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Development of a novel resilient anchor cable and its large shear deformation performance
International Journal of Rock Mechanics and Mining Sciences ( IF 7.0 ) Pub Date : 2023-01-23 , DOI: 10.1016/j.ijrmms.2022.105293
Chang Zhou , Cheng Huang , Youdong Chen , Qinghong Dong , Wanghua Sui

Continuous and stepwise deformation of landslides occur widely during seasonal rainfall and reservoir operation. Therefore, it is important to develop resilient stabilizing structures to ensure that they continue to function even when large deformations occur. In this study, a new anchor cable with a high support and large shear deformation is proposed. The anchor cable primarily consists of free, grouting, and adaptive sections, which are connected using hinge connections. The adaptive section consists of an anchor with multiple trapezoidal gears, sleeve tube, connecting rod, and bearing balls. The adaptive section provides periodic working resistance to absorb and release energy and adapts to large deformations by continuously cutting gears with bearing balls. The working principle of the adaptive section was theoretically and experimentally analyzed. Its shear performance was compared to that of an ordinary cable under cyclic shear tests. The results indicated that: the ordinary cables broke after the first shear test; however, the new anchor cables still had high support after four shear tests (cumulative displacement: 0.8 m). Compared with ordinary cables, the new anchor cables experienced lower shear force, and provided higher working resistance with large shear displacement, because of the more uniform stress of the new anchor cable; energy was released in time under the action of the hinge connections and adaptive section.



中文翻译:

新型弹性锚索的研制及其大剪切变形性能

滑坡的连续阶梯形变广泛发生在季节性降雨和水库运行期间。因此,重要的是开发弹性稳定结构以确保即使在发生大变形时它们也能继续发挥作用。在这项研究中,提出了一种具有高支撑和大剪切变形的新型锚索。锚索主要由自由段、灌浆段和适应段组成,它们之间采用铰链连接。自适应部分由带多个梯形齿轮的锚、套管、连杆和轴承滚珠组成。自适应部分提供周期性工作阻力以吸收和释放能量,并通过连续切割带有轴承滚珠的齿轮来适应大变形。从理论上和实验上分析了自适应部分的工作原理。在循环剪切试验下,其剪切性能与普通电缆的剪切性能进行了比较。结果表明:普通电缆在第一次剪切试验后断裂;然而,经过四次剪切试验(累积位移:0.8 m)后,新锚索仍然具有较高的支撑力。与普通锚索相比,新型锚索受力更小,剪切位移更大,工作阻力更高,受力更均匀;能量在铰链连接和适配段的作用下及时释放。然而,经过四次剪切试验(累积位移:0.8 m)后,新锚索仍然具有较高的支撑力。与普通锚索相比,新型锚索受力更小,剪切位移更大,工作阻力更高,受力更均匀;能量在铰链连接和适配段的作用下及时释放。然而,经过四次剪切试验(累积位移:0.8 m)后,新锚索仍然具有较高的支撑力。与普通锚索相比,新型锚索受力更小,剪切位移更大,工作阻力更高,受力更均匀;能量在铰链连接和适配段的作用下及时释放。

更新日期:2023-01-26
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