CN102182182A - Pressure-yielding anchor device - Google Patents
Pressure-yielding anchor device Download PDFInfo
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- CN102182182A CN102182182A CN2011100917534A CN201110091753A CN102182182A CN 102182182 A CN102182182 A CN 102182182A CN 2011100917534 A CN2011100917534 A CN 2011100917534A CN 201110091753 A CN201110091753 A CN 201110091753A CN 102182182 A CN102182182 A CN 102182182A
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- extrusion head
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- ground tackle
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Abstract
The invention discloses a pressure-yielding anchor device, which comprises an extrusion head, a pressure-yielding sleeve and anchor bars, wherein the extrusion head is a cylinder with the conical surface at the lower part and movably connected with the anchor bars into a whole; and the extrusion head is arranged in the pressure-yielding sleeve, the raised surface matched with the conical surface at the lower part of the extrusion head is arranged on the inner wall of the pressure-yielding sleeve, the pressure-yielding sleeve is a steel pipe with a raised edge on the inner wall preferably, and the raised surface matched with the conical surface of the extrusion head is arranged at the end part of the raised edge. By adopting the pressure-yielding anchor device, the purposes of yielding pressure, dissipating energy and controlling deformation can be realized during anchoring, and the pressure-yielding anchor device is applicable to the anchor bars made of any material. The pressure-yielding anchor device is convenient to manufacture, reliable in effects and applicable to different engineering needs.
Description
Technical field
The present invention relates to a kind of ground tackle, especially relate to a kind of ground tackle, be applied to the anchoring of the distortion of bridge and building structure and energy dissipating, geotechnical engineering stratum ground with stressed surrender of energy dissipating and distortion.
Background technology
At present, surplus anchor pole that geotechnical engineering circle has occurred or anchor cable have 10 type, having become is the main means of rock-reinforcing.Their common loading characteristic is that the distortion of anchor cable must be coordinated mutually with the distortion of geotechnical body, and the deflection of rock mass has surpassed the maximum deformation quantity of anchor cable permission and will have been broken.The load-bearing device that can do with blast and earthquake intense impact and vibration deformation and can keep predetermined force to work on plays crucial effect in actual applications.As surrender anchor pole or anchor cable device in the geotechnical engineering, tackle the Deformation control of deep formation rock burst or large deformation, geotechnical slope and foundation ditch etc.; When preventing earthquake on bridge pier, ground structure thing such as bridge control beam shock-damping device etc.
The whole stress of surrender anchor pole or anchor cable device is " bullet is moulded " property seemingly.When the deflection of rock mass makes the pulling force of anchor pole or anchor cable surpass the design yield force, anchor bar body between interior anchoring section and the outer anchoring section or anchor cable cognition are keeping under the constant situation of pulling force automatic " elongation ", it is the same that erect image is done the tension test of steel, tensile stress reaches yield limit, pulling force is constant, and the body of rod increases.
In geotechnical anchor engineering, surrender anchor pole or anchor cable device can solve some special geological condition, the vibrations distortion that blast causes as earthquake or high energy, press the deep formation rock burst that causes greatly or the large deformation situation of large deformation and geotechnical slope and deep foundation ditch etc., surrender anchor pole or anchor cable device to be a kind ofly can to keep predetermined anchored force and can form certain " distortion " amount again and eliminate vibration energy or adapt to anchor pole or the anchor cable that is out of shape.This anchor pole or anchor cable claim to surrender anchor pole or surrender anchor cable, or are generically and collectively referred to as and allow the pressure ground tackle.Existing allowing presses ground tackle to mainly contain following two kinds of forms:
1, adopt and to allow pressure device (as spring washer etc.) between anchor plate and the fixture, it allows presses displacement less, is applicable to that the less engineering of distortion such as hard rock allows pressure.
2, adopt extruded sleeve and anchoring medium on presstressed reinforcing steel, to form to allow the pressure anchor cable, as Chinese utility model patent ZL200820104437.X or Chinese invention patent application 200810073713.5 disclosed a kind of pressure ground tackle and recoverable version anchor cables of allowing.Its technical scheme is to reserve one section presstressed reinforcing steel behind extruded sleeve, by the effect of extruded sleeve and anchoring medium, realizes allowing pressure.This technology is only applicable to anchor cable (steel strand), is not suitable for the pressure that allows of bar reinforcement anchor pole; Particularly because presstressed reinforcing steel must pass through extruded sleeve, sleeve pipe must be divested when presstressed reinforcing steel adopts unbonded tendon presstressed reinforcing steel this moment, in application process, this section presstressed reinforcing steel unprotect layer is then easily sent out corrosion, reduction anchor cable application life.
In bridge engineering, antidetonation is a kind of expensive high technology.It is not high that some destroys importance degree, accomplish that big shake do not stride the act of the best that is seismic design, promptly when the intensity earthquake takes place, after beam appears falling in bridge, can be held by bridge pier but not stride by the device of a kind of energy dissipating and controlled deformation and collapse, could guarantee the security of the lives and property on the bridge like this.
