CN203530977U - Rock pre-stressed expansion anchor rod - Google Patents

Rock pre-stressed expansion anchor rod Download PDF

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Publication number
CN203530977U
CN203530977U CN201320672212.5U CN201320672212U CN203530977U CN 203530977 U CN203530977 U CN 203530977U CN 201320672212 U CN201320672212 U CN 201320672212U CN 203530977 U CN203530977 U CN 203530977U
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CN
China
Prior art keywords
anchor
expansion
anchor bolt
expansion piece
chock
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Expired - Fee Related
Application number
CN201320672212.5U
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Chinese (zh)
Inventor
郭丙善
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Guo Bingshan
Wang Yaobo
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Individual
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Priority to CN201320672212.5U priority Critical patent/CN203530977U/en
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Publication of CN203530977U publication Critical patent/CN203530977U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides a rock pre-stressed expansion anchor rod and relates to the anchor rod field. The rock pre-stressed expansion anchor rod comprises an anchor bolt, an anchor nut and an expansion portion, wherein the anchor nut is connected with one end of the anchor bolt through a thread; the expansion portion comprises a wedge and an expansion part, wherein the wedge is sleeved on the anchor bolt and abuts against the anchor nut; the lateral portion of the wedge far away from the anchor bolt has an inclined surface facing towards the side far away from the anchor nut, and the expansion part has a plane which is attached to the inclined surface. When the expansion part and the wedge produce relative movement along the inclined surface, the distance between the side of the expansion part far away from the anchor bolt and the anchor bolt is larger than that between the wedge and the anchor bolt. By means of the rock pre-stressed expansion anchor rod, friction between the rock pre-stressed expansion anchor rod and the wall of an anchor hole is increased, load-bearing capability is improved, and requirements of complex rock joint foundations and concrete foundations bearing large dynamic load can be met.

