Pawl type self-locking anchor bar, chorda
A self-locking bolt and pawl technology, applied in the installation of bolts, sheet pile walls, mining equipment, etc., can solve the problems of low tensile strength and complex installation process, and achieve the effect of increasing the anchoring force
Inactive Publication Date: 2008-08-27
KUNMING UNIV OF SCI & TECH
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Problems solved by technology
For the provision of initial anchoring force, under the condition of the first method, the pullout strength provided by the friction between the anchor head and the rock mass is small due to the short anchorage section; under the condition of the second method, due to the The rod sections are in close contact with the rock mass, and the friction between the rod body and the rock mass can provide a greater pull-out strength (bonded bolts need a certain period of time to reach the corresponding strength), but no matter which is representative The installation process is more complicated, especially in the case of upward anchoring, most of which require special installation equipment
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[0010] Such as figure 1 , 2 As shown, a plurality of pawl blocks 3 or 4 form a pawl group by being installed on the pawl block fixing ring 12 (for ease of assembly, a split fixing ring can be used to pack the pawl blocks from the opening of the ring), The number of ratchet blocks contained in a ratchet group is not less than 3, and the specific value depends on the size of the installation space on the ring and the hardness and strength of the ratchet block material and the anchored material (such as rock mass, etc.), if the hardness and strength High, the number can be small, otherwise the number can be more; then the pawl group is embedded in the annular groove 11 on the collar 1, and more than two pawl groups can be installed on one collar 1, and the number depends on the anchorage. In general, when the integrity of the anchored body is good, the number can be small, otherwise the number can be large; the length of the collar 1 can be the entire length of the anchor rod, o...
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The invention discloses a pawl-type self-locking anchor and a cable. The invention relates to a component device of an anchor, in particular to a pawls-type self-locking anchor solid component device, which belongs to the project field of geotechnical, wherein a lantern ring is fixed on an anchor body, the outer wall of the lantern ring is hinged with a series of pawl blocks, the pawl blocks are located in a pawl slot on the lantern ring and are equipped with a spring which is outward pushed, and a protective cased pipe is sleeved outside the lantern ring in the initial status of installment. As the unidirectional constraint working principle of a pawl mechanism, the installment of the anchor is very convenient, when an anchorage body produces deformation or has a deformation trend at an axial direction, the frictional resistance between the anchor and the wall of an anchor eye of the anchorage body is increased, thereby increasing an anchorage force, and the pawl-type self-locking anchor and a cable is particularly suitable for anchoring of hard rock.
Description
technical field [0001] The invention relates to an assembly device of an anchor rod, in particular to a pawl type self-locking anchor assembly device, which belongs to the field of geotechnical engineering. Background technique [0002] In rock mass anchoring technology, bolts can provide axial and radial restraint for rock mass deformation. Existing rock bolts are mainly divided into two categories: one is anchoring bolts near the bottom of the hole, and the other is anchoring bolts with the whole body. For the provision of initial anchoring force, under the condition of the first method, the pullout strength provided by the friction between the anchor head and the rock mass is small due to the short anchorage section; under the condition of the second method, due to the The rod sections are in close contact with the rock mass, and the friction between the rod body and the rock mass can provide a greater pull-out strength (bonded bolts need a certain period of time to reac...
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IPC IPC(8): E02D5/74E21D21/00
Inventor 李心一戴晓江李昱东
Owner KUNMING UNIV OF SCI & TECH