the ascendant and used widely in many areas at present. Its theoretical basis is studied, and then through the analysis the application

9、of data processing in EH4 system combined with examples, and the results is obtained satisfactorily by practice.The major research content and the achievements of the thesis are depicted as follows:(1) We have discussed the entire data acquisition and data processing of EH4 system in detail and the

10、operation and inversion mapping techniques on IMAGEM;(2) Has read Y documents of EH4 file successfully, and analysis the output files in detail;(3) To find a simple and effective method of terrain correction, and can be well applied in practical work; (4) Made the Hilbert spectrum and marginal spect

11、rum by programming, and provides a new approach To eliminate the noise in the data processing;(5) Segment analysis the Figure of Geophysical results with an engineering example, to some extent provided a reference for the geophysical interpretation.【關(guān)鍵詞】高頻大地電磁 EH4系統(tǒng) 功率譜 希爾伯特-黃變換 反演斷面圖【英文關(guān)鍵詞】HMT EH4

12、system power spectrum Hilbert-Huang Transform inversion sectional drawing【目錄】高頻大地電磁法在隧道勘察與探測中的應(yīng)用研究摘要6-7Abstract7-8第1章 緒論11-161.1 研究背景和研究意義11-121.2 大地電磁測深法的研究現(xiàn)狀12-141.2.1 大地電磁測深法的國外研究現(xiàn)狀12-131.2.2 大地電磁測深法的國內(nèi)研究現(xiàn)狀13-141.3 論文主要內(nèi)容14-16第2章 高頻大地電磁測深理論基礎(chǔ)16-222.1 電磁波傳播理論和亥姆霍茲方程16-182.2 視電阻率和相位18-22第3章 EH4電導(dǎo)率成

13、像系統(tǒng)及特點22-303.1 EH4電導(dǎo)率成像系統(tǒng)簡介22-243.2 EH4電導(dǎo)率成像系統(tǒng)理論依據(jù)24-253.3 EH4系統(tǒng)工作方式及野外工作方法25-303.3.1 EH4系統(tǒng)工作方式25-263.3.2 EH4系統(tǒng)野外工作方法26-30第4章 EH4系統(tǒng)的數(shù)據(jù)采集與數(shù)據(jù)處理30-414.1 EH4系統(tǒng)的數(shù)據(jù)采集30-334.1.1 數(shù)據(jù)采集前的準(zhǔn)備30-314.1.2 測區(qū)工地準(zhǔn)備314.1.3 測區(qū)數(shù)據(jù)采集31-334.2 EH4系統(tǒng)的數(shù)據(jù)處理33-414.2.1 數(shù)據(jù)的初步處理33-364.2.2 數(shù)據(jù)的室內(nèi)處理36-41第5章 EH4系統(tǒng)相關(guān)技術(shù)研究41-555.1 數(shù)據(jù)文件類型研究41-455.1.1 文件(位置文件)41-425.1.2 X文件(互功率譜文件)425.1.3 Y文件(時間序列文件)42-445.1.4 Z文件(阻抗文件)44-455.2 地形修正的研究45-475.3 消除噪音的研究47-525.3.1 理論研究47-505.3.2 實例分析50-525.4 分辨率和探測深度的研究52-555.4.1 分辨率的研究52-535.4.2 探測深度的研究53-55第6章 EH4系