Description

A kind of rock prestressing force expansion anchor rod
Technical field
The utility model relates to anchor pole field, in particular to a kind of rock prestressing force expansion anchor rod.
Background technology
In correlation technique, at engineering construction field, in order to improve concrete foundation resistance to plucking supporting capacity, conventionally on rock foundation, get out perfectly straight circular hole, then straight anchor pole is put into the center of circular hole, and the gap between anchor pole and hole wall is filled with to real with concrete or grouting material, thereby together with the concrete foundation on top being anchored at rock mass subgrade by anchor pole.Anchor pole resistance to plucking supporting capacity mainly relies on the frictional force between anchoring pile and hole wall to provide.
But, the concrete foundation of bearing larger dynamic load for complex formation joint ground or top, the anchor pole of said structure, exists degree of safety not enough and under dynamic loading, occur the danger of fatigue failure, and supporting capacity can not meet the demands.
Utility model content
The purpose of this utility model is to provide a kind of rock prestressing force expansion anchor rod, to solve the above problems.
A kind of rock prestressing force expansion anchor rod is provided in embodiment of the present utility model, has comprised: anchor bolt, anchoring nut and bulge; One end of described anchoring nut and described anchor bolt is threaded connection; Described bulge comprises chock and expansion piece, and described chock is enclosed within outside described anchor bolt and offsets with described anchoring nut; Described chock exists towards the inclined-plane of the side away from described anchoring nut away from the sidepiece of described anchor bolt, has a plane on described expansion piece, described plane and the laminating of described inclined-plane;
When described expansion piece and described chock produce relative motion along described inclined-plane, described expansion piece can be greater than described chock apart from the distance of described anchor bolt away from a side of described anchor bolt apart from the distance of described anchor bolt.
A kind of rock prestressing force expansion anchor rod that the utility model embodiment provides, compare with straight anchor pole of the prior art, it is not only strutted by chock by expansion piece, with between anchor hole wall, contact, make to there is maximum frictional force between anchor pole and anchor hole wall, also by between chock and expansion piece with plane contact, when being applied with force pulling, between chock and expansion piece, contact closely, make to reach between chock and expansion piece maximum frictional force, under the effect of two kinds of power of the frictional force between above-mentioned expansion piece and anchor hole wall and the frictional force between expansion joint and chock, the rock prestressing force expansion anchor rod that the utility model provides improved and anchor hole wall between frictional force, increased supporting capacity, the concrete foundation of bearing larger dynamic load for complex formation joint ground or top, can meet the demands.
Accompanying drawing explanation
Fig. 1 shows the elevation of the rock prestressing force expansion anchor rod that the utility model embodiment provides;
Fig. 2 shows the top view of the rock prestressing force expansion anchor rod that the utility model embodiment provides.
In figure, the implication of each symbol is as follows:
1 anchor bolt, 2 chocks, 3 expansion pieces, 4 anchoring nuts, 5 spaces.
The specific embodiment
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
Referring to Fig. 1, a kind of rock prestressing force expansion anchor rod that the utility model embodiment provides, the Fig. 1 of take describes as main, also can, referring to Fig. 2, comprise: anchor bolt 1, anchoring nut 4 and bulge; Anchoring nut 4 is threaded connection with one end of anchor bolt 1; Bulge comprises chock 2 and expansion piece 3, and chock 2 is enclosed within outside anchor bolt 1 and offsets with anchoring nut 4; Chock 2 exists towards the inclined-plane of the side away from anchoring nut 4 away from the sidepiece of anchor bolt 1, has a plane on expansion piece 3, plane and inclined-plane laminating;
When expansion piece 3 produces relative motion with chock 2 along inclined-plane, expansion piece 3 can be greater than chock 2 apart from the distance of anchor bolt 1 away from a side of anchor bolt 1 apart from the distance of anchor bolt 1.
The rock prestressing force expansion anchor rod that the utility model embodiment provides adopts metal material to make, as iron, in work progress, after being assembled, prestressing force expansion anchor rod puts into the slightly large anchor hole in aperture, when anchor bolt is applied with to force pulling, anchor bolt can move up, chock can move up together with anchor bolt, along with chock moves on constantly, extruding force between chock and expansion piece contact surface increases gradually, expansion piece is softened gradually, contact with anchor hole wall, when upper force pulling increases to after certain value, frictional force between chock and expansion piece reaches maximum value, chock moves on can not continuing again, frictional force between expansion piece and anchor hole wall also reaches maximum value, expansion piece can not be softened again, in anchor hole, pour into pea gravel concreten or mortar, complete anchoring.
In addition, in order further to improve the supporting capacity of anchoring, when the utility model embodiment bores bolthole on rock, also within the scope of the 300-500mm of anchor hole bottom, carry out reaming, make borehole enlargement 1-2cm, in anchor hole bottom, form enlarged footing, reaming can make anchor pole bulge be anchored at firmly rock bottom.Like this, expansion piece can be softened in reaming, firmly stretching on hole wall after, in rock pore, pour into strong concrete or high strength grout, after solidifying, anchor pole and Foundation Rock Mass completely become one.Further greatly improved the supporting capacity of anchor pole.
In said structure, by anchoring nut, withstand chock, both can make to connect as one between chock and anchor bolt, meet the requirement of prestressed anchor structure, can make again between chock and anchor bolt detachable, like this, just can be according to different chock and the expansion piece that different size need to be installed on anchor bolt of construction, and the use of nut makes the processing of prestressed anchor simpler.
The prestressing force expansion anchor rod of said structure, expansion piece is strutted by chock, and contacts between anchor hole wall, makes to have maximum frictional force between anchor pole and anchor hole wall; Simultaneously, between chock and expansion piece with plane contact, when being applied with force pulling, between chock and expansion piece, contact closely, make to reach between chock and expansion piece maximum frictional force, under the effect of two kinds of power of the frictional force between above-mentioned expansion piece and anchor hole wall and the frictional force between expansion joint and chock, the prestressing force expansion anchor rod that the utility model provides improved and anchor hole wall between frictional force, increased supporting capacity, the concrete foundation of bearing larger dynamic load for complex formation joint ground or top, can meet the demands.
