本文選題：音頻大地電磁測(cè)深法 + 高密度電阻率法�。� 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：山體隧道是道路交通建設(shè)的重難點(diǎn),特別是在西部山區(qū),地形結(jié)構(gòu)復(fù)雜、地質(zhì)成因多樣,為隧道設(shè)計(jì)和施工帶來(lái)了嚴(yán)重的影響。由于山體內(nèi)不良地質(zhì)體發(fā)育具有分布無(wú)規(guī)律和形態(tài)多樣等特點(diǎn),單一的鉆探已經(jīng)難以有效了解其形態(tài)和分布,精確有效快速的探測(cè)方法是我們重點(diǎn)研究的內(nèi)容。在隧道初步勘察中,鉆探能對(duì)地質(zhì)信息直接有效的反映出來(lái),但是由于工作成本與地形條件約束,我們往往采用地球物理勘探方法。本文以實(shí)際隧道工程勘察為出發(fā)點(diǎn),通過(guò)大量收集資料及前人的經(jīng)驗(yàn)總結(jié),總結(jié)該區(qū)隧道勘察中常見(jiàn)不良地質(zhì)體(如斷層破碎帶、地表不均勻體等)的電磁響應(yīng)特征,對(duì)工區(qū)隧道勘察中所應(yīng)采用的勘察技術(shù)做了系統(tǒng)的理論研究,分析對(duì)比了相關(guān)勘察方法的優(yōu)缺點(diǎn)及局限性,并據(jù)此建立高低阻模型、地塹地壘模型、地表不均勻體模型、斷層破碎帶模型幾種地電模型,分析研究他們的電磁響應(yīng)特點(diǎn),最后運(yùn)用到實(shí)際隧道工程中,通過(guò)鉆探驗(yàn)證了本文研究?jī)?nèi)容的可行性。首先,對(duì)實(shí)際工區(qū)的隧道勘察技術(shù)進(jìn)行方法理論研究,研究隧道勘察相關(guān)方法的適用性與局限性,并總結(jié)出該地區(qū)相關(guān)的電磁響應(yīng)特征,據(jù)此建立適用于該工區(qū)的高低阻模型、地塹地壘模型、地表不均勻體模型、斷層破碎帶模型四種地電模型的勘察方法。然后,依據(jù)模型對(duì)高密度電阻率法和大地電磁測(cè)深法進(jìn)行了方法原理、裝置及技術(shù)特點(diǎn)的分析總結(jié),并將兩種物探方法有機(jī)結(jié)合,聯(lián)合運(yùn)用到實(shí)際隧道工程勘察中,對(duì)比研究其在隧道勘察中的勘察成果及局限性,得出了大地電磁測(cè)深法對(duì)地下地層起伏分辨率較差、靜態(tài)效應(yīng)干擾巨大的結(jié)論及高密度電阻率法勘探深度淺,高阻屏蔽嚴(yán)重,深部反映粗糙的缺點(diǎn),兩者聯(lián)合解釋能有效解決相關(guān)地質(zhì)問(wèn)題。最后,對(duì)預(yù)測(cè)異常區(qū)域進(jìn)行鉆探驗(yàn)證,對(duì)比鉆探資料,查明了工區(qū)地質(zhì)構(gòu)造特征及地質(zhì)異常情況,也在實(shí)踐中證明大地電磁測(cè)深法與高密度電阻率法聯(lián)合勘探的有效性。本文以實(shí)際隧道工程勘察問(wèn)題為出發(fā)點(diǎn),對(duì)解決隧道地質(zhì)問(wèn)題的勘察技術(shù)進(jìn)行了研究總結(jié),通過(guò)地電模型模擬、實(shí)際工程應(yīng)用、野外鉆探驗(yàn)證,證明了單一物探方法的局限性,同時(shí)使用大地電磁測(cè)深和高密度電阻率法對(duì)隧道進(jìn)行聯(lián)合勘探,取長(zhǎng)補(bǔ)短、相互補(bǔ)充,能有效解決隧道勘察的工程地質(zhì)問(wèn)題,對(duì)今后類(lèi)似工程提供了很好的參考和經(jīng)驗(yàn)。
[Abstract]:Mountain tunnel is one of the most important and difficult points in road traffic construction, especially in the western mountainous area, where the terrain structure is complex and the geological origin is various, which has brought serious influence to the tunnel design and construction. Due to the irregular distribution and diversity of the bad geological bodies in the mountains, it is difficult to understand the morphology and distribution of the poor geological bodies in a single drilling field. The accurate, effective and rapid detection method is the focus of our research. In the preliminary investigation of tunnels, drilling can reflect the geological information directly and effectively, but because of the constraints of work cost and terrain conditions, we often adopt geophysical exploration methods. Based on the actual tunnel engineering investigation, this paper summarizes the electromagnetic response characteristics of the common bad geological bodies (such as fault broken zone, surface uneven body, etc.) in the tunnel survey in this area by collecting a large amount of data and summarizing the previous experience. This paper makes a systematic theoretical study on the investigation technology used in the tunnel investigation in the working area, analyzes and compares the advantages and disadvantages and limitations of the relative survey methods, and establishes the models of high and low resistance, graben and uneven surface mass. Several geoelectric models of fault fracture zone model are used to analyze and study their electromagnetic response characteristics. Finally, they are applied to actual tunnel engineering, and the feasibility of this paper is verified by drilling. First of all, the method and theory of tunnel survey technology in actual working area are studied, and the applicability and limitation of relevant methods in tunnel investigation are studied, and the relevant electromagnetic response characteristics in this area are summarized. Based on this, a model of high and low resistance suitable for this work area is established. Exploration methods of four geoelectric models: graben model, surface heterogeneity model and fault fracture zone model. Then, according to the model, the method principle, equipment and technical characteristics of high density resistivity method and magnetotelluric sounding method are analyzed and summarized, and the two geophysical methods are organically combined and applied to the actual tunnel engineering survey. By contrasting and studying its exploration results and limitations in tunnel exploration, the conclusion that magnetotelluric sounding has poor resolution and great static effect on underground strata is obtained. The high density resistivity method has shallow exploration depth and high resistivity shielding. Deep reflecting the shortcomings of rough, the combined interpretation of the two can effectively solve the related geological problems. Finally, drilling verification is carried out on the predicted abnormal area, and the geological structure characteristics and geological anomalies in the working area are found out by comparing the drilling data, and the effectiveness of the combined exploration of magnetotelluric sounding and high-density resistivity method is also proved in practice. Based on the investigation problem of actual tunnel engineering, this paper studies and summarizes the investigation technology to solve the geological problem of tunnel. The limitation of single geophysical exploration method is proved by geoelectric model simulation, practical engineering application and field drilling verification. At the same time, using magnetotelluric sounding and high-density resistivity method to explore the tunnel, which can make up for each other and complement each other, can effectively solve the engineering geological problems of tunnel survey, and provide a good reference and experience for similar projects in the future.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P631.3

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本文編號(hào)：2091094