本文關(guān)鍵詞： 紫坪鋪庫(kù)區(qū) 漩口滑坡 滑坡監(jiān)測(cè) 數(shù)值模擬 穩(wěn)定性分析　出處：《中國(guó)地質(zhì)大學(xué)（北京）》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：紫坪鋪水庫(kù)是國(guó)家重要的水利樞紐工程,自2005年建成蓄水以來(lái),庫(kù)岸邊坡開(kāi)始出現(xiàn)不穩(wěn)定變形跡象,2008汶川地震誘發(fā)了一系列庫(kù)岸邊坡崩塌、滑坡地質(zhì)災(zāi)害。漩口滑坡位于紫坪鋪庫(kù)區(qū)西側(cè)岷江與壽江交匯處,滑坡巖性為三疊系須家河組順層粉質(zhì)砂巖、頁(yè)巖夾煤線,方量約150×104m3。汶川地震漩口滑坡出現(xiàn)變形加速現(xiàn)象,有發(fā)生失穩(wěn)滑動(dòng)的趨勢(shì)。鑒于漩口滑坡有潛在堵江、形成水庫(kù)涌浪及埋覆G213國(guó)道在建白云頂隧道的危險(xiǎn)性,本文對(duì)漩口滑坡所在位置的降雨量和庫(kù)水位以及滑坡地表位移、深部位移、地下水位展開(kāi)監(jiān)測(cè),并借助GeoStudio SEEP/W模塊和SLOPE/W模塊對(duì)該滑坡的滲流特性和穩(wěn)定性進(jìn)一步研究,取得了以下認(rèn)識(shí)和成果： (1)自2012年7月至2014年2月,地表累積變形達(dá)360mm,滑面位于坡面以下18-32m,滑動(dòng)傾角約為180,具有扭轉(zhuǎn)趨勢(shì)。坡面中上部已經(jīng)形成了顯著的拉裂,前緣出現(xiàn)局部失穩(wěn)滑塌,整體穩(wěn)定性較差。 (2)降雨入滲量方面,在考慮植物截留量、葉面蒸發(fā)量以及降雨徑流量的情況下確定了漩口滑坡坡面日降雨入滲量約為8×104m/d。 (3)庫(kù)水位升降過(guò)程中安全系數(shù)存在極值現(xiàn)象,庫(kù)水位上升過(guò)程中出現(xiàn)極大值、下降過(guò)程中出現(xiàn)極小值,極值大小及出現(xiàn)時(shí)刻與庫(kù)水位高度及上升或下降速度有關(guān)。庫(kù)水位下降速度越快安全系數(shù)越小,庫(kù)水位下降過(guò)程中滲流速度在前緣有垂直坡體向外的分量,不利于坡體穩(wěn)定。 (4)構(gòu)造節(jié)理裂隙、裂縫等的發(fā)育為降雨入滲提供了良好通道,是影響漩口滑坡失穩(wěn)的主要原因之一。 (5)庫(kù)水位下降與暴雨的結(jié)合是漩口滑坡發(fā)生滑動(dòng)的最不利工況。應(yīng)該合理安排水庫(kù)的蓄排水,避免過(guò)快的放水(尤其是在雨季)。
[Abstract]:Zipingpu Reservoir is an important water conservancy project in China. Since its completion in 2005, the bank slope of the reservoir began to show signs of unstable deformation. The 2008 Wenchuan earthquake induced a series of bank slopes to collapse. The landslide is located at the junction of Minjiang River and Shoujiang River on the west side of Zipingpu Reservoir area. The landslide lithology is the bedding silty sandstone of the Xujiahe formation of Triassic, the shale intercalated coal line, the volume of which is about 150 脳 104m3.The Waikou landslide of Wenchuan earthquake appears the phenomenon of acceleration of deformation. There is a tendency of instability and sliding. In view of the potential river plugging in the Waikou landslide and the danger of reservoir surge and the construction of Baiyun top tunnel under construction of the G213 National Road, the rainfall, reservoir water level and landslide surface displacement in the location of the Waikou landslide are discussed in this paper. The deep displacement and groundwater level are monitored, and the seepage characteristics and stability of the landslide are further studied with the help of GeoStudio SEEP/W module and SLOPE/W module. The following results have been obtained:. From July 2012 to February 2014, the accumulated deformation of the surface reached 360 mm, the slip surface was located below the slope surface 18-32 m, the slip inclination was about 180, and the slope had a torsional trend. The upper and middle part of the slope had formed a significant tension crack, and the local unstable slide appeared in the front edge. The overall stability is poor. (2) in the aspect of rainfall infiltration, the daily rainfall infiltration on the slope of Wingkou landslide is about 8 脳 10 ~ 4 m / d considering plant interception, leaf evaporation and rainfall runoff. (3) in the process of water level rise and fall, the safety factor has extreme value phenomenon, the maximum value appears in the process of water level rising, and the minimum value appears in the process of falling. The maximum value and appearance time are related to the height of reservoir water level and the speed of rising or falling. The faster the water level drops, the smaller the safety coefficient is, and the percolation velocity has the component of vertical slope body in the process of reservoir water level falling, which is not conducive to the stability of slope body. 4) the development of structural joints, fractures and so on provides a good channel for rainfall infiltration, which is one of the main reasons that affect the instability of the Whirlangkou landslide. (5) the combination of falling reservoir water level and heavy rain is the most unfavorable condition for landslide sliding in Waikou. The reservoir drainage should be reasonably arranged to avoid excessive discharge (especially in the rainy season).
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)（北京）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P642.22;TV221.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 史彥新;張青;孟憲瑋;;分布式光纖傳感技術(shù)在滑坡監(jiān)測(cè)中的應(yīng)用[J];吉林大學(xué)學(xué)報(bào)(地球科學(xué)版);2008年05期

