论文部分内容阅读
引言自从数值计算应用于岩上工程以后,围岩的稳定分析,已由定性评价向定量计算发展。特别是迅速发展的有限单元法.对于符合连续介质力学模型的围岩,国内外已有许多较为完善的计算程序。但实践证明,用数值计算法对围岩进行分析的结果是否符合实际,在很大程度上决定于弹性模量 E 的取值正确与否。仅管数值计算在方法和技巧上可以不断改进.以提高计算精度,但是若 E 的取值与实际不符,计算结也难以他人信任。所以如何正确的确定 E值已成了当前地下工程中一个重要课题。
Introduction Since the numerical calculation was applied to the on-shore engineering, the stability analysis of the surrounding rock has evolved from qualitative evaluation to quantitative calculation. In particular, the rapid development of the finite element method. For the surrounding rock that meets the continuum mechanics model, there are many well-established calculation procedures at home and abroad. However, it has been proved in practice that whether the results of the analysis of the surrounding rock by numerical calculations are in line with reality depends to a large extent on whether the value of the elastic modulus E is correct or not. Although numerical calculation can be continuously improved in terms of methods and techniques to improve the accuracy of calculations, if the value of E does not correspond to the actual value, it is hard for others to trust the calculation results. Therefore, how to correctly determine the E value has become an important issue in the current underground engineering.