| 摘要 |
<p>Disclosed are a scissor-type expansion bolt and the use thereof. The scissor-type expansion bolt comprises a lug nut seat (4) to the top part of which is hinged an expansion plate (1), and a bolt stem (5) matching the lug nut seat (4), and a top end part of the bolt stem (5) is a curved surface (2) or a hemispherical head (2). The curved surface (2) or the hemispherical head (2) of the top end part of the bolt stem (5) is in contact with an inner edge and corner of an inclined surface of a lower end part of the expansion plate (1), and turning the bolt stem (5) can make same directly and continuously push the expansion bolt (1) outwardly along the inner edge and corner of the inclined surface of the lower end part of the expansion plate (1) to carry out a scissor-type opening action, and a supporting plate (7) and a nut (9) mating therewith are sheathed on the lower end of the bolt stem (5). The scissor-type expansion bolt is used for anchoring, reinforcing or securing an unstable layer in engineering such as of tunnels, revetments, foundation pits, dams, and mining.</p> |
