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  本文選題：隧洞　切入點(diǎn)：巖爆　出處：《西南交通大學(xué)》2014年碩士論文

【摘要】：本文以引漢濟(jì)渭秦嶺隧洞為工程背景,參考已有的研究成果,在查明研究區(qū)域的工程地質(zhì)條件、現(xiàn)場地應(yīng)力測試、室內(nèi)巖石物理力學(xué)試驗(yàn)、三維初始地應(yīng)力場反演和開挖后二次應(yīng)力場模擬的基礎(chǔ)上,對地應(yīng)力與巖爆的規(guī)律做了較為系統(tǒng)的分析和研究。主要獲得以下的研究成果： (1)通過現(xiàn)場地應(yīng)力測試,查明了秦嶺隧洞工程區(qū)的空間應(yīng)力情況,對整個隧洞工程的地應(yīng)力空間分布規(guī)律有了系統(tǒng)的認(rèn)識。秦嶺隧址區(qū)的應(yīng)力場以NW向擠壓為主。最大主應(yīng)力方向?yàn)镹30°W~N46°W。 (2)通過巖石室內(nèi)試驗(yàn)(巖石物理力學(xué)試驗(yàn)、巖石常規(guī)三軸試驗(yàn)、巖石剛性三軸試驗(yàn))研究,表明引漢濟(jì)渭秦嶺隧洞的硬質(zhì)巖在巖性和強(qiáng)度上具備發(fā)生巖爆的條件。 (3)對已開挖的隧洞區(qū)進(jìn)行三維初始地應(yīng)力反演,結(jié)果表明,初始地應(yīng)力場中,最大主應(yīng)力、中間主應(yīng)力和最小主應(yīng)力均隨埋深的增加而增大。反演分析表明,最大主應(yīng)力大部分介于10-45MPa,中間主應(yīng)力大部分介于10-25MPa,最小主應(yīng)力大部分介于0～15MPa。 (4)在對引漢濟(jì)渭秦嶺隧洞已開挖段發(fā)生的巖爆進(jìn)行研究和分析的基礎(chǔ)上,借鑒前人的已有研究成果,總結(jié)出從應(yīng)力條件(初始地應(yīng)力、二次擾動應(yīng)力)和巖性條件(巖體單軸抗壓強(qiáng)度、巖體完整性系數(shù)、抗壓強(qiáng)度與抗拉強(qiáng)度之比)為主的巖爆判斷依據(jù)。
[Abstract]:In this paper, based on the engineering background of the Qinling tunnel, the engineering geological conditions, in-situ stress test, and indoor rock physical and mechanical tests in the study area have been found out with reference to the existing research results. Based on the inversion of 3D initial stress field and the simulation of secondary stress field after excavation, the regularity of in-situ stress and rockburst is systematically analyzed and studied. 1) the spatial stress in the Qinling tunnel project area has been found out by in-situ stress test. The spatial distribution of geostress in the whole tunnel project is systematically understood. The stress field in Qinling tunnel area is dominated by NW compression, and the maximum principal stress direction is N30 擄W~N46 擄W. 2) through the laboratory test of rock (rock physical mechanics test, rock routine triaxial test, rock rigid triaxial test), it is shown that the hard rock introduced from Hanji-Weiqinling tunnel has the condition of rock burst in lithology and strength. The results show that the maximum principal stress, the intermediate principal stress and the minimum principal stress increase with the increase of the buried depth in the initial geostress field, and the inversion analysis shows that the maximum principal stress, the intermediate principal stress and the minimum principal stress increase with the increase of the buried depth. The maximum principal stress is between 10-45 MPA, the intermediate principal stress is mostly 10-25 MPA, and the minimum principal stress is mostly 0.15 MPA. 4) based on the research and analysis of rock burst in the excavated section of Qinling tunnel in Ji-Wei, the author summarizes the stress condition (initial in-situ stress) by referring to the previous research results. Second disturbance stress) and lithologic conditions (uniaxial compressive strength of rock mass, integrity coefficient of rock mass, ratio of compressive strength to tensile strength) are the main criteria for judging rock burst.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU45;TV554

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本文編號：1665460