DEVELOPMENT OF TRUE TRIAXIAL EXPERIMENT SYSTEM FOR MIDDLE SIZED ROCK SAMPLE AND ITS APPLICATIONS
LI Weishu，HUANG Shuling，DING Xiuli，ZHONG Zuowu，WU Aiqing
(Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources，Yangtze River Scientific Research Institute，Wuhan，Hubei 430010，China)
Abstract：Currently，the dimensions of rock samples used in true triaxial experiment are either too large or too small，the span of dimension is large and magnitudes of stress levels are different，which brings inconvenience to the study of size effect of strength for rock mass in triaxial stressed conditions as well as its deformation and strength characteristics under complex stress path. To cope with this issue，the true triaxial experiment system for middle sized rock samples，named LWZ–10000，is developed. The design concept，composition feature，technical indexes and main function are introduced in detail. The system has such noticeable features as follows：(1) Automatic servo control and data collection during whole process of deformation failure with high precision and stable performance. (2) The dimension of rock samples is between that used in laboratory experiment and in field experiment. Moreover，the dimension can be altered in a certain range. (3) The magnitudes of lateral and axial loads can be large and the magnitudes are controlled independently in three loading directions. (4) Ultrasonic and acoustic emission experiments can be conducted simultaneously. A lot of true triaxial experiments for Jinping marble samples under different stress paths are carried out by the developed system. The whole process stress-strain curves and the relationships with wave speeds in true triaxial experiments under loading and unloading paths are analyzed. Combining with the true triaxial experiment results of different sized marbles under unloading path，the size effect of strength parameters for marble under unloading path is preliminarily studied. The successful development of this system provides new approach to studying the deformation and strength characteristics of deep rock mass considering multidirectional stress state and different stress paths.
李维树，黄书岭，丁秀丽，钟作武，邬爱清. 中尺寸岩样真三轴试验系统研制与应用[J]. 岩石力学与工程学报, 2012, 31(11): 2197-2203.
LI Weishu，HUANG Shuling，DING Xiuli，ZHONG Zuowu，WU Aiqing. DEVELOPMENT OF TRUE TRIAXIAL EXPERIMENT SYSTEM FOR MIDDLE SIZED ROCK SAMPLE AND ITS APPLICATIONS. , 2012, 31(11): 2197-2203.
黄书岭，冯夏庭，张传庆. 脆性岩石广义多轴应变能强度准则及试验验证[J]. 岩石力学与工程学报，2008，27(1)：124-134.(HUANG Shuling，FENG Xiating，ZHANG Chuanqing. A new generalized polyaxial strain energy strength criterion of brittle rock and polyaxtal test validation[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(1)：124-134.(in Chinese))
[2]
周火明，盛 谦，邬爱清. 三峡工程永久船闸边坡岩体宏观力学参数的尺寸效应研究[J]. 岩石力学与工程学报，2011，20(5)：661-664.(ZHOU Huoming，SHENG Qian，WU Aiqing. Size effect analysis of macro-mechanics parameters for the rock masses of TGP ship lock slope[J]. Chinese Journal of Rock Mechanics and Engineering，2011，20(5)：661-664.(in Chinese))
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2012, Vol. 31 
