高速遠程滑坡—碎屑流及其涌浪數(shù)值模擬分析
發(fā)布時間：2018-08-16 08:26
【摘要】：近年來,具有高位、遠程、高速特點的高山峽谷區(qū)滑坡災(zāi)害發(fā)生頻繁。在滑坡發(fā)生的過程中,滑體高速碰撞解體后沿溝谷形成碎屑流。當滑坡-碎屑流前方存在水體時,滑體高速入水,激起涌浪。本文以雞冠嶺滑坡-碎屑流、福泉小壩滑坡為典型實例,通過滑坡動力分析軟件DAN-W反演滑坡入水前運動過程;在DAN-W模擬結(jié)果的基礎(chǔ)上,采用FLUENT軟件建立滑體開始入水后涌浪數(shù)值模型,對滑坡產(chǎn)生涌浪及其傳播過程進行研究,主要工作和成果有:1.以雞冠嶺滑坡-碎屑流、福泉小壩滑坡這兩個高速遠程滑坡實例為基礎(chǔ)背景,建立DAN-W理想模型,模擬滑坡入水前滑體形態(tài)、速度分布及堆積體分布等特征。為FLUENT模擬涌浪提供了入水速度及滑體形態(tài)的參考數(shù)值。2.利用FLUENT軟件,選取Heinrich物理試驗進行二維物理模型驗證。數(shù)值模擬結(jié)果與模型試驗較好吻合,表明FLUENT軟件能夠精確模擬滑塊沿斜坡入水所產(chǎn)生涌浪及其傳播過程,為模擬滑坡實例的涌浪災(zāi)害提供了可能。3.簡述雞冠嶺滑坡-碎屑流、福泉小壩滑坡的工程地質(zhì)條件、滑坡運動特征及堆積體分布。在DAN-W計算結(jié)果的基礎(chǔ)上,利用FLUENT軟件分別建立雞冠嶺滑坡-碎屑流、福泉小壩滑坡入水后產(chǎn)生涌浪的二維數(shù)值模型,將滑體等效為流體,進行滑坡涌浪過程模擬分析。4.基于FLUENT軟件對Liu物理模型試驗進行三維數(shù)值模擬,數(shù)值模擬結(jié)果與試驗監(jiān)測值可較好吻合。模擬結(jié)果表明:在橫軸方向上,涌浪傳播形成正負波;在徑向方向上,涌浪在中心線附近的水面發(fā)生明顯波動,水面沿中心線對稱變化。
[Abstract]:In recent years, landslide disasters occurred frequently in high, long-range and high-speed mountain canyons. In the process of landslide, debris flow is formed along the gully after the high-speed collision and disintegration of the sliding body. When there is water in front of the landslide-debris flow, the sliding body enters the water at high speed and arouses waves. This paper takes Jiguanling landslide-debris flow and Fuquan Xiaoba landslide as a typical example, and inverts the movement process of landslide before entering water through landslide dynamic analysis software DAN-W, based on the results of DAN-W simulation. The numerical model of surge wave after the sliding body began to enter the water is established by using FLUENT software. The main work and results are as follows: 1: 1. The main work and results are as follows: 1. The process of landslide surge and its propagation are studied. Based on the examples of Jiguanling landslide-clastic flow and Fuquan Xiaoba landslide, an ideal DAN-W model is established to simulate the shape, velocity distribution and accumulative body distribution of the landslide before it enters the water. It provides a reference value of inflow velocity and sliding body shape for FLUENT simulation of surge wave. Using FLUENT software, Heinrich physical experiment is selected to verify the two-dimensional physical model. The numerical simulation results are in good agreement with the model test, which indicates that the FLUENT software can accurately simulate the surge and its propagation process caused by the sliding block entering the slope, which provides the possibility of simulating the surge disaster of the landslide example. This paper briefly describes the engineering geological conditions of Jiguanling landslide, debris flow, Fuquan Xiaoba landslide, landslide movement characteristics and accumulation body distribution. Based on the results of DAN-W calculation, the two-dimensional numerical model of surge wave was established by using FLUENT software to simulate the process of landslide surge in Jiguanling landslide and Fuquan Xiaoba landslide after entering water. The sliding body was equivalent to fluid, and the simulation analysis of landslide surge process was carried out. Three-dimensional numerical simulation of Liu physical model test based on FLUENT software shows that the numerical simulation results are in good agreement with the experimental results. The simulation results show that the inrush wave propagates positive and negative waves in the transverse axis direction, and in the radial direction, obvious waves fluctuate in the water surface near the center line, and the water surface changes symmetrically along the center line.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P642.22
