本文選題：工程地質(zhì) + 聲波CT　； 參考：《巖石力學(xué)與工程學(xué)報(bào)》2017年S1期

【摘要】：花崗巖球狀風(fēng)化體(孤石)是花崗巖風(fēng)化程度不均產(chǎn)生的殘留,直接影響到地鐵盾構(gòu)施工的安全性,高效、準(zhǔn)確地探明孤石分布是地鐵工程勘察面臨的難題。利用自主研制的電火花震源等探測系統(tǒng)和地質(zhì)專家分析法,在探測區(qū)域周邊的鉆孔中進(jìn)行震源的發(fā)射和聲波的接收,根據(jù)縱波在孤石和周邊地質(zhì)中具有不同的傳播速度等原理,通過對(duì)聲波初至旅行時(shí)的記錄和解譯,反演成為探測區(qū)域的三維聲波速度場,直觀地表達(dá)了探測區(qū)域的內(nèi)部地質(zhì)構(gòu)造。以某市地鐵隧道孤石調(diào)查為實(shí)例,驗(yàn)證了該方法的有效性和可靠性。結(jié)果顯示,跨孔聲波CT技術(shù)能有效地揭示孤石的空間分布,成果圖像形象直觀,可較好地解決該類地質(zhì)勘察難題,能夠?yàn)楹罄m(xù)施工提供科學(xué)依據(jù)。
[Abstract]:Granitic globular weathering body (solitary stone) is the residual of granite weathering degree, which directly affects the safety of shield construction of subway. It is a difficult problem for subway engineering investigation to find out the distribution of solitary stone efficiently and accurately. Using the independently developed electric spark source detection system and geological expert analysis method, the source emission and acoustic wave reception are carried out in the boreholes around the exploration area. According to the principle that the longitudinal wave has different propagation velocity in the isolated rock and the surrounding geology, By recording and interpreting the first arrival of the acoustic wave, the inversion becomes the three-dimensional acoustic velocity field of the exploration area, and the internal geological structure of the exploration area is expressed intuitively. The effectiveness and reliability of the method are verified by a case study of isolated stone in a subway tunnel in a certain city. The results show that the cross-hole CT technique can effectively reveal the spatial distribution of the solitary stone, visualize the image of the results, solve the difficult problem of geological survey, and provide scientific basis for the subsequent construction.
【作者單位】： 中國科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國家重點(diǎn)實(shí)驗(yàn)室;中鐵西南科學(xué)研究院;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973)項(xiàng)目(2015CB057905) 中國科學(xué)院重點(diǎn)部署項(xiàng)目 百人計(jì)劃項(xiàng)目(KZZD EW TZ 12) 國家自然科學(xué)基金資助項(xiàng)目(51409263)~~
【分類號(hào)】：P631.4;U231.1;U455.43

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