Anti-floating anchors have been widely used in China. In the design practice of anti-floating anchors,the design parameters recommended by several current standards change largely without considering the differential mechanical properties of rocks in different areas. On the project of the Great Theatre of Qingdao,the destructive pull-out tests on anti-floating anchors equipped with strain gauges were carried out. The distribution of axial force along the length of anchor and the shear stress between the grout and anchor rod were obtained. The test results indicate that the internal force distribution is not uniform,and no force exists after a certain length. The ultimate pullout resistance and the effective anchorage length of the anti-floating anchors were determined,which may be taken as reference for the design and construction of anti-floating anchors.
Chinese Journal of Rock Mechanics and Engineering
moderately weathered granite