标题：A CREEP constitutive model considering geometric damage of fractured rock mass and its application
作者：Li, Yong ;Zhou, Hao ;Zhu, Weishen ;Li, Shucai ;Liu, Tong
作者机构：[Li, Yong ;Zhou, Hao ;Zhu, Weishen ;Li, Shucai ;Liu, Tong ] Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, Shand 更多
会议名称：49th US Rock Mechanics / Geomechanics Symposium
会议日期：29 June 2015 through 1 July 2015
来源：49th US Rock Mechanics / Geomechanics Symposium 2015
摘要：More and more large-scale underground power houses are under complex geological environment of great buried depth and high in-situ stress. Meanwhile, it is complicated to analyze the long-term stability of underground caverns owing to the existence of joints in the surrounding rock mass. The joints make the degradation effect of the surrounding rock mass. According to these features, a new visco-elasto-plastic constitutive model is proposed. The model has a comprehensive consideration of geometric damage of the fractured rock mass. Besides, regarding VC++ as a terrace, we use the secondary development function of FLAC3D to make a program of this constitutive model. It is a Dynamic Link Library (DLL) and it can be used by the main program of FLAC3D. The new damage creep model of fractured rock mass is developed. In the project of Jinping I underground power houses in Sichuan, China, we use this program to analyze the long-term stability of underground caverns and guide the design of engineering. The results show that: it is quite strong feasible to use this new damage creep model to simulate the excavation of large underground caverns and analyze the long-term stability, and the analysis results can be used to guide the construction of engineering. Copyright 2015 ARMA, American Rock Mechanics Association.