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| DEVELOPMENT OF ROCK MASS TRUE-TRIAXIAL SITE CREEP TESTING SYSTEM AND ITS APPLICATION |
| LI Weishu1，ZHOU Huoming1，ZHONG Zuowu1，ZHANG Yihu1，HAO Qingze2 |
| (1. Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources，Yangtze River Scientitic Research Institute，Wuhan，Hubei 430010，China；2. Zhaoyang Testing Instruments Co.，Ltd.，Changchun，Jilin 152500，China) |
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Abstract In light of the characteristics such as complicated stress variation after excavation unloading in high geostress environment，RXZJ–20000-typed computer servo-control rock mass true-triaxial site creep testing system has been developed. The main structure，function features and usage of the system are introduced in detail. Verified by the actural engineering practice，the system has the following features of high geostress，large size，complete process of stress and strain，high precision，high efficiency，multifunction and convenient for removing and installation. The system has changed the status that true-triaxial site creep test equipment has a low loading level，big pressure fluctuations，low test precision，single stress path and low degree of automation at present. The successful manufacture of the RXZJ–20000-typed rock mass true-triaxial site creep test system provides a new way to the study of the time-effect of deep rock under the condition of multiaxial stress；and it is the most advanced larger servo test instrument at home and aboard. It is suitable for long-term creep test of the hard and soft rock masses of large-scale artificial slope，deep large-span tunnel and underground caverns.
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Received: 16 April 2012
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2012, Vol. 31 
