CN2451634Y

CN2451634Y - Expansion anchor

Info

Publication number: CN2451634Y
Application number: CN 00246099
Authority: CN
Inventors: 王国体; 潘恒芳; 王婉娣
Original assignee: Hefei University of Technology
Current assignee: Hefei University of Technology
Priority date: 2000-08-09
Filing date: 2000-08-09
Publication date: 2001-10-03
Anticipated expiration: 2010-08-09

Abstract

The utility model relates to an expansion anchor used for an earth body in rock earth engineering. The expansion anchor used for an earth body in rock earth engineering is composed of an anchor head, an anchor rod, a reverse hook, etc. A lower expansion branch is movably connected with the tail of the anchor head. An upper controller and a lower controller are connected to the anchor rod by threads. An upper connector which slides and is movably connected with an upper expansion branch of the reverse hook is arranged between the upper controller and the lower controller. A connector which can lengthen the anchor rod is arranged on the tail of the anchor rod. The upper expansion branch and the lower expansion branch are movably connected. The structural type is suitable for advanced mechanical hole forming. The expansion anchor used for an earth body in rock earth engineering is also provided with a structural type which is suitable for manual screwing in. The difference of the structural type and the structural type which is suitable for manual screwing exist in that the anchor head is a spiral conical type, the upper connector and the upper controller are movably connected by concave and convex square conical tables which are in sliding fit. The xpansion anchor used for an earth body in rock earth engineering has strong anti-drawing force.

Description

Expansible anchor

The utility model relates in a kind of geotechnical engineering, particularly is in the building, water conservancy, traffic engineering of working background with the soil body or the anchor device of anti-pulling ability is provided in the engineering test.

Pattern foundation pit supporting structure in existing civil engineering, the landslide control in the hydraulic engineering, the support engineering in the traffic engineering, and measures such as many employing piling, anchor pole, retaining wall, sheet pile wall, soil nailing wall, antislide pile, antiskid rigid frame, uplift pile, Screw Anchor in the engineering test.The shortcoming of these measures is that the tension pull out force is little, and investment is big, and the construction period is long, and is can only take stopgap measures and can not effect a permanent cure.

The purpose of this utility model provides a kind of geotechnical engineering that is used for, and can enlarge the expansible anchor that contacts, produces big tension pull out force with the soil body.

The utility model has adopted following technical scheme in order to realize purpose.

The technical solution of the utility model is that basic structures such as the anchor head of existing anchor, anchor pole, barb are made a big improvement.At use two kinds of patterns are arranged, the structure of these two kinds of patterns is basic identical, and difference is arranged slightly.

1. for being used for the soil body of mechanical hole building in advance, its structural shape is: with the anchor head afterbody of anchor pole one lower connector is arranged, be connected with down the branch that expands on the lower connector.

The following controller that is threaded is arranged on the anchor pole, have slidably and have going up of barb to expand a last connector that branch flexibly connects, the last controller that is threaded is arranged, the afterbody connector that extends in addition.Barb is at the end of the last branch that expands.

Last expansion branch flexibly connects with the branch that expands down.

2. for being used for manually screwing in the soil body, its structural shape is that with the difference that is used for the mechanical hole building pattern anchor head is the spiral bevel-type.Last connector and last controller are that the concavo-convex square frustum formula that is slidingly matched flexibly connects.

The flexible connection point of go up to expand branch and the branch that expands down of barb last expand branch and following expansion separately length 1/2 between the distance free end 1/3.

Last cross section of expanding branch is a trapezoid, and following cross section of expanding branch is trapezoidal.The barb cross section is triangular in shape.Expand up and down branch and anchor pole symmetric arrangement, 4-8 is right.

Last lower connector is horizontal annular sector with the position that the branch that expands up and down flexibly connects, and is connected by bolt.

The utility model has the advantages that simple in structure, small investment, instant effect.For the mechanical hole building of the soil body, it to be imbedded, post-tensioning is opened; Screw in artificial for the soil body, post-tensioning is opened, and is easy to use, and the anti-pulling effect is obvious.Can be widely used in pattern foundation pit supporting structure, landslide control, support engineering and the engineering test.

Below in conjunction with Figure of description and embodiment the utility model is described in detail.

Fig. 1 is the structural shape schematic diagram that the utility model is used for the mechanical hole building soil body.

Fig. 2 is the structural shape schematic diagram that the utility model is used for manually screwing in the soil body.

Fig. 3 is the 4 symmetrical syndeton schematic diagrames of branch and lower connector of expanding under the utility model.

Fig. 4 is the 8 symmetrical syndeton schematic diagrames of branch and lower connector of expanding under the utility model.

Fig. 5 is the schematic diagram in the utility model barb and last expansion branch cross section.

