标题：Implementation of the intelligent and continuous optimization method in underground engineering, Part II: On the optimization of spatial distribution of large-scale underground powerhouse
作者：Wang, Hui ;Chen, Wei-Zhong ;Li, Ting-Chun ;Wang, Qing-Biao
作者机构：[Wang, Hui ;Wang, Qing-Biao ] Department of Resources and Civil Engineering, Shandong University of Science and Technology, Tai'an 271019, China;[Li, 更多
来源：Shuili Xuebao/Journal of Hydraulic Engineering
摘要：Based on the modified Rabotnov damage theory, a nonlinear creep damage constitutive model of rock mass has been established for a supported project. The parameters of the constitutive model were identified by means of the laboratory triaxial creep test result of dolomitic limestone. Meanwhile, the nonlinear creep damage model was programmed into the subroutine of ABAQUS to make secondary development, by which the laboratory triaxial creep test process of metamorphic limerock was simulated. The creep time-history curve obtained by the numerical simulation is consistent with the test curve well. Then, the intelligent and continuous optimization method of underground engineering which had been realized in part I of this paper series was applied to the reasonable spatial distribution optimization for underground powerhouse of Houziyan hydropower station in the Dadu River of Sichuan Province. A parametric model has been established, which considers the creep property of surrounding rock, stepped excavation of underground powerhouse and the supporting system. Through optimization analysis, it is obtained the best space distribution scheme suitable for engineering construction. Comparison of the calculation results between optimization scheme and designed one, the rationality of the optimization scheme has been verified.