非金属锚杆界面粘结强度试验研究

为解决岩土锚固工程中钢锚杆的腐蚀问题,自20世纪90年代起,国外开始采用纤维塑料筋这种非金属锚杆来替代传统的钢锚杆。纤维塑料筋具有抗拉强度高、抗腐蚀性能优良、容重小、热膨胀系数与混凝土和水泥砂浆相似等优点。在国内首次开展了纤维塑料筋锚杆的试验研究,基于63个试件的拔出试验,对纤维塑料筋锚杆与多种环境介质之间的界面粘结强度进行较为系统的研究,研究表明,纤维塑料筋锚杆具有较高的界面粘结强度。这一结论可为纤维塑料筋锚杆在岩土锚固工程中的应用提供依据和参考。

Experimental studies on interface bond strength of non-metallic anchors

In order to avoid the corrosion of steel anchors in ground engineering, since 1990, FRP anchors, a non-metallic anchors, are used abroad to substitute for the traditional steel anchors. FRP anchors have the characteristics of higher tensile strength, better antisepsis, light weight, heat expansion coefficient near to concrete and mortar, et al. It is the first time that FRP anchors are tested in China. Based on pull-out tests of 63 specimens, interface bond strength between FRP anchors and different media are systematically studied, and the results show that FRP anchors have higher interface bond strength. This conclusion can provide verifications and references for the application of FRP anchors in ground engineering.