本文關(guān)鍵詞： 黃土滑坡 漸進(jìn)后退式 軟基效應(yīng) 地下水局部雍高　出處：《工程地質(zhì)學(xué)報(bào)》2017年01期 　論文類(lèi)型：期刊論文

【摘要】：黑方臺(tái)位于我國(guó)甘肅省永靖縣,該區(qū)由于長(zhǎng)期灌溉導(dǎo)致地下水位上升,誘發(fā)了大量的黃土滑坡,其中最典型的一類(lèi)滑坡為漸進(jìn)后退式黃土滑坡。通過(guò)對(duì)比代表性滑坡多期Google影像,并結(jié)合現(xiàn)場(chǎng)調(diào)查分析了近年來(lái)新發(fā)生的滑坡,發(fā)現(xiàn)該類(lèi)黃土滑坡具有典型的漸進(jìn)后退式演化過(guò)程�，F(xiàn)場(chǎng)調(diào)查和對(duì)典型滑坡剖面黃土含水率的實(shí)測(cè)發(fā)現(xiàn),黃土層底部受地下水的長(zhǎng)期浸泡軟化所形成的軟基效應(yīng)是使黃土滑坡不斷發(fā)生的主要原因,而滑坡發(fā)生后留下的弧形凹槽往往成為地下水局部集中匯聚和排泄點(diǎn),滑源區(qū)被滑坡殘留體覆蓋導(dǎo)致地下水位局部雍高上漲,將導(dǎo)致同一滑坡發(fā)生多次漸進(jìn)后退式破壞。
[Abstract]:Heifangtai is located in Yongjing County, Gansu Province, where a large number of loess landslides have been induced due to the rise of groundwater level caused by long-term irrigation. The most typical type of landslide is the progressive backward loess landslide. By comparing the multi-stage Google images of representative landslides and combining with the field investigation, this paper analyzes the newly occurring landslides in recent years. It is found that this kind of loess landslide has a typical evolution process of gradual retrogression. The soft foundation effect caused by the soaking and softening of the bottom of the loess soil is the main reason for the continuous occurrence of the loess landslide, and the arc groove left behind after the landslide often becomes the local concentration and discharge point of the groundwater. The local uvula of groundwater level in the sliding source area is covered by the residual body of the landslide, which will lead to multiple progressive retrogressive damage of the same landslide.
【作者單位】： 地質(zhì)災(zāi)害防治與地質(zhì)環(huán)境保護(hù)國(guó)家重點(diǎn)實(shí)驗(yàn)室(成都理工大學(xué));
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41630640) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2014CB744703) 國(guó)家杰出青年科學(xué)基金(41225011)資助
【分類(lèi)號(hào)】：P642.22

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