本文選題：河水位上升 + 河水位下降��； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：三峽庫(kù)區(qū)蓄水后,支流東河受庫(kù)區(qū)高水位影響,導(dǎo)致庫(kù)岸產(chǎn)生新的地質(zhì)災(zāi)害,影響臨近居民居住及財(cái)產(chǎn)安全。光芒滑坡位于東河右岸,研究東河水位升降對(duì)光芒滑坡穩(wěn)定性的影響問題具有重要的意義。本文調(diào)查了光芒滑坡區(qū)的工程地質(zhì)及水文地質(zhì)條件,分析了滑坡形成過程及機(jī)制,采用定性分析與定量計(jì)算相結(jié)合的方法,得出了河水位上升及下降情況下不同工況不同時(shí)刻光芒滑坡地下水位特征,考慮河水位上升及下降、不同工況、不同時(shí)刻,對(duì)光芒滑坡的穩(wěn)定性進(jìn)行了計(jì)算,并對(duì)光芒滑坡穩(wěn)定性的變化規(guī)律進(jìn)行了總結(jié)及分析,取得的主要研究成果如下:1.光芒滑坡屬于小型土質(zhì)牽引式滑坡,滑坡總體坡度較陡,滑體物質(zhì)組分為第四系的粉質(zhì)粘土夾碎塊石,整體結(jié)構(gòu)松散~稍密,穩(wěn)定性較差,下伏侏羅系中統(tǒng)沙溪廟組泥巖。滑坡區(qū)地下水主要由降雨和上升的東河水補(bǔ)給,東河水位升降對(duì)滑坡穩(wěn)定性的影響較大。分析了光芒滑坡區(qū)的工程地質(zhì)條件,該滑坡區(qū)不利的地形地貌和巖土特性是形成滑坡的內(nèi)在因素,而東河水位的升降造成滑坡區(qū)地下水流場(chǎng)的變化是誘發(fā)滑坡的重要因素。2.東河水位上升與下降對(duì)光芒滑坡區(qū)地下水流場(chǎng)有較大影響。當(dāng)河水位上升時(shí),光芒滑坡區(qū)地下水流場(chǎng)的變化特征為:坡體內(nèi)水位隨河水位的上升而上升;受巖土體本身性質(zhì)的影響,單一浸潤(rùn)線呈一定斜率的曲線,且接近臨空面斜率較大,不同時(shí)刻浸潤(rùn)線隨著水位的上升其傾斜程度變化較小,宏觀上表現(xiàn)為河水位與坡體內(nèi)部水位的差值變化較小。當(dāng)河水位下降時(shí),光芒滑坡區(qū)地下水流場(chǎng)的變化特征為:滑坡體內(nèi)水位隨河水位的下降而下降;受巖土體本身性質(zhì)的影響,單一浸潤(rùn)線是呈一定斜率的曲線,且接近臨空面斜率較大,不同時(shí)刻浸潤(rùn)線隨著水位的下降其傾斜程度變化較小,宏觀上表現(xiàn)為臨空面處河水位與坡體內(nèi)部水位的差值變化較小。3.東河水位上升對(duì)光芒滑坡穩(wěn)定性的影響如下:東河水位上升條件下,滑坡體內(nèi)水位上升滯后于河水位的上升,滑坡的穩(wěn)定性先降低后增強(qiáng),且穩(wěn)定性的變化較小,當(dāng)河水位由165m上升至169m時(shí),穩(wěn)定性系數(shù)達(dá)到最小值,滑坡穩(wěn)定性最差,隨著水位的繼續(xù)升高,滑坡穩(wěn)定性系數(shù)逐漸增大。河水位上升總體對(duì)滑坡穩(wěn)定性的影響較小,水位上升速度越快,滑坡穩(wěn)定性略有降低4.東河水位下降對(duì)光芒滑坡穩(wěn)定性的影響如下:東河水位下降條件下,坡體內(nèi)水位的下降滯后于河水位的下降,滑坡的穩(wěn)定性逐步降低,且穩(wěn)定性的變化較大,河水位由175m下降至171m處,滑坡穩(wěn)定性下降較快,171m后滑坡穩(wěn)定性下降速度相對(duì)較緩,總體上河水位下降對(duì)滑坡穩(wěn)定性的影響較大。
[Abstract]:After the storage of water in the three Gorges Reservoir, the Donghe River, a tributary, is affected by the high water level in the reservoir area, resulting in a new geological hazard on the bank of the reservoir, which affects the residents living nearby and the safety of property. The Guangliang landslide is located on the right bank of the Donghe River. It is of great significance to study the influence of the rise and fall of the Donghe water level on the stability of the Guangliang landslide. This paper investigates the engineering geology and hydrogeological conditions of Guangguang landslide area, analyzes the forming process and mechanism of the landslide, and adopts the method of combining qualitative analysis with quantitative calculation. The characteristics of underground water level of light landslide at different working conditions and different times are obtained under the condition of rising and falling of river water level. The stability of light landslide is calculated at different working conditions and different times considering the rise and fall of river water level. The variation law of the stability of Guangliang landslide is summarized and analyzed. The main research results are as follows: 1. Guang landslide belongs to the small soil traction type landslide with steep overall slope. The material composition of the landslide body is divided into silty clay and clastic rock of Quaternary system, the whole structure is loose ~ slightly dense, the stability is poor, and the mudstone of Shaximiao formation in the Lower Jurassic Middle Series. Groundwater in landslide area is mainly recharged by rainfall and rising Donghe river, and the fluctuation of Donghe water level has a great influence on landslide stability. The engineering geological conditions of Guangguang landslide area are analyzed. The unfavorable landform and geomorphology and geotechnical characteristics of the landslide area are the internal factors to form the landslide, and the change of groundwater flow field in the landslide area caused by the rise and fall of the Donghe water level is the important factor that induces the landslide. The rise and fall of the East River level have a great influence on the groundwater flow field in the Guangliang landslide area. When the water level rises, the variation characteristics of groundwater flow field in Guangliang landslide area are as follows: the water level in slope increases with the increase of river level, and the single infiltration line is a slope curve affected by the nature of rock and soil. The slope near the empty surface is larger, and the slope degree of the infiltration line varies slightly with the increase of water level at different times, and the difference between the river level and the water level in the slope is small in macroscopic view. When the water level of the river drops, the variation characteristics of groundwater flow field in Guangliang landslide area are as follows: the water level in the landslide decreases with the decrease of the river level, and the single infiltration line is a curve with a certain slope due to the nature of the rock and soil. The slope near the goaf surface is larger, and the slope degree of the infiltration line changes slightly with the decrease of the water level at different times, and the difference between the river level near the empty surface and the water level in the slope is small. 3 in macroscopically, the difference between the water level near the empty surface and the water level in the body of the slope is small. The influence of rising of Dongjiang river level on the stability of Guangliang landslide is as follows: under the condition of rising level of Dongjiang river, the rise of water level in landslide lags behind that of river level, and the stability of landslide decreases first and then increases, and the change of stability is small. When the water level rises from 165m to 169m, the stability coefficient reaches the minimum, and the landslide stability is the worst. With the increase of water level, the landslide stability coefficient increases gradually. The increase of water level has little effect on landslide stability. The faster the water level rises, the lower the landslide stability is. The influence of Donghe water level decline on the stability of Guangliang landslide is as follows: under the condition of the Donghe water level falling, the fall of the water level in the slope lags behind that of the river level, and the stability of the landslide decreases gradually, and the stability changes greatly. When the water level of the river drops from 175m to 171m, the stability of the landslide decreases more quickly, and the stability of the landslide decreases relatively slowly after 171m. In general, the drop of the level of the river has a great influence on the stability of the landslide.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P642.22

