發(fā)布時間：2018-04-01 17:33

  本文選題：巖石節(jié)理　切入點：閉合變形　出處：《巖土工程學(xué)報》2017年10期

【摘要】：地下巖體工程建設(shè)和運營過程中,需要考慮節(jié)理巖體的水力學(xué)性質(zhì),這與節(jié)理的閉合變形密切相關(guān)。對法向應(yīng)力作用下節(jié)理微凸體的變形特征進(jìn)行詳細(xì)分析,逐個計算接觸微凸體的法向變形和接觸應(yīng)力;采用接觸理論計算微凸體基圓半徑之外的基體變形,并以此調(diào)整微凸體的法向位置,進(jìn)而提出新的閉合變形理論模型。新模型可反映節(jié)理的基體變形和微凸體變形相互作用的影響,也能體現(xiàn)形貌分量和接觸類型對閉合變形的影響。與已有的理論模型比較,新模型的計算值更為接近試驗值。采用疊加原理,新模型計算得到的初始法向剛度最小;但隨法向應(yīng)力的增加,法向剛度增加速率逐步加快。
[Abstract]:In the process of construction and operation of underground rock mass, the hydraulic properties of jointed rock mass should be considered, which is closely related to the closed deformation of joint.The deformation characteristics of joint and microconvex under normal stress are analyzed in detail. The normal deformation and contact stress of contact microconvex are calculated one by one, and the matrix deformation beyond the radius of base circle of microconvex is calculated by contact theory.The normal position of the microconvex body is adjusted and a new closed deformation theory model is proposed.The new model can reflect the influence of matrix deformation and micro-convex deformation interaction of joints, and the effect of morphology and contact type on closed deformation.Compared with the existing theoretical model, the calculated value of the new model is closer to the experimental value.By using the superposition principle, the initial normal stiffness obtained by the new model is the smallest, but with the increase of normal stress, the increasing rate of normal stiffness increases gradually.
【作者單位】： 中國地質(zhì)大學(xué)(武漢)工程學(xué)院;成都理工大學(xué)地質(zhì)災(zāi)害防治與地質(zhì)環(huán)境保護(hù)國家重點實驗室;中國科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國家重點實驗室;
【基金】：國家自然科學(xué)基金面上項目(41672302,11672360,41402247) 地質(zhì)災(zāi)害防治與地質(zhì)環(huán)境保護(hù)國家重點實驗室開放基金項目(SKLGP2014K018)
【分類號】：TU45
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本文編號：1696611