Particularly, expansion piece 3 is circular arc away from a side of anchor bolt 1 in the radially projecting of anchor bolt 1; And the angle of itself and plane equals the angle of the axis of inclined-plane and anchor bolt 1.In anchoring construction, general anchor hole be circle, by the said structure that is processed into of expansion piece 3, when expansion piece is strutted by level, when expansion piece contacts with anchor hole wall, can make to contact closely between expansion piece and anchor hole wall, does not stay gap.The mode of such close contact has increased the frictional force between expansion piece and anchor hole wall, has further increased the frictional force between prestressing force expansion anchor rod of the present utility model and anchor hole wall, has increased its supporting capacity.
Particularly, the expansion piece 3 of the prestressing force expansion anchor rod that the utility model provides is preferably set to two, and on chock 2, has two inclined-planes, and each inclined-plane all coordinates with an expansion piece 3.As it may occur to persons skilled in the art that, expansion piece 3 can be set to several, and still, the number of expansion piece is more, and the contact area after expansion piece is softened and between anchor hole wall is less, and the frictional force between anchor hole wall is also less.Therefore, the prestressing force expansion anchor rod expansion piece that the utility model embodiment provides is set to 2, makes the contact area between expansion piece and anchor hole wall reach maximum value, and frictional force reaches maximum value.
Particularly, when 2 expansion pieces 3 are set, it is measure-alike, symmetrically arranged that the prestressing force expansion anchor rod that the utility model embodiment provides is preferably designed to 2 expansion pieces 3.When expansion piece is softened while contacting with anchor hole wall, can obtain symmetrical, equal-sized frictional force.Contribute to improve the frictional force between anchor pole and anchor hole wall, thereby improve the supporting capacity of anchor pole.
Particularly, the size of expansion piece 3 in the direction of the intersection of the sagittal plane along place, inclined-plane plane and anchor bolt 1 is greater than the size that chock 2 makes progress the party.
Thereby between two expansion pieces and chock, just formed a space 5, while being conducive to construction perfusion mud, mud, strengthens the adhesion between bulge and anchor hole, thereby further strengthens the adhesion between anchor pole and anchor hole through bulge from space.
Particularly, expansion piece 3 makes progress and is of a size of 5-10cm in anchor bolt 1 footpath.
As it may occur to persons skilled in the art that, the size that expansion piece makes progress in anchor bolt footpath can, according to the needs of anchor bolt construction, be designed to arbitrary value.General in order to increase the frictional force between anchor pole and anchor hole wall, can be by its design larger, still, also need to consider in work progress, the upper force pulling that anchor bolt is applied is enough to make chock that expansion piece is strutted, and expansion piece and anchor hole wall are close to.In the utility model embodiment, by expansion piece 3, the maximum radial distance from a side of anchor bolt 1 to the side away from anchor bolt 1 is designed to 5-10cm, can meet the needs of present anchor bolt construction.
Particularly, the vertical dimension of the upper surface of expansion piece 3 to lower surface is 15-20cm.As it may occur to persons skilled in the art that, the vertical distance of the upper surface of expansion piece to lower surface can, according to the needs of anchor bolt construction, be designed to arbitrary value.General in order to increase the frictional force between anchor pole and anchor hole wall, can be by height design higher, still, also need to consider in work progress, the upper force pulling that anchor bolt is applied is enough to make chock that expansion piece is strutted, and expansion piece and anchor hole wall are close to.In the utility model embodiment, the vertical distance of the upper surface of expansion piece to lower surface is designed to the needs that 15-20cm can meet present anchor bolt construction.
The prestressing force expansion anchor rod that the utility model embodiment provides, also comprises connection cord (not shown in FIG.), is equipped with through hole (not shown in FIG.) on chock 2 and expansion piece 3, and connection cord is through through hole.Be chock with expansion piece between by connection cord, pass through hole and realize and being connected.
The prestressing force expansion anchor rod that the utility model embodiment provides adopts metal material to make, as iron; In work progress, after being assembled, prestressing force expansion anchor rod puts into the slightly large anchor hole in aperture, if chock and expansion piece are detachably connected, can in work progress, anchor bolt, chock and expansion piece be put into anchor hole simultaneously, easy to operate and save time; After prestressed anchor is put well, in the time of can being applied with force pulling to anchor bolt, anchor bolt can move up, chock can move up together with anchor bolt, when upper force pulling be far longer than between chock and expansion piece be connected power time, between chock and expansion piece to be connected power destroyed, between chock and expansion piece, be no longer connected, expansion piece and chock will produce relative motion along inclined-plane.
Prestressing force expansion anchor rod application prospect is boundless, can in wind-power electricity generation field blower foundation engineering, apply, can on power transmission line iron tower foundation, apply, can on dam foundation anchoring engineering, apply, even the reason based on same can be applied on compact soil foundation.
Take wind power plant engineering as example analysis prestressing force expansion anchor rod advantage.Traditional wind basis adopts circular or polygon row reinforced concrete spread foundation more.The advantage of reinforced concrete spread foundation is technology maturation, by vast wind-powered electricity generation enterprise is accepted.Spread footing weak point is base concrete large usage quantity, and amount of reinforcement is large, and during construction, earthwork evacuation amount is large, and also larger to environmental disruption.Current many wind energy turbine set are located in mountain area, prestressed anchor blower foundation can be given full play to the mechanical property of original state rock mass, the prestressed anchor of utilization in rock resisted the outside load producing of blower fan and blower fan, thereby thereby reaches and reduce blower foundation concrete side amount, reduce excavated volume and reach the object of reducining the construction costs.In blower foundation engineering, adopt prestressing force expansion anchor rod basis, reduce engineering construction cost and can reach more than 30%, also reduced the destruction to environment simultaneously, there is economical and social double benefit.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims (8)

