预应力锚索锚固效应的三维数值模拟及其工程应用研究

预应力锚固技术在岩土加固的各个领域中得到了广泛的应用,但是关于其锚固机理的研究仍处于探索阶段。本文采用快速拉格朗日分析法(FLAC3D)对预应力单、群锚体系作用下锚固段、自由段以及锚头部位的受力、变形和破坏机理进行了三维数值模拟分析,探讨了影响锚固段剪应力分布的一些因素,在此基础上得出了一些有益的结论,可为预应力锚固的工程设计和理论研究提供参考。最后,将其应用到工程实践中,证明了其有效性。 

3D NUMERICAL SIMULATION OF THE ANCHOR EFFECT OF PRESTRESSED CABLES AND ITS ENGINEERING APPLICATION

Prestressed cable anchor technology has been widely used in many fields of geotechnical reinforcement engineering.However,the research on the reinforcement mechanism of prestressed anchorage is still at an exploratory stage.Based on the fast Lagrangian analysis method(FLAC-3D),the stress,deformation and failure mechanisms of the anchorage segment,free segment and anchor pier under the effect of the single or multi-cable anchor system have been analyzed through 3D numerical modeling and some influence factors of shear stress distribution along the anchorage segment have also been discussed.On that basis,some useful conclusions are drawn,which can provide a reference for the engineering design and theoretical study.These research results prove to be effective through engineering practice.