小浪底地下厂房围岩稳定计算地质模型的研究

Study of the Geological Model of the Stability Calculation of the Surrounding Rock of the Underground Powerhouse of Xiaolangdi Project

根据工程勘探资料,在分析小浪底枢纽地下厂房区主要结构面的分布规律及其特征的基础上,建立了几何传真概化地质模型,并采用不连续介质有限元离散化计算模型,模拟计算地下厂房围岩的应力应变。计算结果表明,所建立的概化地质模型符合实际地质状况,计算的应力分布与实测的变形特征相吻合,这与目前按常用的其它模型及连续介质计算的结果有明显不同。

According to the exploration data,this paper,based on the analysis of the distribution lawand characteristic of the main structure of Xiaolangdi Project,established a geometically descrip-tive simulation model and calculated the stress and strain of surrounding rock of the undergroundpowerhouse by finite element dispersive mathematic model for discontinuous mediums.The solu-tion indicated that this model is in accordance with actual geological condition,the calculatedstress distribution conformed with measured deformation feature,which was obviously differentfrom the solutions of conventionally used models and methods for continuous mediums.