本文編號：2185444
[Abstract]:In recent years, landslide disasters occurred frequently in high, long-range and high-speed mountain canyons. In the process of landslide, debris flow is formed along the gully after the high-speed collision and disintegration of the sliding body. When there is water in front of the landslide-debris flow, the sliding body enters the water at high speed and arouses waves. This paper takes Jiguanling landslide-debris flow and Fuquan Xiaoba landslide as a typical example, and inverts the movement process of landslide before entering water through landslide dynamic analysis software DAN-W, based on the results of DAN-W simulation. The numerical model of surge wave after the sliding body began to enter the water is established by using FLUENT software. The main work and results are as follows: 1: 1. The main work and results are as follows: 1. The process of landslide surge and its propagation are studied. Based on the examples of Jiguanling landslide-clastic flow and Fuquan Xiaoba landslide, an ideal DAN-W model is established to simulate the shape, velocity distribution and accumulative body distribution of the landslide before it enters the water. It provides a reference value of inflow velocity and sliding body shape for FLUENT simulation of surge wave. Using FLUENT software, Heinrich physical experiment is selected to verify the two-dimensional physical model. The numerical simulation results are in good agreement with the model test, which indicates that the FLUENT software can accurately simulate the surge and its propagation process caused by the sliding block entering the slope, which provides the possibility of simulating the surge disaster of the landslide example. This paper briefly describes the engineering geological conditions of Jiguanling landslide, debris flow, Fuquan Xiaoba landslide, landslide movement characteristics and accumulation body distribution. Based on the results of DAN-W calculation, the two-dimensional numerical model of surge wave was established by using FLUENT software to simulate the process of landslide surge in Jiguanling landslide and Fuquan Xiaoba landslide after entering water. The sliding body was equivalent to fluid, and the simulation analysis of landslide surge process was carried out. Three-dimensional numerical simulation of Liu physical model test based on FLUENT software shows that the numerical simulation results are in good agreement with the experimental results. The simulation results show that the inrush wave propagates positive and negative waves in the transverse axis direction, and in the radial direction, obvious waves fluctuate in the water surface near the center line, and the water surface changes symmetrically along the center line.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P642.22
【參考文獻】
相關(guān)期刊論文 前7條
1 姜治兵,金峰,盛君;滑坡涌浪的數(shù)值模擬[J];長江科學院院報;2005年05期
2 許強;董秀軍;;汶川地震大型滑坡成因模式[J];地球科學(中國地質(zhì)大學學報);2011年06期
3 胡新麗;唐輝明;朱麗霞;;汶川震中巖漿巖高邊坡破壞模式與崩塌機理[J];地球科學(中國地質(zhì)大學學報);2011年06期
4 柴賀軍,王士天,許強,黃潤秋,范相德;西藏易貢滑坡物質(zhì)運動全過程數(shù)值模擬研究[J];地質(zhì)災(zāi)害與環(huán)境保護;2001年02期
5 李樹武;劉惠軍;;某水電站庫區(qū)滑坡滑速涌浪預(yù)測[J];地質(zhì)災(zāi)害與環(huán)境保護;2006年01期
6 齊超;邢愛國;殷躍平;李濱;;東河口高速遠程滑坡-碎屑流全程動力特性模擬[J];工程地質(zhì)學報;2012年03期
7 徐文杰;;滑坡涌浪影響因素研究[J];工程地質(zhì)學報;2012年04期
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