川藏公路滑坡加固预应力锚索受力分析研究

Stress Analysis on Prestress Anchoring Rope Reinforcing Landslide Along Sichuan-Tibet Highway

以川藏公路102滑坡群滑坡处理为依托,仔细研究了滑坡体的工程地质特征。对由大型松散堆积物形成的2#滑坡锚索加固工程稳定性进行了研究,由于在2#滑坡中,滑动面和预应力锚索之间的夹角很大,作用在锚索上面的力还包括轴向拉力和侧向的弯矩和剪力。通过对力的分析和计算证明,使用梁单元来进行计算更加符合实际使用要求,因此,预应力锚索的应用不仅能够合理地改善结构的受力条件,并且能够充分地利用材料本身的强度特性,节约了工程的使用费用,具有很好的推广应用价值。

Based on the treatment of 102 landslides on Sichuan-Tibet highway,a study on engineering geological characteristics of these landslides is done. Research on the stability of 2#landslide anchor rope reinforce project which formed by large scale loose deposits,prestress anchoring ropes inside 2#landslide are large angle intersection with sliding surface,thus,the force acting on anchor rope include axial tensile and lateral shearing force as well as bending moment. Based on analysis and calculation of force,it is proved that using beam element to calculate is more in line with actual situation,so the application of prestress anchoring rope not only can improve structure force condition reasonably,but also make full use of material strength and save project costs,therefore,this method is of good promotional value.