冬冻春融及路基填筑对高含水滑坡变形的影响分析
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摘要
结合麦秀山地区的工程地质特点,运用MIDAS,PHASE2有限元软件,分析了冬冻春融及路基填筑对高含水滑坡稳定性的影响。渗流规律的变化可能会对滑坡的稳定性造成影响;在路基填筑且春融坡面解冻前,整个坡体都是稳定的;路基填筑且春融坡面解冻后,高动水压力形成流土通道诱发滑坡进一步变形;填筑路基将导致坡体发生向下向前的位移。
Combined with the engineering geological features of Maixiushan area in Qinghai Province, MIDAS and PHASE2 finite element software were used to analyze the influence of cycle of freezing in winter and thawing in spring and subgrade filling on the stability of landslide with high moisture. The change of seepage law may affect the stability of the landslide. Before the subgrade filling and slope is thawing on the spring, the entire slope is stable; after subgrade filling and slope is thawing on the spring, high dynamic water pressure leads to the formation of flowing soil channels, which induces further deformation of the landslide; Subgrade filling will cause the slope to move downward and forward.
Combined with the engineering geological features of Maixiushan area in Qinghai Province, MIDAS and PHASE2 finite element software were used to analyze the influence of cycle of freezing in winter and thawing in spring and subgrade filling on the stability of landslide with high moisture. The change of seepage law may affect the stability of the landslide. Before the subgrade filling and slope is thawing on the spring, the entire slope is stable; after subgrade filling and slope is thawing on the spring, high dynamic water pressure leads to the formation of flowing soil channels, which induces further deformation of the landslide; Subgrade filling will cause the slope to move downward and forward.
引文
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[2] 郑长安,巢万里.极端冰雪条件下边坡稳定性分析[J].公路工程,2012,37(3):42-44,72.ZHENG C A,CHAO W L.Slope stability analysis under extreme snow weather[J].Highway Engineering,2012,37(3):42-44,72.
[3] 陈玉超.冻融环境下岩土边坡稳定性研究初探[D].西安:西安科技大学,2006.CHEN Y C.Preliminary study on rock and soil slope stability under the freezing-thawing condition[D].Xi'an:Xi'an University of Science and Technology,2006.
[4] 范冰,彭富强,罗萍.几种主要因素对边坡体变形特性的影响性能研究[J].公路工程,2012,37(6):45-47.FAN B,PENG F Q,LUO P.Research on the major factors which take influence on the deformation characteristic of slope soil[J].Highway Engineering,2012,37(6):45-47.
[5] 姚海林,郑少河,李文斌,等.降雨入渗对非饱和膨胀土边坡稳定性影响的参数研究[J].岩石力学与工程学报,2002,21(7):1034-1039.YAO H L,ZHENG S H,LI W B,et al.Parametric study on the effect of rain infiltration on stability of unsaturated expansive soil slope[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(7):1034-1039.
[6] 张武洪.高含水滑坡发生机理及防治技术研究[D].成都:西南交通大学,2009.ZHANG W H.Study on developing mechanism and prevention and treatment technology for landslide with high moisture[D].Chengdu:Southwest Jiaotong University,2009.
[7] 蒋亮,李世贵.成都至兰州铁路金溪特大桥边坡稳定性及防治方案研究[J].公路工程,2012,37(3):30-35.JIANG L,LI S G.Research of protective scheme and stability about the Jinxi Extra Large bridge slope in Chengdu-Lanzhou Railway[J].Highway Engineering,2012,37(3):30-35.
[8] 梁志勇.山区高速公路高填斜陡路堤稳定性研究[J].公路工程,2012,37(3):85-88.LIANG Z Y.The research of the stability of high filled steep embankment of mountain highway[J].Highway Engineering,2012,37(3):85-88.
[9] 朱伟,山村和也.雨水·洪水渗透时河堤的稳定性[J].岩土工程学报,1999,21(4):414-419.ZHU W,Kazuya Y.Stability of river embankment under the seepage of rain or flood[J].Chinese Journal of Geotechnical Engineering,1999,21(4):414-419.
[10] 张家发.三维饱和非饱和稳定非稳定渗流场的有限元模拟[J].长江科学院院报,1997,14(3):35-38.ZHANG J F.Simulation of 3D saturated unsaturated and steady unsteady seepage field by FEM[J].Journal of Yangtze River Scientific Research Institute,1997,14(3):35-38.
[11] 郑颖人,赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3381-3388.ZHENG Y R,ZHAO S Y.Application of strength reduction FEM in soil and rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(19):3381-3388.
[12] Zienkiewicz O C,Humpheson C,Lewis R W.Associated and non-associated visco-plasticity and plasticity in soil mechanics[J].Géotechnique,1975,25(4):671-689.
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