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐曉松;鄭穎人;;水位下降對(duì)邊(滑)坡穩(wěn)定性的影響[J];公路交通科技;2007年10期

2 高慧琴;楊明明;黑亮;葉偉聰;;MODFLOW和FEFLOW在國(guó)內(nèi)地下水?dāng)?shù)值模擬中的應(yīng)用[J];地下水;2012年04期

3 陳韻俊;韓永林;張立紅;;基于遺傳神經(jīng)網(wǎng)絡(luò)的高邊坡位移分析方法研究[J];水電能源科學(xué);2010年08期

4 江偉,耿克勤;邊坡可靠性分析與評(píng)價(jià)[J];水利水電技術(shù);1994年03期

5 穆鵬;;水對(duì)滑坡的影響機(jī)理分析[J];中國(guó)西部科技;2010年28期

6 姜立春,吳愛祥,陳嘉生;高陡邊坡地下水滲流場(chǎng)三維有限元分析及其實(shí)例研究[J];湘潭礦業(yè)學(xué)院學(xué)報(bào);2003年03期

7 劉沐宇,朱瑞賡;基于模糊相似優(yōu)先的邊坡穩(wěn)定性評(píng)價(jià)范例推理方法[J];巖石力學(xué)與工程學(xué)報(bào);2002年08期

8 黃潤(rùn)秋;;20世紀(jì)以來(lái)中國(guó)的大型滑坡及其發(fā)生機(jī)制[J];巖石力學(xué)與工程學(xué)報(bào);2007年03期

9 時(shí)衛(wèi)民,鄭穎人,唐伯明,張魯渝;邊坡穩(wěn)定不平衡推力法的精度分析及其使用條件[J];巖土工程學(xué)報(bào);2004年03期

10 張開;;滑坡國(guó)內(nèi)外研究概況的綜述[J];科技創(chuàng)新導(dǎo)報(bào);2012年04期

，

本文編號(hào)：1951085