压力型可回收式锚杆锚固段应力分布
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Distribution of stress along bonded length of pressure type recoverable anchor
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    摘要:

    利用弹性力学理论计算了锚固体因轴向压缩导致径向膨胀而产生的径向应变,并与土力学理论相结合计算出砂浆体挤压周围岩土体产生的径向应变。根据锚固体与周围岩土体边界面上的变形协调假定,推导出了压力型可回收式锚杆锚固段应力分布的理论解,并与现有理论结果进行对比。结果表明:理论解比现有理论结果更加贴近实际。基于理论解讨论了锚固体与岩土体弹性模量之比E1/E2、岩土体泊松比μ、锚固体外半径R对锚固段上的峰值剪应力及其应力分布范围的影响。结果表明:E1/E2R越小,μ越大,峰值剪应力越大,剪应力分布范围越小。

    Abstract:

    Based on elastic mechanics and soil mechanics theory and radial deformation coordination conditions between the anchor body outer and the surrounding rock, the distribution formulas of stress along the bonded length of pressure type recoverable anchor were derived. Compared with existing theoretical results,the formulas were proved to be more practical. The peak value and range of shear stress were analyzed with various of the ratio of the anchor body's elastic modulus to the rock-soil body's E1/E2 and the poisson's ratio of rock-soil body μ and anchor body's outer radius R, Results show that E1/E2 and R are opposite to the value of peak shear stress but positive to shear stress range while μ is on the contrary.

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唐士鑫,阴可,刘汉龙.压力型可回收式锚杆锚固段应力分布[J].土木与环境工程学报(中英文),2018,40(2):1-5. Tang Shixin, Yin Ke, Liu Hanlong. Distribution of stress along bonded length of pressure type recoverable anchor[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2018,40(2):1-5.10.11835/j. issn.1674-4764.2018.02.001

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  • 收稿日期:2017-03-14
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  • 在线发布日期: 2018-03-08
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