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| EXPERIMENTAL STUDY OF ANCHORING EFFECT OF DISCONTINUOUS JOINTED ROCK MASS UNDER UNIAXIAL TENSION |
| LI Shucai1，ZHANG Ning2，LU Aizhong2，LI Mingtian1，3，YANG Lei1 |
(1. Geotechnical and Structural Engineering Research Center，Shandong University，Jinan，Shandong 250061，China；
2. Institute of Hydroelectric and Geotechnical Engineering，North China Electric Power University，Beijing 102206，China；
3. Department of Civil Engineering，Shandong Jiaotong University，Jinan，Shandong 250023，China) |
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Abstract The modified rubber powder-cement mortar and glass fiber reinforced plastics (GFRP) are used to simulate the rock and bolt，respectively. The reinforced effect of bolt on rock mass with perforation joints is studied by laboratory uniaxial tension test. The experimental results show that: (1) Comparison with the failure shape of sample without bolts，the anchored samples present the plastic failure characteristic. (2) The bolts enhance the deformation modulus and uniaxial tensile strength of the jointed rock mass；and the deformation modulus and uniaxial tensile strength increase at first，then decrease with the increase of the anchoring angles. (3) The latter failure modes of reinforced samples change with the increase of anchoring angles，which is relative to the combined effect of bond performance and shear resistance properties.
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Received: 06 August 2010
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2011, Vol. 30 
