标题：Numerical analyses and elasto-plastic behavior study on surrounding rock mass of the underground caverns in a hydropower station during deep excavations
作者：Li, Yong ;Zhu, Weishen ;Sun, Linfeng
作者机构：[Li, Yong ;Zhu, Weishen ] Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, 250061, China;[Sun, Linfeng ] Fuzhou In 更多
会议名称：GeoShanghai International Conference 2010
会议日期：3 June 2010 through 5 June 2010
来源：Geotechnical Special Publication
摘要：For the time being in China, aggressive development of the western hydroelectric resources is being performed. Taking the Shuangjiangkou (SJK) Hydropower Station as an engineering background, the elasto-plastic behavior is studied on the surrounding rock mass of the underground caverns, including the main powerhouse, the transformer house, the surge chamber, the busbar chamber, etc. in the whole process of deep excavations. A 3D numerical simulation is performed using FLAC3D. Four typical yield criteria which are Mohr-Coulomb (MC) criterion, Drucker-Prager model for the outer adjustment (DPO), Drucker-Prager model for the inner adjustment (DPI) and Zienkiewicz-Pande criterion (ZP) are all utilized in the elasto-plastic behavior study on the surrounding rock mass of the underground caverns. Among of the criteria, ZP criterion is written in the VC++7.1 compiling environment and the other three criteria are included in FLAC3D. The displacement field of the surrounding rock mass are obtained and compared under the four criteria in the process of excavations. The plastic zones are also obtained and compared in this paper. It is concluded that the results obtained through MC and DPI criteria are much greater than those obtained by the other two criteria, and the results obtained though ZP criterion are close to the practical engineering results.