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在《混凝土重力坝设计规范》(SL319-2005)中标准双滑面的稳定性程度推荐采用等K法进行计算,但对于抗力方向角的选取并没有统一的标准,研究表明,该方法中抗力角的选取对计算结果比较敏感。为了得到合理的抗力方向角,采用Sarma法、有限元法及刚体极限平衡法中的无条分法对抗力角的选取进行了深入的探讨,并给出了抗力方向角的选取建议。最后通过具体混凝土重力坝工程实例,依据抗力角的选取建议对其沿缓倾角软弱结构面的抗滑稳定问题进行分析,并给出了其最危险滑移面。
In the “Code for Design of Concrete Gravity Dam” (SL319-2005), it is recommended to use the K method to calculate the stability of the standard double sliding surface. However, there is no uniform standard for the selection of the resistance direction angle. Studies have shown that the resistance The choice of angle is sensitive to the calculation result. In order to obtain a reasonable resistance direction angle, the selection of resistance angle is discussed in depth by the Sarma method, the finite element method and the rigid body limit equilibrium method, and the selection of the resistance direction angle is given. Finally, according to the example of concrete concrete gravity dam, the anti-skidding stability along weak-dip weak structural plane is analyzed and the most dangerous slip plane is given according to the selection of anti-stress angle.