Summary of the invention
The invention provides a kind of pressure ground tackle that allows, realize allowing the purpose of pressure, energy dissipating and controlled deformation when reaching anchoring, and be applicable to the dowel of any material.
A kind of pressure ground tackle that allows comprises extrusion head, allows gland tube and the dowel, described extrusion head be the cylinder that the bottom has the conical surface, and described extrusion head flexibly connects with dowel in use and is integral; Described extrusion head places and allows in the gland tube, allows gland tube inwall be provided with the raised face (RF) that matches with the conical surface of extrusion head bottom.
The conical surface of described extrusion head bottom is the straight line conical surface or the curve conical surface.The straight line conical surface or the curve conical surface of described extrusion head can be interrupted, also can be continuously annular, be preferably annular continuously.
Preferably, the described gland tube that allows has the steel pipe of lug, nib for inwall, the raised face (RF) of the end of lug, nib for matching with the conical surface of extrusion head.
The described lug, nib that allows gland tube inwall is some vertically uniformly straight continuously lug, nib or oblique lug, nib, is preferably 6.
The described inwall of gland tube one end afterbody that allows has the on-slip ring washer.Described on-slip ring washer is an annular, fits in integral body with sleeve lining, and on-slip ring washer internal diameter is less than the extrusion head external diameter and match.
The described top and bottom of gland tube that allow are respectively equipped with sealing lid, its with allow gland tube and dowel cooperate, prevent that apparatus of the present invention from installing in material that lubricant grease in the sleeve in back and the duty blends the external world outward goes into.
Described extrusion head is provided with centre bore, and described centre bore can also can be partial bores by through hole, is provided with internal thread in the hole.Extrusion head can carry out anchor connection with the dowel of any material, thereby realizes anchoring, as steel strand, and steel tendon, bar reinforcement, hollow rods etc.
Described dowel outside can be with sleeve pipe also can not be with sleeve pipe.
When described dowel was steel strand or steel tendon, described extrusion head centre bore was a through hole, and dowel is fixedly realized anchoring after passing extrusion head again.
When described dowel bar reinforcement or hollow rods, dowel is fixedly realized anchoring by the screw-internal thread fit of the centre bore of thread surface and extrusion head.
The mechanism of action of pressure ground tackle that allows of the present invention is under the effect of externally pulling force, dowel is under certain pulling force, when value of thrust surpassed the sleeve lining conical surface or lug, nib intensity, conical surface of inboard wall or lug, nib distortion surrender drove extrusion head is done constant force with respect to sleeve slippage.When being lower than this value of thrust, extrusion head and sleeve play the anchoring effect to dowel, not slippage of dowel.Realize that in ground anchorage anchor pole (rope) can adapt to the bigger distortion that ground produces in the stratum, realization allows the pressure effect, can allow the shifting ground plastid in anchoring the injurious deformation appropriateness be discharged, and safeguards anchoring effect, guarantee the reliable of anchoring, for the safety of engineering provides safeguard.The present invention plays the energy dissipating effect and keeps pontic to be held by cable wire from the bridge pier bearing pad back that comes off because of earthquake aspect bridge earthquake resistance, does not land, and makes that vehicle and pedestrains safety play best protection on the bridge, also is impaired being reduced to a minimum of protection beam body simultaneously.
Of the present invention allow press ground tackle by extrusion head with allow the relative displacement of gland tube realize, can not do any processing to dowel, guarantee that its mechanical property is constant; Adopt inside allow pressures, do not influence the hole space outerpace, allow the pressure amount can be by allowing the adjusting of gland tube length degree, apparatus of the present invention are easily manufactured, and be reliable for effect, adapt to different requirement of engineering.
Description of drawings
Fig. 1 is the structural representation of first kind of embodiment of the present invention.
Fig. 2 is the structural representation of extrusion head of the present invention.
Fig. 3 is the structural representation of second kind of embodiment of the present invention.
Fig. 4 is the structure cross-sectional schematic that allows the gland tube of second kind of embodiment of the present invention.
Fig. 5 is an A-A sectional drawing among Fig. 4.
Fig. 6 is the structural representation of the third embodiment of the present invention.
Fig. 7 presses the ground anchorage example schematic at the bottom of ground tackle is applied to the hole for the present invention allows.
Fig. 8 presses ground tackle to be applied to the ground anchorage example schematic in aperture for the present invention allows.
Fig. 9 presses ground tackle to be applied to the example schematic of a kind of form in the anti-earthquake centre of bridge for the present invention allows.
Figure 10 presses ground tackle to be applied to the example schematic of the another kind of form in the anti-earthquake centre of bridge for the present invention allows.
The specific embodiment
As shown in Figure 1 and Figure 2, a kind of allowing pressed the ground tackle device, comprises extrusion head 1, allows gland tube 2, and extrusion head 1 has the cylinder 11 of the conical surface 12 for the bottom, and dowel 3 passes extrusion head 1 back and links into an integrated entity by fixture 15 and extrusion head 1; Extrusion head 1 places and allows in the gland tube 2, allows gland tube 2 inwalls be provided with the raised face (RF) 22 that matches with the conical surface 12 of extrusion head 1.
