本文選題：未完全受阻滑坡 + 運(yùn)動(dòng)距離　； 參考：《地震地質(zhì)》2017年04期

【摘要】：地形條件、啟動(dòng)機(jī)制和巖性條件是滑坡運(yùn)動(dòng)的主要影響因素。通過(guò)分析汶川地震誘發(fā)的215處體積1×10~4m~3的未完全受阻滑坡的運(yùn)動(dòng)場(chǎng)地地形條件、巖性、地震烈度、巖層傾向與坡向的關(guān)系,建立各影響因素的分類指標(biāo),分析各影響因素對(duì)滑坡運(yùn)動(dòng)距離的影響及作用機(jī)制。研究結(jié)果表明:場(chǎng)地地形條件不僅顯著地影響了大型滑坡的運(yùn)動(dòng)距離,而對(duì)中小型滑坡同樣有效,是同等規(guī)模下滑坡運(yùn)動(dòng)距離產(chǎn)生差異的最主要影響因素。運(yùn)動(dòng)場(chǎng)地地形條件中溝谷順直型滑坡的運(yùn)動(dòng)距離最大,隨后依次為凹面型、階梯型、溝谷偏轉(zhuǎn)型、坡腳堆積型和坡面堆積型,由巖性、地震烈度和巖層傾向與坡向關(guān)系確定的滑坡成因模式或啟動(dòng)機(jī)制對(duì)中小型規(guī)模的滑坡運(yùn)動(dòng)距離影響不顯著。對(duì)于體積1×10~6m~3的大型滑坡,同等規(guī)模下中等硬度巖性的運(yùn)動(dòng)距離大于堅(jiān)硬巖體和軟巖;在Ⅸ—Ⅺ度地震烈度區(qū),與滑坡點(diǎn)密度和面積密度的分布規(guī)律相反,滑坡運(yùn)動(dòng)距離隨烈度的增加而減小;坡體結(jié)構(gòu)雖然影響了滑坡發(fā)育的分布規(guī)律和成因模式,但對(duì)滑坡運(yùn)動(dòng)距離的作用卻不顯著。
[Abstract]:Topographic conditions, start-up mechanism and lithologic conditions are the main influencing factors of landslide movement. Based on the analysis of the relationship between the terrain condition, lithology, seismic intensity, rock tendency and slope direction of the unobstructed landslide with a volume of 1 脳 10~4m~3 induced by the Wenchuan earthquake, the classification indexes of the influencing factors are established. The influence of various factors on the distance of landslide movement and its mechanism are analyzed. The results show that the site terrain condition not only significantly affects the movement distance of large landslide, but also is effective for small and medium-sized landslide, which is the main influencing factor for the difference of landslide movement distance in the same scale. In the terrain conditions of sports site, the movement distance of the trench and straight landslide is the largest, followed by concave type, ladder type, valley deflection type, slope foot accumulation type and slope surface accumulation type. The landslide origin model or start-up mechanism determined by the relationship between seismic intensity and rock inclination and slope direction has no significant effect on the movement distance of small and medium-sized scale landslide. For large landslide with volume of 1 脳 10~6m~3, the movement distance of medium hardness rock at the same scale is larger than that of hard rock and soft rock, and the distribution law of density and area density of landslide point is contrary to that of seismic intensity zone of degree IX-XI. The distance of landslide movement decreases with the increase of intensity, and the structure of slope body affects the distribution law and genetic model of landslide development, but the effect on the distance of landslide movement is not significant.
【作者單位】： 西南科技大學(xué)土木工程與建筑學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41272297,41401195,41472325) 四川省科技廳項(xiàng)目(2014JY0121) 四川省教育廳重點(diǎn)項(xiàng)目(14ZA0095) 綿陽(yáng)市科技計(jì)劃項(xiàng)目(16S-02-4)共同資助
【分類號(hào)】：P642.22

【相似文獻(xiàn)】

相關(guān)期刊論文 前3條

1 劉丹;葉四橋;楊威;;落石水平運(yùn)動(dòng)距離影響因素的模型試驗(yàn)研究[J];水文地質(zhì)工程地質(zhì);2013年06期

2 樊曉一;黃潤(rùn)秋;喬建平;曾耀勛;段曉冬;;未受河流阻止的滑坡水平運(yùn)動(dòng)距離與滑坡堵江判別[J];水文地質(zhì)工程地質(zhì);2014年01期

3 方華;崔鵬;;汶川地震大型高速遠(yuǎn)程滑坡力學(xué)機(jī)理及控制因子分析[J];災(zāi)害學(xué);2010年S1期

相關(guān)會(huì)議論文 前1條

1 方華;崔鵬;;汶川地震大型高速遠(yuǎn)程滑坡力學(xué)機(jī)理及控制因子分析[A];第三屆全國(guó)城市與工程安全減災(zāi)學(xué)術(shù)研討會(huì)論文集[C];2010年

，

本文編號(hào)：2062697