一种用于应急抢险的自承载式预应力锚索  

A self-load bearing type anchor

作　　者：王全成[1] 姜昭群[1] 杨栋[1] 张勇[1] 罗宏保[1] 

机构地区：[1]中国地质调查局地质灾害防治技术中心,中国地质科学院探矿工艺研究所,成都611734

出　　处：《兰州大学学报（自然科学版）》2015年第6期855-858,864,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：中国地质调查局项目(12120114094801);国土资源公益性行业专项(201511051)

摘　　要：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-load bearing type anchor was presented, which possesses stretch locking without grouting. Tension construction, whose anchorage is 50%-100% of the design strength, can be started immediately after a drilling is completed. Grouting is constructed after the-initial tensioning. The second tensioning construction can be carried out to meet the designed anchorage when slurry meets the strength requirements. This anchor is a pulling-pressing compound-type, taking advantage of the reserved free section. The significance of the self-load bearing type anchor, its structure and mechanism, and the experimental study were introduced in detail. The results showed that it is a reasonable anchor system which can make quick anchoring possible through a reduction of the mortar strength request during the second tension, characterized by its stress distribution. The self-load bearing type anchor has good application prospects in the rapid construction of anchoring engineering.

关 键 词：自承载式 预应力锚索 快速锚固 施工工艺 

分 类 号：P642.23[天文地球—工程地质学]