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经典弹塑性力学算法中,对围岩的应力计算往往采用圆形断面进行简化,而在实际工程运用中,为了便于工程的使用,断面的形状大部分采用的是非圆形,非圆形断面如曲墙、矩形、直墙单心拱、直墙多心拱等得到了广泛的运用。因此,非圆形断面的应力计算方法就显得尤为重要。为了弄清工程上非圆形断面应力计算等代方法的准确性,文章介绍了通过“几何等代法”、“位移等代法”与“当量半径法”进行非圆形断面工程计算的方法,通过数值模拟进行了验证与比较,并提出了应用这些方法的优缺点与改进方向。最后指出,通过“位移等待法”进行围岩的应力计算在工程上能够有较好的推广前景。
In the classical elastic-plastic mechanics algorithm, the stress calculation of surrounding rock is often simplified by circular section. However, in practical engineering application, in order to facilitate the use of the project, the shape of the section most of the non-circular, non-circular section such as Curved walls, rectangular, straight wall single heart arch, straight wall and more heart arch has been widely used. Therefore, the non-circular cross-section of the stress calculation method is particularly important. In order to find out the accuracy of the equivalent method of non-circular section stress calculation in engineering, this paper introduces the method of “non-circularity” by means of “geometric equivalent method”, “displacement” and “equivalent radius method” The methods of engineering calculation of cross section are validated and compared by numerical simulation. The advantages, disadvantages and improvement directions of these methods are also proposed. Finally, it is pointed out that the stress calculation of surrounding rock through the “Displacement Waiting Method” can have a good promotion prospect in engineering.