| 小湾电站边坡卸荷三维有限元模拟 |
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| 引用本文： | 李晓春,陈剑平.小湾电站边坡卸荷三维有限元模拟[J].吉林大学学报(地球科学版),2005,35(2):195-200. |
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| 作者姓名： | 李晓春 陈剑平 |
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| 作者单位： | 吉林大学,建设工程学院,吉林,长春,130026;吉林大学,建设工程学院,吉林,长春,130026 |
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| 基金项目： | 国家自然科学基金
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高等学校博士学科点专项科研项目 |
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| 摘 要： | 应用3D-Sigma软件对小湾右岸边坡的河谷下切卸荷过程进行了三维有限元弹塑性模拟.通过缩小单元规模,对边坡坡面下180 m范围内的应力、位移情况进行了详细的模拟.模拟结果表明:由横河陡倾分布的坚硬岩层构成的边坡在河谷下切形成坡体卸荷的过程中,坡体内产生的拉应力区较小;坡内岩体变形和应力分布主要受软弱面分布、微地形、主压应力分异、剪应力集中影响;卸荷的影响深度约在坡面下120m左右及软弱面附近120 m范围内,这些区域是边坡支护设计的重点.
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| 关 键 词： | 三维弹塑性有限元 边坡卸荷 小湾电站 |
| 文章编号： | 1671-5888(2005)02-0195-06 |
| 修稿时间： | 2004年6月17日 |
3D-FEM Analysis of Unloading Rock Slope for Xiaowan Dam Site |
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| LI Xiao-chun,CHEN Jian-ping.3D-FEM Analysis of Unloading Rock Slope for Xiaowan Dam Site[J].Journal of Jilin Unviersity:Earth Science Edition,2005,35(2):195-200. |
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| Authors: | LI Xiao-chun CHEN Jian-ping |
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| Abstract: | An 3D-FEM analysis of unloading rock slope formed by erosion of the river is carried out with a program 3D-Sigma. For an accurate result, smaller elements are used. The result of analysis shows that in a intensive unloading slope with a steep and hard rock mass, in the progress of unloading, few areas with tensile stress appear, and the stress in the slope is determined by the discontinuities, shape of the slope and discontinuous stress, shear stress concentration. The influence of the unload focus on the area 120 meters under ground and the area of 120 meters around the discontinuities. |
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| Keywords: | DFEM analysis unload slope Xiaowan dam site |
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