1. a rock prestressing force expansion anchor rod, is characterized in that, comprising: anchor bolt, anchoring nut and bulge; One end of described anchoring nut and described anchor bolt is threaded connection; Described bulge comprises chock and expansion piece, and described chock is enclosed within outside described anchor bolt and offsets with described anchoring nut; Described chock exists towards the inclined-plane of the side away from described anchoring nut away from the sidepiece of described anchor bolt, has a plane on described expansion piece, described plane and the laminating of described inclined-plane;
When described expansion piece and described chock produce relative motion along described inclined-plane, described expansion piece can be greater than described chock apart from the distance of described anchor bolt away from a side of described anchor bolt apart from the distance of described anchor bolt.
2. prestressing force expansion anchor rod according to claim 1, is characterized in that, described expansion piece is circular arc away from a side of described anchor bolt in the radially projecting of described anchor bolt; And the angle of itself and described plane equals the angle of the axis of described inclined-plane and described anchor bolt.
3. prestressing force expansion anchor rod according to claim 1, is characterized in that, described expansion piece is set to two; On described chock, have two described inclined-planes, and described in each, inclined-plane all coordinates with a described expansion piece.
4. prestressing force expansion anchor rod according to claim 3, is characterized in that, described expansion piece is symmetrical arranged.
5. prestressing force expansion anchor rod according to claim 3, is characterized in that, the size of described expansion piece in the direction of the intersection of the sagittal plane along described inclined-plane place plane and anchor bolt is greater than the size that described chock makes progress the party.
6. prestressing force expansion anchor rod according to claim 4, is characterized in that, described expansion piece makes progress and is of a size of 5-10cm in described anchor bolt footpath.
7. prestressing force expansion anchor rod according to claim 4, is characterized in that, the vertical dimension of the upper surface of described expansion piece to lower surface is 15-20cm.
8. prestressing force expansion anchor rod according to claim 1, is characterized in that, also comprises connection cord, on described chock and described expansion piece, is equipped with through hole, and described connection cord is through described through hole.
CN201320672212.5U 2013-10-28 2013-10-28 Rock pre-stressed expansion anchor rod Expired - Fee Related CN203530977U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320672212.5U CN203530977U (en) 2013-10-28 2013-10-28 Rock pre-stressed expansion anchor rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320672212.5U CN203530977U (en) 2013-10-28 2013-10-28 Rock pre-stressed expansion anchor rod

Publications (1)

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CN203530977U true CN203530977U (en) 2014-04-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106320367A (en) * 2016-10-11 2017-01-11 北京健安诚岩土工程有限公司 Prestress rock anchor rod foundation with anchor rods capable of being replaced

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106320367A (en) * 2016-10-11 2017-01-11 北京健安诚岩土工程有限公司 Prestress rock anchor rod foundation with anchor rods capable of being replaced
CN106320367B (en) * 2016-10-11 2018-08-24 北京健安诚岩土工程有限公司 The prestressed rock anchor rod foundation of replaceable anchor pole

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: WANG YAOBO

Effective date: 20140423

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20140423

Address after: 050024 No. 3, unit 17, 319, Yucai street, Yuhua District, Hebei, Shijiazhuang, 302

Patentee after: Guo Bingshan

Patentee after: Wang Yaobo

Address before: 050024 No. 3, unit 17, 319, Yucai street, Yuhua District, Hebei, Shijiazhuang, 302

Patentee before: Guo Bingshan

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140409

Termination date: 20201028