2 范青松;湯翠蓮;陳于;張曉東;;GPS與InSAR技術(shù)在滑坡監(jiān)測(cè)中的應(yīng)用研究[J];測(cè)繪科學(xué);2006年05期

3 張保軍;李振作;程俊祥;鄧邦龍;;茅坪與新灘滑坡體變形機(jī)理類比研究[J];長(zhǎng)江科學(xué)院院報(bào);2008年01期

4 羅紅明;唐輝明;章廣成;徐衛(wèi)亞;;庫(kù)水位漲落對(duì)庫(kù)岸滑坡穩(wěn)定性的影響[J];地球科學(xué)(中國(guó)地質(zhì)大學(xué)學(xué)報(bào));2008年05期

5 王士天,劉漢超,張倬元,黃潤(rùn)秋,許模尚,岳全,王思敬,杜永廉,馬風(fēng)山,丁恩保;大型水域水巖相互作用及其環(huán)境效應(yīng)研究[J];地質(zhì)災(zāi)害與環(huán)境保護(hù);1997年01期

6 王念秦;王永鋒;羅東海;姚勇;;中國(guó)滑坡預(yù)測(cè)預(yù)報(bào)研究綜述[J];地質(zhì)論評(píng);2008年03期

7 石菊松;吳樹(shù)仁;石玲;;遙感在滑坡災(zāi)害研究中的應(yīng)用進(jìn)展[J];地質(zhì)論評(píng);2008年04期

8 唐亞明;張茂省;薛強(qiáng);畢俊擘;;滑坡監(jiān)測(cè)預(yù)警國(guó)內(nèi)外研究現(xiàn)狀及評(píng)述[J];地質(zhì)論評(píng);2012年03期

9 周平根;滑坡監(jiān)測(cè)的指標(biāo)體系與技術(shù)方法[J];地質(zhì)力學(xué)學(xué)報(bào);2004年01期

10 方玉樹(shù);;滑坡穩(wěn)定分析傳遞系數(shù)法若干問(wèn)題探討[J];工程地質(zhì)學(xué)報(bào);2007年05期

，

本文編號(hào)：1515958