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( 2 ) Expanded shell anchors.
( 3 ) The inverted wedge type money pole.
( 4 ) The resin is wrongly anchored.
(5 ) Cement roll anchor drill pipe.
(6 ) Explosive point anchor anchor.
(7 ) Allowable anchors.
The second category: full-length bonded anchor cup (8 ) cement mortar anchor.
(9 ) Hole tube mortar anchor ( *+,-. method).
(10 ) Resin-bonded anchors.
The third category: friction full-length anchor bolt
(11) Pipe joint (slotted) type anchor.
(12) Expanded anchor (Sweden).
(13) Elliptical tubular anchor (Bulgaria).
(14) Explosive friction anchor (USSR).
(15) Mechanical rack type friction anchor (USA).
(16) Compressed wood anchors.
(17) Auger anchor (USSR).
(18) Hydraulically pressed anchors (USA).
The fourth category: integrated anchor
(19) Bridge anchors.
(20) Mortar wedge joint anchor (Sweden).
(21) Prestressed grouting anchors.
(22) Pipe wedge anchor.
Considering the anchoring characteristics, the current anchors can be grouped into 22 categories in four categories , as follows:
The first category: Point-type anchor ( 1 ) Wedge-type anchor.