|
三峡永久船闸高边坡开挖三维离散元数值模拟
3-D simulation of the excavation of high steep slope of Three-Gorges permanent lock by distinct element method
查看参考文献8篇
文摘
|
采用面-面接触的三维离散元刚性块体模型,从实测节理面中取出其中的三组,按照其倾向、倾角和节理间距将三峡永久船闸未开挖的区域划分为10~5个离散单元,通过施加力边界条件,给出了与实测初始地应力场接近的数值模拟结果;然后,分4步模拟了永久船闸的开挖过程。计算结果表明:开挖过程会引起节理面出现张开趋势,个别岩体还会沿着节理面滑移。岩体位移的不对称现象较为自然地说明了由节理引起的岩体各向异性特征。 |
其他语种文摘
|
According to plane to plane contact model of 3-D distinct element method (DEM) and three sets of joints obtained from site measurement, 100 000 blocks were used to simulate the Three-Gorges permanent lock high steep slope area. The computation consists of the simulation of the initial stress by acting force boundary condition and the process of excavation. Obtained initial stress field is consistent with the measurement data. The process of excavation was simulated by four-step excavation. The results show that the process of excavation can stir expansion of joint layers and thus some blocks may slide along joints. The displacement of rock is asymmetry and this fact naturally illustrates the anisotropic character of rock mass. |
来源
|
岩土力学
,2002,23(3):272-277 【核心库】
|
关键词
|
离散元
;
高边坡
;
岩体
;
节理
|
地址
|
中国科学院力学研究所, 北京, 100080
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
1000-7598 |
学科
|
公路运输 |
文献收藏号
|
CSCD:1017267
|
参考文献 共
8
共1页
|
1.
哈秋舲.
长江三峡工程岩石边坡各向异性岩体卸载非线性力学研究-永久船闸陡高边坡岩体力学研究(三),1997
|
被引
1
次
|
|
|
|
2.
孙钧. 三峡工程永久船闸高边坡岩体稳定与变形分析.
岩土工程青年专家学术论坛文集,1998:1-19
|
被引
1
次
|
|
|
|
3.
.
三峡船闸高边坡开挖与锚固数值模拟及稳定性评价,1994
|
被引
1
次
|
|
|
|
4.
.
长江三峡工程永久船闸工程高边坡三维有限元非线性分析,1995
|
被引
1
次
|
|
|
|
5.
鲁军. 岩体动静力稳定分析的三维离散元数值模型.
清华大学学报(自然科学版),1996,36:98-104
|
被引
8
次
|
|
|
|
6.
Cundall P A. A discrete numerical model for granular assemblies.
Geotechnique,1979,29(1):47-65
|
被引
1353
次
|
|
|
|
7.
Dowding C H. A coupled Finite Element-Rigid Block Method for transient analysis of caverns.
International Journal for Numerical and Analytical Methods in Geomechanics,1983,7:117-127
|
被引
9
次
|
|
|
|
8.
王泳嘉.
离散单元分及其在岩土力学中的应用,1991
|
被引
160
次
|
|
|
|
|
|