单轴拉伸条件下断续节理岩体锚固效应试验研究

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摘要选用改性橡胶粉–水泥砂浆模拟岩石，用玻璃纤维增强塑料作为锚杆模拟材料，通过室内试验研究单轴拉伸条件下，锚杆对含贯穿裂隙岩体的加固效应。结果表明：与不加锚试件的破坏形式相比，加锚试件均表现出塑性破坏特征；锚杆提高了节理岩体的变形模量和单轴抗拉强度，且加锚试件的变形模量和单轴抗拉强度随锚固角的增大先增大后减小；随着锚固角的增大，试件后期破坏模式发生改变，这与锚杆的黏结性能和抗剪切性能的复合作用有关。

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关键词 ：岩石力学, 单轴拉伸, 节理岩体, 锚固效应, 破坏模式

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.

Key words： rock mechanics uniaxial tension jointed rock mass anchoring effect failure mode

收稿日期: 2010-08-06

引用本文:

李术才1，张宁2，吕爱钟2，李明田1，3，杨磊1. 单轴拉伸条件下断续节理岩体锚固效应试验研究[J]. 岩石力学与工程学报, 2011, 30(8): 1579-1586.
LI Shucai1，ZHANG Ning2，LU Aizhong2，LI Mingtian1，3，YANG Lei1. EXPERIMENTAL STUDY OF ANCHORING EFFECT OF DISCONTINUOUS JOINTED ROCK MASS UNDER UNIAXIAL TENSION. , 2011, 30(8): 1579-1586.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I8/1579

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