本文選題：邊坡工程 + 充氣截排水　； 參考：《巖石力學(xué)與工程學(xué)報》2017年04期

【摘要】：充氣截排水技術(shù)擬在潛在滑坡后緣或長邊坡坡體上進行充氣,在后緣來水路徑上形成非飽和區(qū),截斷后緣匯水或減少后緣水流向坡體內(nèi)的入滲,從而降低坡體內(nèi)的地下水位,提高邊坡的穩(wěn)定性。為了探討充氣氣壓對充氣截排水效果的影響,通過二維數(shù)值模型對不同氣壓下坡體水位變化進行分析,并通過物理模型試驗對數(shù)值模擬結(jié)果進行驗證,得出如下結(jié)論:在坡體中充氣能顯著降低坡體地下水位,截流減滲效果明顯;對于特定坡體,存在與之對應(yīng)的截排水起始充氣壓力和最佳充氣壓力;只有當(dāng)充氣壓力大于截排水起始充氣壓力時,充氣截排水才有效果,坡體前緣水位才會下降;當(dāng)充氣壓力介于起始充氣壓力和最佳充氣壓力之間時,隨著氣壓的增大,坡體前緣水位不斷降低,充氣截排水效果隨氣壓增大而增大;當(dāng)充氣壓力大于最佳充氣壓力時,充氣截排水效果隨氣壓增大而減小。
[Abstract]:The aeration interception and drainage technique is intended to inflate the body of the slope on the back edge of the potential landslide or the slope along the long side of the slope, and form an unsaturated area on the water path of the back edge, which will cut off the catchment of the rear edge or reduce the infiltration of the water from the back edge to the slope, thereby reducing the groundwater level in the slope. Improve the stability of the slope. In order to study the effect of inflatable pressure on the effect of aerated interception and drainage, the variation of water level of slope body under different pressure was analyzed by two-dimensional numerical model, and the results of numerical simulation were verified by physical model test. The conclusions are as follows: aeration in slope can significantly reduce the groundwater level of slope, and the effect of closure and seepage reduction is obvious, for certain slope, there are corresponding initial inflatable pressure and optimal inflatable pressure of intercepting drainage. Only when the inflatable pressure is greater than the initial inflatable pressure of intercepting drainage, can the water level of the leading edge of the slope decrease, and when the inflatable pressure is between the initial inflatable pressure and the optimal inflatable pressure, with the increase of the air pressure, The water level of the front edge of the slope is decreasing and the effect of aeration and drainage is increasing with the increase of air pressure, and when the inflatable pressure is greater than the optimal inflatable pressure, the effect of aeration interception decreases with the increase of air pressure.
【作者單位】： 浙江大學(xué)海洋學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(41372277) “十二五”國家科技支撐計劃項目(2012BAK10B06) 中央高�；究蒲袠I(yè)務(wù)費專項資金資助(2014QNA4028)~~
【分類號】：P642.22
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本文編號：2084026