本文選題：斷層　切入點：場地穩(wěn)定性　出處：《成都理工大學(xué)》2015年碩士論文

【摘要】：為查清某擬建機場區(qū)地下巖石磁性是否穩(wěn)定以及地下地質(zhì)構(gòu)造情況,對該待建區(qū)域開展高精度磁測、激電法等勘查研究工作,利用所獲資料的磁異常及激電剖面及斷面特征,綜合地質(zhì)特點,對該擬建機場場地穩(wěn)定性進(jìn)行了研究。首先對本研究區(qū)地質(zhì)資料進(jìn)行了收集和整理,得到本區(qū)域基本地質(zhì)特征。再采用高精度地面磁測方法對研究區(qū)域進(jìn)行掃面工作,對采集數(shù)據(jù)分析處理,得到磁異常變化特征,并初步確定了磁場變化較大的區(qū)域:全區(qū)僅西北角出現(xiàn)呈連續(xù)性較長、多條等值線平行的、呈不規(guī)則弧形的磁場梯級帶,該磁場梯級帶地磁場強度總體呈現(xiàn)由東南向西北逐漸增大的趨勢。西南角區(qū)域與周圍區(qū)域有明顯異常差異,初步推斷,此處可能有斷層存在。然后,使用激電探測來驗證該推斷斷層是否存在,并確定其邊界的確切位置。沿垂直磁場梯級帶走向布置了三條測線,使用聯(lián)合剖面法與電阻率測深方法相結(jié)合,以確定推斷斷層的具體位置及其傾斜方向,并對其斷面形態(tài)有所了解。測定結(jié)果正交點與低阻異常區(qū)域?qū)Ρ刃Ч黠@,據(jù)聯(lián)合剖面曲線判斷的傾向與視電阻率擬斷面顯示結(jié)果一致。磁、電異常及其解釋推斷結(jié)果表明,擬建機場跑道區(qū)場地基礎(chǔ)穩(wěn)定,研究區(qū)弧形磁場梯級帶下方存在斷層的可能性較大,有待進(jìn)一步的工程驗證。綜合磁電探測方法,對車站、機場、高層建筑等場地進(jìn)行穩(wěn)定性評價研究,是一種行之有效的方法,可以用來解決類似問題,為生產(chǎn)生活和工程建設(shè)服務(wù);每種物探方法都有一定的局限性,對于單一方法無法解釋的異常,可綜合幾種不同的勘探方法,以發(fā)揮各種勘探方法的優(yōu)勢,彌補單一方法的不足,根據(jù)不同的地質(zhì)情況和具體工作環(huán)境,將兩種或多種不同的物探方法與地質(zhì)綜合使用,從而達(dá)到解決實際問題的目的。
[Abstract]:In order to find out whether the magnetic properties of underground rock and the underground geological structure are stable or not in a proposed airport area, the high precision magnetic survey and IP method are carried out in the area to be built, and the magnetic anomalies and the profile and section characteristics of the obtained data are used.The stability of the proposed airport site is studied in this paper.Firstly, the geological data of the study area are collected and sorted, and the basic geological characteristics of the region are obtained.Then using the method of high-precision ground magnetic measurement to sweep the study area, analyzing and processing the collected data, obtaining the characteristics of magnetic anomaly change, and preliminarily determining the region with large magnetic field change: the whole area only appears in the northwest corner with a longer continuity.The geomagnetic field intensity of the magnetic field cascade belt is increasing gradually from southeast to northwest.There are obvious differences between the southwest corner region and the surrounding area, and it is preliminarily concluded that there may be faults here.Then IP detection is used to verify the existence of the inferred fault and to determine the exact location of its boundary.Three measuring lines are arranged along the strike of the vertical magnetic field cascade zone. The combined section method and the resistivity sounding method are used to determine the specific location and inclined direction of the fault and to understand the shape of the fault section.The results show that the orthogonal points are more effective than the low-resistivity abnormal areas, and the tendency to judge according to the joint profile curve is consistent with the apparent resistivity pseudo section display results.The results of magnetic and electrical anomalies and their interpretation and inference indicate that the ground foundation of the proposed airport runway area is stable and the possibility of faults under the arc magnetic field cascade zone in the study area is high which needs further engineering verification.It is an effective method to evaluate the stability of stations, airports, high-rise buildings and so on. It can be used to solve similar problems and serve for production and life and engineering construction.Each geophysical exploration method has some limitations. For anomalies that can not be explained by a single method, several different exploration methods can be synthesized in order to give full play to the advantages of various exploration methods and to make up for the shortcomings of a single method.According to different geological conditions and specific working environment, two or more different geophysical exploration methods and geology are used comprehensively to solve practical problems.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.3;P631.2

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本文編號：1725167