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为了研究预紧力锚杆作用下锚固体内所产生的协同锚固效应现象,在实验室条件下制作一组模型试件。通过给锚杆施加不同预紧力,测试分析锚固体内不同测点所产生的应力值及应力场分布特征,证明协同锚固效应在锚固体内是客观存在的,并提出协同指数的概念和计算公式,以此建立协同效应的评价方法。研究表明,锚固体内协同锚固效应分布范围呈椭圆球形,且随着预紧力增大而增大。由此得知,锚杆预紧力对增强锚固体内协同锚固作用及协同锚固效应范围,提高其强度和刚度具有重要作用。
In order to study the synergistic anchoring effect produced by anchors under the prestressing anchor, a series of model specimens were made under laboratory conditions. By applying different pretightening forces to the anchor rod, stress and stress field distribution characteristics of different anchors in the anchorage are tested and analyzed. It is proved that the synergistic anchoring effect exists objectively in the anchoring body and the concept and formula of the synergistic index are proposed. In order to establish synergies evaluation method. The research shows that the distribution range of the cooperative anchoring effect in the anchoring body is oval spherical, and increases with the increase of the pretension force. It can be seen from this that the pre-tightening force of anchor rod plays an important role in enhancing the synergistic anchoring effect and the scope of synergistic anchoring effect and enhancing the strength and stiffness of the anchor.