本文選題：黃土滑坡 + 入滲特性　； 參考：《蘭州大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期

【摘要】：以天水市廖集村滑坡為例,分別在滑坡體后緣、中部和前緣部位進(jìn)行原位雙環(huán)滲水試驗(yàn),獲取滲透系數(shù)和穩(wěn)定滲透深度定量指標(biāo)來(lái)表征滑坡體不同部位的滲透能力,研究滑坡中水的主要入滲途徑.結(jié)果表明:試驗(yàn)區(qū)域的滲透系數(shù)為1.00×10~(-3)~1.00×10~(-4)cm/s,為中等透水,入滲深度在2 m以內(nèi),滑坡體不同部位滲透性能存在較大差異,滑坡體后緣滲透系數(shù)是前緣的約12倍,原因是滑坡體后緣土層具有粗顆粒含量高且不均衡的級(jí)配特點(diǎn)和土層疏松的密實(shí)度特性.由高密度電法結(jié)果配合野外勘察發(fā)現(xiàn),滑坡體中的水來(lái)自降雨直接入滲的貢獻(xiàn)很小,裂隙分布位置與地下水分的賦存狀態(tài)有極大相關(guān)性.雨水由裂隙快速進(jìn)入坡體才是降雨入滲的主導(dǎo)方式.
[Abstract]:Taking Liogicun landslide in Tianshui City as an example, in situ double-ring seepage tests were carried out at the posterior, middle and leading edge of the landslide, respectively, to obtain the quantitative indexes of permeability coefficient and stable penetration depth to characterize the permeability of different parts of the landslide body. The main infiltration ways of water in landslide are studied. The results show that the permeability coefficient of the test area is 1.00 脳 10 ~ (10) ~ (-3) ~ (-1) 脳 10 ~ (10) ~ (-4) cm 路s ~ (-1), which is medium permeable, and the infiltration depth is less than 2 m. The permeability of different parts of the landslide is different, and the permeability coefficient of the posterior edge of the landslide is about 12 times of that of the front. The reason is that the soil layer behind the landslide body has the characteristics of high coarse particle content and uneven gradation and loose compactness of soil layer. According to the results of high density electrical method and field investigation, it is found that the contribution of water in landslide body from rainfall infiltration is very small, and the distribution of cracks is closely related to the occurrence of underground water. Rain Water entered the slope body quickly from crack is the dominant way of rainfall infiltration.
【作者單位】： 蘭州大學(xué)資源環(huán)境學(xué)院甘肅省環(huán)境地質(zhì)與災(zāi)害防治工程研究中心;
【基金】：國(guó)家國(guó)際科技合作專項(xiàng)項(xiàng)目(2013DFE23030) 國(guó)家科技支撐計(jì)劃項(xiàng)目(2011BAK12B06) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(lzujbky-2015-133,lzujbky-2015-bt01)
【分類號(hào)】：P642.22
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本文編號(hào)：1857909