本文選題：三維土工網(wǎng)墊 + 坡面流　； 參考：《水土保持研究》2017年01期

【摘要】：為了揭示三維土工網(wǎng)防護(hù)坡面侵蝕規(guī)律,利用室內(nèi)模擬放水沖刷試驗(yàn),定量研究了不同坡度(5°,10°,15°,20°,25°,30°)、不同流量(1 m~3/h,1.5 m3/h,2 m~3/h)條件下,三維土工網(wǎng)防護(hù)坡面的侵蝕過程及侵蝕特征。結(jié)果表明:(1)累積侵蝕量隨坡度和流量的增大而增大,且沖刷最初10min內(nèi)得到的侵蝕量占侵蝕總量的70%左右,而沖刷末期的坡面流含沙率僅在0.01~0.04g/cm~3內(nèi)波動;(2)隨著坡度增大,累積侵蝕量的貢獻(xiàn)率增大,流量對累積侵蝕量起主導(dǎo)作用,在大流量沖刷的條件下,流量對累積侵蝕量的貢獻(xiàn)率比流量較小時更加顯著;(3)累積侵蝕量與坡度呈正相關(guān)的冪函數(shù)關(guān)系,相關(guān)性顯著;(4)三維土工網(wǎng)防護(hù)邊坡的坡面流為紊流,累積侵蝕量與雷諾系數(shù)的關(guān)系可以表示為:M=0.186Re0.672,相關(guān)系數(shù)R~2=0.9429。
[Abstract]:In order to reveal the erosion law of three dimensional earth network protection slope, the erosion process and erosion characteristics of three dimensional earth network protection slope under different slope (5 擄~ 10 擄~ 15 擄~ 15 擄~ 20 擄~ 20 擄~ 25 擄~ 30 擄~ 30 擄) and different flow rate (1 m ~ 3 / h ~ 1.5 m ~ (3 / h) ~ 2 m ~ (3 / h) were quantitatively studied by using indoor simulated flushing test. The results show that: (1) the cumulative erosion amount increases with the increase of slope and flow rate, and the erosion amount in the initial 10min accounts for about 70% of the total erosion amount, while the sediment content in the slope flow at the end of scour only fluctuates in the 0.01~0.04g/cm~3, (2) with the increase of the slope, The contribution rate of cumulative erosion amount increases, and the flow rate plays a leading role in the cumulative erosion amount. The contribution rate of the flow rate to the cumulative erosion amount is more significant than that of the small flow rate; (3) there is a positive correlation between the cumulative erosion amount and the slope gradient, and the correlation is significant; (4) the slope flow of the slope protected by the three-dimensional geotechnical network is turbulent. The relationship between the cumulative erosion amount and the Reynolds coefficient can be expressed as: 1 / M0. 186 Re0. 672, and the correlation coefficient Ru 2 0. 9429.
【作者單位】： 山東大學(xué)土建與水利學(xué)院;
【基金】：國家自然科學(xué)基金“三維土工網(wǎng)防護(hù)邊坡坡面流特性及侵蝕動力機(jī)制研究”(11372165)
【分類號】：S157

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本文編號：2054450