| 摘要 |
In rock anchors, in particular combined rigid profile and extension anchors, the anchor rod (1), except for the anchor tip (2), is surrounded by an envelope tube (3), and its end projecting from the mouth of the drilled hole is designed so that it can be restrained relative to the rock by means of an anchor plate and a screw connection. In order to guarantee the immediate bearing capacity of an anchor of this type, in particular in the filling-mortar method, at least one section (5) of the envelope tube (3) is provided with recesses (7) as an expanding element, which recesses (7) are distributed over the periphery and the length and are integrated in slots (8), and the anchor tip (2) is designed as an abutment. …<IMAGE>… |
