新型可回收锚杆锚固段应力分布规律

为了研究新型可回收锚杆锚固段应力分布规律,剖析了现有锚固段应力计算公式的局限性,引用圆形均布荷载作用下位移的解推导出新型可回收锚杆的锚固段应力分布计算公式,与现有锚固段应力计算公式进行准确性对比,并分析了相关岩土体参数对锚固段应力分布的影响.结果表明,推导得出的锚固段应力计算公式更符合实际;弹模比和内摩擦角对锚固段应力分布规律影响较大,弹模比越小,内摩擦角越大,应力分布曲线变化越平缓,但当内摩擦角大于35°之后,其对应力分布曲线影响非常小;泊松比对锚固段应力分布规律影响非常小.

Stress distribution along bonded length of new-type recoverable anchor

To analyze the dist ribut io n of stress along bonded leng th of a new -type recov erable anchor, thedef iciencies of the current calculat ion formulas w ere analy zed. According to the calculat io n fo rmula o f thedisplacement under the circular uniformly dist ributed loads, the dist ribut ion formulas of st ress along bondedleng th of the new -ty pe recoverable anchor w ere deduced w ho se accuracy w as compared w ith other calculation formulas. The st ress dist ribut ion alo ng bonded length was analyzed w ith various parameters. T heresult s show that the calculat ion formulas of the bo nded length deduced in this paper are more accurate,that the rat io of elast ic modulus and the inter nal fr ict io n ang le have an o bvious impact on the dist ributionof str ess along the bonded length, and that the smal ler the rat io o f elast ic modulus and the bigger the internalf rict ion angle, the slow er the dist ribut io n of str ess chang es. How ev er , if the internal f rict ion angleis big ger than 35°,it has l it t le impact o n the str ess dist ribut io n, and poisson Rat io n has lit t le impact on thedistr ibution of st ress alo ng the bo nded length.