本文選題：非飽和黃土 + 滑坡��； 參考：《水文地質(zhì)工程地質(zhì)》2017年04期

【摘要】：2010年10月21—22日,陜西延煉廠區(qū)儲(chǔ)油罐下方的斜坡發(fā)生緩慢滑移,造成了巨大的經(jīng)濟(jì)損失�；掳l(fā)生前當(dāng)?shù)貨](méi)有降雨或地震,為探究其形成過(guò)程,在邊坡上取代表性土樣進(jìn)行土水特征曲線測(cè)試、配制不同含水率土樣,進(jìn)行常規(guī)三軸試驗(yàn)和直剪試驗(yàn),以確定土體的非飽和滲透曲線和強(qiáng)度參數(shù)。建立邊坡滑動(dòng)前的有限元模型,進(jìn)行非飽和滲透與非飽和強(qiáng)度的耦合分析,得到凝結(jié)水入滲過(guò)程中邊坡的應(yīng)力場(chǎng),據(jù)此可得不同時(shí)間段的邊坡穩(wěn)定系數(shù),揭示其破壞過(guò)程。結(jié)果表明,水蒸氣凝結(jié)水在斜坡內(nèi)長(zhǎng)期滴滲,使得坡體地下水位緩慢上升,地下水位浸潤(rùn)潛在滑面前,穩(wěn)定系數(shù)基本不變,待地下水位開(kāi)始浸潤(rùn)邊坡潛在滑面時(shí),穩(wěn)定系數(shù)開(kāi)始迅速降低,最終導(dǎo)致斜坡破壞。
[Abstract]:On October 21-22, 2010, the slope beneath the oil storage tank in Shaanxi Yancheng Refinery area slid slowly, causing huge economic losses. There was no rainfall or earthquake before the landslide occurred. In order to investigate its formation process, the representative soil samples were taken on the slope to test the soil water characteristic curve, the soil samples with different moisture content were prepared, and the routine triaxial test and direct shear test were carried out. In order to determine the unsaturated permeability curve and strength parameters. The finite element model of slope before sliding is established, and the coupling analysis of unsaturated permeability and unsaturated strength is carried out, and the stress field of the slope in the process of condensate infiltration is obtained. According to this model, the slope stability coefficient in different time periods can be obtained and the failure process can be revealed. The results show that the seepage of water vapor condensate in the slope for a long time makes the groundwater level rise slowly, and the coefficient of stability is basically unchanged when the groundwater level begins to infiltrate the potential slip surface of the slope, and when the groundwater level begins to infiltrate the potential slip surface of the slope, The coefficient of stability began to decrease rapidly and eventually resulted in slope failure.
【作者單位】： 長(zhǎng)安大學(xué)地質(zhì)工程與測(cè)繪學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41372329,41502286) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃資助(973計(jì)劃)(2014CB744701)
【分類號(hào)】：P642.22

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