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施加在锚索上的荷载可由锚固段的顶端向下(拉力型)或由下向上(压力型)传递,这取决于锚索在锚固段内的锚固方式。通过试验,比较了传统的拉力型及压力型两种锚固方式,并提出一种新的介于二者之间的锚固方式,称为复合型。其目的是使锚固段上的应力分布趋于均匀,避免或减少灌浆体的拉伸裂缝,从而增加锚固效果及防腐系统的可靠性。同时,对岩锚锚固体系提出设计建议,以提高预应力锚索的锚固性能并尽可能方便施工,降低成本。
The load exerted on the cable can be transmitted either from the top of the anchoring section down (tension type) or from up to down (pressure type), depending on the anchoring of the cable in the anchoring section. Through the experiment, the traditional tensile and pressure type anchoring methods are compared, and a new anchoring method between the two is proposed, which is called compound type. The purpose is to make the stress distribution on the anchor section to be uniform and to avoid or reduce the tensile cracks of the grouting body so as to increase the anchoring effect and the reliability of the anti-corrosion system. At the same time, the design proposal of rock anchor anchoring system is proposed to improve the anchorage performance of prestressed anchorage cable and to facilitate the construction as much as possible and reduce the cost.