【摘要】：鑒于節(jié)理粗糙度、力學(xué)隙寬及跡線是影響確定粗糙單裂隙等效水力隙寬的三個關(guān)鍵因素,在既有研究的基礎(chǔ)上,將光滑平行板和Barton提出的10條標準節(jié)理粗糙度系數(shù)曲線數(shù)字化,應(yīng)用Fluent軟件對不同節(jié)理粗糙度系數(shù)和不同力學(xué)隙寬模型進行數(shù)值模擬,探討了節(jié)理粗糙度系數(shù)、力學(xué)隙寬、跡線與等效水力隙寬之間的關(guān)系。并與立方定理修正公式進行對比,結(jié)果表明等效水力隙寬隨力學(xué)隙寬增大而線性增大,隨節(jié)理粗糙度系數(shù)的增大而減小,并且考慮實際跡線情況的等效水力隙寬較不考慮的大。因此,在實際工程中,可采用所提出的擬合公式判斷自然粗糙裂隙的滲透能力。
[Abstract]:In view of the joint roughness, mechanical gap width and trace line are the three key factors affecting the determination of equivalent hydraulic gap width of a rough single crack. On the basis of existing research, the 10 standard joint roughness coefficient curves proposed by smooth parallel plate and Barton are digitized. The relationship between joint roughness coefficient, mechanical gap width, trace line and equivalent hydraulic gap width is discussed by numerical simulation of different joint roughness coefficients and different mechanical gap width models with Fluent software. The results show that the equivalent hydraulic gap width increases linearly with the increase of the mechanical gap width and decreases with the increase of the joint roughness coefficient, and the equivalent hydraulic gap width considering the actual trace is larger than that without consideration of the actual trace. The results show that the equivalent hydraulic gap width increases linearly with the increase of the mechanical gap width and decreases with the increase of the joint roughness coefficient. Therefore, in practical engineering, the proposed fitting formula can be used to judge the permeability of natural rough cracks.
【作者單位】： 河海大學(xué)巖土力學(xué)與堤壩工程教育部國家重點實驗室;河海大學(xué)土木與交通學(xué)院隧道與城市軌道工程研究所;
【分類號】：TV139.1;TU45

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