摘要
针对锦屏二级水电站深埋长大引水隧洞围岩蠕变特性研究,对锦屏二级水电站的板岩进行了长达两个月的长期剪切流变试验。应用FLAC3D软件中粘弹塑性本构模型(Cvisc模型),对模拟结果进行分析,隧洞开挖后,围岩变形和应力均迅速变化,持续50天左右,围岩变形趋于某一稳定值,隧洞断面收缩量达3.5%左右,说明隧洞板岩具有硬质和完整的结构,其变形量不大,围岩变形均随时间增长而逐渐趋于收敛状态。
In the course of study on surrounding creep character of large and long water transfer tunnel at Jingping Ⅱ hydropower, a series of shear creep laboratory work for two months on marble at Jingping Ⅱ hydropower was carried out. Using the viscous -elastic constitutive model of FLAC^3D software （ Cvisc constitutive mode） and analyzing simulation results, after excavation of tunnel, rapid changing deformation and stress of tunnel, the surrounding rock of tunnel reaches a steady - state value sustaining 50 days and cross - section shrinks about 3.5%, which proves the hard and intact characters of marble. The deformation is not large and gradually reaches a constriction state with increasing time.
出处
《地下空间与工程学报》
CSCD
2006年第6期921-925,共5页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学重点基金项目(50539090)
作者简介
朱昌星（1976-），男，河海大学博士研究生，主要从事岩石力学与工程方面的研究。E—mail：zcx7685@tom．com
