摘要
通过对二滩水电站右坝肩纤闪石化玄武岩软弱岩带的实地调查,并结合室内及现场流变试验结果,建立了该软弱岩带的流变模型——三参数固体模型。应用曲线求参及有限元反演方法获得两组流变参数,并在此基础上对现场岩体的流变参数进行预测,从而确立了该软弱岩带的本构方程。随后,引进金属材料研究领域的成果,利用“转换法”求得各级正应力下的长期抗剪强度,并对现场岩体的长期抗剪强度参数进行了预测。
Based on the field investigation and the results of laboratory work as well as in-situ rheolog-ical tests, a three-parameter solid model was set up for this weak rock band as it's rheological model.Two sets of rheological parameters were obtained by way of derivation from rheological curve andFEM back-analysis. Then the rheological parameters of in-situ rock mass were predicted and the consti-tutive equation of the weak rock band was established. By introducing the accomplishment in the re-search field of metalic material, a new approch to solve for long-term strength, the transformationmethod, was presented and the long-term shear strengths under each step of vertical stress were ob-tained. Moreover, the parameter of long-term strength of in-situ rock mass was predicted.
关键词
玄武岩
岩体
流变特性
rock mass
rheological characteristics
constitutive equation
long-term strength
