摘要
边坡稳定分析中广泛使用的剩余推力法,假定条块间作用力方向与上一条块底滑面平行,其物理意义较直观合理,通过力平衡方程求得边坡稳定系数。将条间力方向(条间力剪切分量与法向分量的比值)乘以统一的修正系数(可称为推力方向修正系数),通过纳入力矩平衡方程求解修正系数,得到考虑力矩平衡的二维剩余推力法。改进后方法能够揭示不同工况条件下条间力方向可能产生的变化,提高计算结果可靠性。最后对该法进行了工程应用讨论。
The residual thrust method （RTM）, which is widely used in slope stability analysis, assumes the interslice force direction is parallel to the slip surface of the upper slice. This assumption is intuitive and reasonable. With the force equilibrium equations, stability factor can be solved. The paper puts forward the improved residual trust method. The interslice force direction is modified by multiplying the same correction coefficient. Then the correction coefficient, which is named as thrust direction correction coefficient, is solved in consideration of moment equilibrium. The improvcd residual thrust method can reveal the possible changes of interslice force direction under different calculation conditions, may improve the reliability of calculation. At last, the improved residual thrust method is applied in practical engineering and the results are discussed.
出处
《长江科学院院报》
CSCD
北大核心
2008年第6期67-70,共4页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金面上项目(50509003)
水利部岩土力学与工程重点实验室开放基金
关键词
极限平衡分析
剩余推力法
力矩平衡
稳定系数
条间力方向
limit equilibrium analysis
residual thrust method
moment equilibrium
factor of stability
interslice force direction
