【摘要】：通過裂隙輻射流滲流試驗裝置對人工裂隙進行不同法向荷載下滲流試驗,分析法向應力和滲流壓力對滲流量的影響機理。各級法向荷載下裂隙面沖刷痕跡大體接近,被沖刷的區(qū)域集中在試件中心進水口處,進水口附近水流產(chǎn)生較大紊動。不同法向應力下滲流量與入滲水頭近似呈線性關系,說明了試驗過程中裂隙水的運動特性符合達西定律;相同入滲水壓下的滲流量大致相同,上下試件之間的接觸狀態(tài)不隨法向應力的加大發(fā)生變化,而是維持一個穩(wěn)定的裂隙開度。入滲水壓從0.1 MPa到0.2 MPa之間水頭損失增加較快,0.2 MPa后增速變慢且趨近直線;水頭損失百分比曲線呈現(xiàn)先增大后減小的規(guī)律,擬合曲線為三次多項式。
[Abstract]:The percolation test of artificial cracks under different normal loads is carried out by the fissured radiant flow seepage test device. The influence mechanism of the normal stress and seepage pressure on the seepage flow is analyzed. The scouring traces of the gap surface at all levels are roughly close, the area of the scour is concentrated at the inlet of the center of the specimen, and the flow of water near the inlet produces a greater turbulence. There is a linear relationship between the seepage flow under different normal stress and the infiltration head, which shows that the motion characteristics of the fractured water conform to Darcy's law in the test process, and the seepage flow under the same infiltration water pressure is approximately the same. The contact state between the upper and lower specimens does not change with the increase of the normal stress, but maintains a stable fracture opening. The water head loss between the infiltration water pressure from 0.1 MPa to 0.2 MPa increases rapidly, and the growth rate becomes slow and straight after 0.2 MPa, and the percentage curve of the head loss increases first and then decreases, and the fitting curve is three times polynomial.
【作者單位】： 西安理工大學西北旱區(qū)生態(tài)水利工程國家重點實驗室培育基地;
【基金】：陜西省重點科技創(chuàng)新團隊項目(2013KCT-015)
【分類號】：TU452

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