论文部分内容阅读
提出一种不需要注浆即可进行张拉锁定的自承载式预应力锚索,在钻孔完成下入自承载式预应力锚索后即可进行张拉施工,初始锁定锚固力可达设计锚固力的50%~100%,初始张拉后,进行注浆施工,浆体达到强度要求后,可进行二次张拉,按照设计锚固力进行锁定,利用预留的自由段,形成拉压复合型预应力锚索.对自承载式预应力锚索的意义、结构及作用机理、试验研究等做了详细的介绍,系统结构合理,应力分布均匀,初始张拉后,降低了二次张拉对砂浆体强度的要求,使快速锚固成为可能,在锚固工程的快速施工中具有较好的应用前景.
A self-bearing prestressed anchor cable which can be used for tension locking without grouting is proposed. After self-bearing prestressed anchor cable is completed, tensioning can be carried out. The initial anchoring force can reach the design 50% ~ 100% of the anchoring force. After the initial tensioning, grouting construction is performed. After the slurry reaches the strength requirement, it can be tensioned twice and locked according to the design anchoring force. The tension section Composite prestressed anchor cable.It introduces the meaning, structure, mechanism and experiment of self-supporting prestressed anchor cable in detail. The system structure is reasonable and the stress distribution is uniform. After the initial tensioning, the secondary tension is reduced Pulling on the requirement of mortar strength makes the rapid anchoring possible and has a good application prospect in the rapid construction of anchoring projects.