CN201137143Y

CN201137143Y - Breaking-resistant prestressed anchor rod tray

Info

Publication number: CN201137143Y
Application number: CNU2007203090429U
Authority: CN
Inventors: 邵培森
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-24
Filing date: 2007-12-24
Publication date: 2008-10-22
Anticipated expiration: 2017-12-24

Abstract

Presently, most fracture positions of anchor rods which are applied in prestressed high insensitive anchor rod supporting engineering are generated at tail thread of the anchor rods, and the fracture mode is caused by co-action of pull, bend and twist. The main reason causing fracture of anchor rods is that structure of anchor plates has a plurality of critical defects which cause fracture of anchor rods in a certain mounting conditions. The utility model aims at providing a prestressed anchor plate capable of resisting fracture, when stressing a pretightening force against an anchor rod, relative rotation of a cushion spherical pair and relative sliding between a flat cushion and a convex ball cushion can prevent the anchor rod from generating flexural moment to obtain optimum stress, thereby furthest achieving anchoring effect and effectively increasing bearing capacity of the anchor rod.

Description

Resisting Break Prestress Anchor Tray

One, technical field

The utility model relates to a kind of Resisting Break Prestress Anchor Tray, and it belongs to the bolt support technology field.

Two, background technology

Stress as anchor pole the best should be simple tension, could bring into play the anchoring efficient of anchor pole most effectively like this, if having the masterpiece of other directions to be used for anchor pole simultaneously then will greatly weaken the supporting capacity even the fracture of anchor pole.The phenomenon of anchor pole fracture takes place in bolt support often, the phenomenon that the anchor pole fracture especially takes place in the supporting process of high-strength prestress anchor pole is more apparent outstanding, the anchor pole that fracture takes place from the scene is observed, anchor pole fracture location major part existing and that be applied in the prestressed high strength bolt support engineering occurs in the tailing screw flight place, its fracture mode is that stretch bending is turned round symphyogenetic result, and main cause is because the crag injustice, the axis of the part of anchor pole outside the hole will move to the normal direction of rock wall surface when applying pretightning force, when a bit with after the EDGE CONTACT in hole just having obtained a fulcrum on the anchor pole, continue to apply pretightning force again, its radial component makes anchor pole and fulcrum generation moment of flexure cause the anchor pole bending until fractureing.Causing the anchor pole major cause of failure is that the structure of pallet exists many fatal defectives, will cause the fracture of anchor pole under certain mounting condition.

Three, summary of the invention

For solving the problem that the defective that exists because of support holder structure existing and that use causes the anchor pole fracture, the utility model provides a kind of Resisting Break Prestress Anchor Tray, it can make anchor pole bring into play anchoring efficient to greatest extent in supporting, increases the supporting capacity of anchor pole effectively.

The technical solution adopted in the utility model is: a kind of Resisting Break Prestress Anchor Tray comprises: spill ball pad, convex ball pad, plain cushion, pallet, anchor pole, W steel band etc., it is characterized in that: convex ball pad is sphere with spill ball pad and cooperates, its centre of gyration is positioned at outside W steel band and the pallet noncontact face and on the axis of anchor pole, convex ball pad is that a spheroid is established centre bore, plane one end and plain cushion one end face are slidingly matched, the other end of plain cushion is connected with an end face of pallet, the other end of pallet is connected with the W steel band, and the normal plane by the centre of gyration and anchor pole axis and the minimum angle of ball pad spherical pair cooperation place are greater than the angle of friction between the ball pad spherical pair.The radial component that in applying the pretightning force process, is produced can promote ball pad parafacies to rotate and convex ball pad and plain cushion between relative slip make the anchor pole can flexural deformation and fracture.

The beneficial effects of the utility model are: when anchor pole is applied pretightning force the pad spherical pair relatively rotate and plain cushion and relative slip between the convex ball pad can make anchor pole not produce moment of flexure to obtain best stressed, bring into play anchoring efficient to greatest extent, increase the supporting capacity of anchor pole effectively.

Four, description of drawings

Be structure chart of the present utility model

Five, the specific embodiment

As shown in drawings, a kind of Resisting Break Prestress Anchor Tray comprises: spill ball pad (1), convex ball pad (2), plain cushion (3), pallet (4), anchor pole (5), W steel band (6) etc., it is characterized in that: convex ball pad (2) is sphere with spill ball pad (1) and cooperates, its centre of gyration O is positioned at outside W steel band (6) and pallet (4) the noncontact face and on the axis of anchor pole (5), convex ball pad (2) is that a spheroid is established centre bore, plane one end and plain cushion (3) one end faces are slidingly matched, the other end of plain cushion (3) is connected with an end face of pallet (4), the other end of pallet (4) is connected with W steel band (6), spill ball pad (1) is the cylinder of a band centre bore, one end is isometrical cooperation of sphere of spill sphere and convex ball pad (2), the other end is the plane, and the normal plane by spherical pair centre of gyration O and anchor pole (5) axis and the minimum angle theta of spherical pair cooperation place are greater than the angle of friction between the ball pad spherical pair.

Claims

1, a kind of Resisting Break Prestress Anchor Tray comprises: spill ball pad, convex ball pad, plain cushion, pallet, anchor pole, W steel band etc., it is characterized in that: convex ball pad is sphere with spill ball pad and cooperates, its centre of gyration O is positioned at outside W steel band and the pallet noncontact face and on the axis of anchor pole, convex ball pad is that a spheroid is established centre bore, and plane one end and plain cushion one end face are slidingly matched.

2, a kind of Resisting Break Prestress Anchor Tray according to claim 1 is characterized in that: spill ball pad is the cylinder of a band centre bore, and an end is isometrical cooperation of sphere of spill sphere and convex ball pad, and the other end is the plane.

3, a kind of Resisting Break Prestress Anchor Tray according to claim 1 is characterized in that: the normal plane by spherical pair centre of gyration O and anchor pole axis and the minimum angle theta of spherical pair cooperation place are greater than the angle of friction between the ball pad spherical pair.