RESEARCH ON CONSTITUTIVE MODEL OF MARBLE OF JINPING HYDROPOWER STATION UNDER LOADING AND UNLOADING CONDITIONS
LI Hongzhe1，2，3，XIA Caichu1，2，XIAO Weimin1，2
(1. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；3. Beijing Zhongjiao Qiaoyu Technology Co.，Ltd.，Beijing 100176，China)
Abstract：A series of loading and unloading tests of marble from deep-buried diversion tunnel of Jinping hydropower station are carried out，which reveal that marble specimens have remarkable volumetric dilatancy before failure in both loading and unloading conditions. To describe the law of volumetric deformation of marble in the tests，a new constitutive model is presented based on modifying Weng¢s model[13] of rock mass. Comparison between theoretical and test results indicated that the proposed model can describe the characteristics of marble volumetric deformation well. This model can consider the discrepancy of rock strength under loading and unloading conditions；and it can be used to describe unloading process from uniaxial compression stage；the proposed model is of high applicability.
李宏哲,夏才初,肖维民，. 锦屏水电站大理岩加卸荷本构模型研究 [J]. 岩石力学与工程学报, 2010, 29(07): 1489-1495.
LI Hongzhe1，2，3，XIA Caichu1，2，XIAO Weimin1，2. RESEARCH ON CONSTITUTIVE MODEL OF MARBLE OF JINPING HYDROPOWER STATION UNDER LOADING AND UNLOADING CONDITIONS . , 2010, 29(07): 1489-1495.