The utility model is to be made of anchor head 12, anchor pole 7, barb 10 etc. as depicted in figs. 1 and 2.With the afterbody of the anchor head 12 of anchor pole 7 one, the lower connector 1 that can flexibly connect the branch 2 that expands is down arranged.On the anchor pole 7 screw thread is arranged, the following controller 11 that is threaded is with it arranged, the slide connector 4 with anchor pole 7 slip suits is arranged above the following controller 11, flexibly connect the branch 3 that expands of going up of barb 10 on the slide connector 4.Last expansion branch 3 also flexibly connects with the branch 2 that expands down.A last controller 5 that is threaded with anchor pole 7 is arranged above the slide connector 4.Controller 5 and 1 is used to control branch 3 and 2 sizes of opening that expand up and down up and down.Anchor pole 7 afterbodys also have a lengthening connector 6 that is used for anchor pole 7 lengthenings.Barb 10 is at the end of the last branch 3 that expands.

The position of the flexible connection point 9 of going up the branch 3 that expands of the following barb that expands branch 2 and flexibly connect with slide connector 4 that flexibly connects with the lower connector 1 of anchor head 12 afterbodys is at the last branch 3 and branch 2 1/2 place of length extremely between free-ended 1/3 place of distance separately of expanding down of expanding.The cross section of expansion branch 3 and 2 is trapezoids and trapezoidal up and down, and the cross section of barb 10 is triangular in shape, as shown in Figure 5.Last lower connector 4 and 1 and the positions that flexibly connect of the branch 3 and 2 that expands up and down be horizontal annular sector, connect by bolt 8, expand up and down branch 3 and 2 and anchor pole 7 symmetric arrangement, 4 to 8 pairs, as shown in Figure 3 and Figure 4.

The difference of Fig. 1 and Fig. 2 is, the anchor head 12 among Fig. 2 is spiral bevel-types, and last connector 4 is that the concavo-convex square frustum formula that is slidingly matched flexibly connects with last controller 5.

In construction, when in advance with the soil body mechanical hole building, available first kind of structural shape of the present utility model as shown in Figure 1.Adjust down controller 11 in advance to appropriate position, and adjust and go up controller 5 branch 3 and 2 that expands is up and down packed up.Expansible anchor is inserted in the hole, and the branch 3 and 2 that then expands is up and down opened under the deadweight effect automatically, inserts Shamian Island, the anchor pole 7 of pulling back, and barb 10 just can hook the soil body.If anchor pole 7 falls short of, then can be by lengthening connector 6 lengthening anchor poles 7.

In construction, when failing in advance with soil body pore-forming, available second kind of structural shape of the present utility model as shown in Figure 2.To descend controller 11 to be adjusted to appropriate position in advance, the branch 3 and 2 that will expand is up and down again packed up.Be available specialized barrel pincers, entangle lengthening connector 6, rotate expansible anchor, spiral awl anchor head 12 just can screw in the soil body at an easy rate.Because last connector 4 and last controller 5 are concavo-convex side's frustum formulas being connected of being slidingly matched, following flexible connection of expanding branch 2 and lower connector 1 is axial, and therefore in the process of the screw-in soil body, the branch of packing up of expansion up and down 3 and 2 can not have obstruction because of screw-in.When expansible anchor screw-in projected depth, the anchor pole 7 of pulling back then, release expansion branch 3 and 2 get final product.

Claims

1, a kind of expansible anchor that the tension pull out force is provided that is used for the soil body has anchor head, anchor pole and barb to constitute, and it is characterized in that:

With anchor head (12) afterbody of anchor pole (7) one lower connector (1) is arranged, be connected with down the branch (2) that expands on the lower connector (1);

The following controller (11) that is threaded is arranged on the anchor pole (7), have slidably and have going up of barb (10) to expand a last connector (4) that branch (3) flexibly connects, the last controller (5) that is threaded is arranged, the afterbody connector (6) that extends in addition; Barb (10) is at last expansion branch (3) end;

Last expansion branch (3) flexibly connects with the branch (2) that expands down.

2, by the described expansible anchor of claim 1, it is characterized in that anchor head (12) also can be the spiral bevel-type; Last connector (4) is that the concavo-convex square frustum formula that is slidingly matched flexibly connects with last controller (5).

3, by claim 1 or 2 described expansible anchors, it is characterized in that, the going up of barb (10) expand branch (3) and the branch (2) that expands down flexible connection point (9) last expand branch (3) and following expansion (2) separately length 1/2 between the distance free end 1/3.

By claim 1 or 2 described expansible anchors, it is characterized in that 4, last cross section of expanding branch (3) is a trapezoid, following cross section of expanding branch (2) is trapezoidal; Barb (10) cross section is triangular in shape; Expansion (3 and 2) and anchor pole (7) symmetric arrangement up and down, 4-8 is right.

5,, it is characterized in that lower connector (4 and 1) and the position that the branch (3 and 2) that expands up and down flexibly connects are horizontal annular sector by claim 1 or 2 described expansible anchors; Connect by bolt (8).