摘要
为研究材料参数的敏感性,依托某水库扩建工程1~#泄洪洞出口顺层高边坡浅埋偏压大断面隧洞开挖,以摩尔库伦模型中五个参数为例进行敏感性研究,利用ANSYS建立三维地质有限元模型,基于FLAC^(3D)平台进行模拟,采用摩尔库伦本构模型分析围岩参数的变化对围岩位移增量的影响,基于围岩变形增量采用单因素法以及正交试验法分析1~#泄洪洞出口段岩土各参数的敏感性。两种方法结果均表明弹性模量、泊松比是主要影响参数,微小的变化就会对变形产生较大影响,黏聚力、内摩擦角、抗拉强度属于次要影响参数,对变形影响较小,计算结果对于类似工程具有一定的参考价值。
In order to study the sensitivity of material parameters,sensitivity analysis of five key parameters of KurlMoore model was conducted based on the excavation of 1~#flood discharge tunnel outlet with high slope. A large 3D numerical model of slope and tunnel was established by ANSYS,and the FLAC^（3D）platform was used for calculation.The influence of rock parameters on rock displacement increment was evaluated using Kurl-Moore model. Single index test and orthogonal test were used in the evaluation. The results indicate that the elastic modulus and Poisson＇s ratio are the main impact factors,which have large influences on the deformation and stress,whereas the cohesion,internal friction angle,and tensile strength are of the secondary parameters,which have less influence on the deformation and stress. The result may be helpful to similar engineerings.
出处
《水利与建筑工程学报》
2015年第6期85-88,177,共5页
Journal of Water Resources and Architectural Engineering
关键词
岩土参数
敏感性分析
水利枢纽
摩尔-库伦模型
单因素法
正交试验法
rock and soil parameters
analysis of parameter sensitivity
hydraulic project
Kurl-Moore model
single index test
orthogonal test