The conical surface 12 of extrusion head 1 is the straight line conical surface or the curve conical surface, and annular continuously.
As Fig. 3, Fig. 4, shown in Figure 5, allow gland tube 2 have many equally distributed straight lug, nibs 21, the raised face (RF) 22 of the end of straight lug, nib 21 for matching with the conical surface 12 of extrusion head 1 for inwall.Described straight lug, nib 21 quantity and projection size are complementary by the load-bearing ability of reinforcing bar 3, are illustrated as 6 straight lug, nibs.
The upper end of described sleeve 2 is provided with top cover labyrinth 24, and the bottom is provided with lower sealing cover 25, and it cooperates with sleeve 2 and dowel 3, prevents that apparatus of the present invention from installing in material that lubricant greases in the sleeve 2 in back and the duty blend the external world outward goes into.
Be illustrated in figure 6 as and allow gland tube 2 another embodiments, the described inwall of gland tube 2 one end afterbodys that allows has on-slip annular ring washer 23.Described on-slip annular ring washer 23 fits in integral body with sleeve 2 inwalls, has enough thickness and intensity, and on-slip ring washer 23 internal diameters are less than extrusion head 1 external diameter and match, and extrusion head 1 is played the on-slip effect and bears the load action of dowel 3.
Ground tackle of the present invention can be implemented in ground anchorage, and as Fig. 7, shown in Figure 8, Fig. 7 allows the ground anchorage example schematic at the bottom of the hole of being applied to of pressing ground tackle, allows this moment and presses ground tackle to be positioned at the bottom of anchor hole.
Fig. 8 allows press ground tackle to be applied to the ground anchorage example schematic in aperture, allow this moment and press ground tackle to be positioned at the aperture of anchor hole, the ground tackle front end is an anchorage head 8, described anchorage head 8, but mechanical anchor mode or chemical anchoring mode (as steel rise shell anchorage head or resin explosive roll anchorage head).
Implementation step is as follows in ground anchorage:
Have allow a whole set of anchor pole of pressing ground tackle or anchor cable be installed in the anchor hole 6 after, backing plate 4 and hold-down nut 5 are installed, carry out slip casting, in anchor hole, form injecting cement paste 7, when slurry consolidation to a certain degree, can carry out prestressed stretch-draw or stretch-draw prestressing force not according to project situation.
Under certain pulling force, the value of thrust certain to the rock mass condition enactment plays the anchoring effect by extrusion head 1 and 2 pairs of dowels 3 of sleeve, can realize the prestressed stretch-draw of certain value as dowel 3, forms initial initiatively pulling force.During as stretch-draw prestressing force situation not, anchor pole is passive stressed effect behind stratum deformation, produces certain passive pulling force.
In work, cable wire 3 pulling force are lower than when allowing the straight lug, nib 21 yield deformation values of gland tube 2, extrusion head 1 with allow 3 anchorings of 2 pairs of cable wires of gland tube, reinforcing bar 3 not slippages.
When geostatic stress becomes big, when pulling force that dowel bears surpasses this design load, dowel 3 drives extrusion head 1 with respect to allowing gland tube 2 do the slippage of constant force, be extrusion head 1 and allow lug, nib 21 mutual extrusion in the gland tube 2 move, realize the surrender effect of anchor pole (rope), to adapt to the bigger distortion that ground is produced, keep the setting stress value that rock mass is applied simultaneously.Can allow the shifting ground plastid in anchoring, injurious deformation appropriateness be discharged, safeguard anchoring effect, guarantee the reliable of anchoring, for the safety of engineering provides safeguard.
Ground tackle of the present invention can be used in the bridge anchoring, as Fig. 9, shown in Figure 10.
As shown in Figure 9, two ends all have allows the whole anchor cable of two covers of pressing ground tackle be divided into bridge pier 200 both sides by retainer ring 102 1 ends, two bridges 100 respectively by 300 of bearings on bridge pier 200, the other end of the whole anchor cable of two covers carries out anchoring with two bridges 100 respectively by the retainer ring 101 of bridge 100 bottoms.
As shown in figure 10, two ends all have allows the cable wire 3 of the whole anchor cable of pressing ground tackle pass bridge pier 200 both sides, carries out anchoring by the retainer ring of being located at by 300 bridge 100 bottoms on bridge pier 300 of bearing 101 with bridge 100 respectively.
Implementation step is as follows in bridge is used:
Give certain pretightning force value of cable wire 3 in the installation process, make extrusion head 1 and allow 2 pairs of cable wires 3 of gland tube have locking effect, and performance work.
In work, cable wire 3 pulling force are lower than when allowing the straight lug, nib 21 yield deformation values of gland tube 2, extrusion head 1 with allow 3 anchorings of 2 pairs of cable wires of gland tube, cable wire 3 not slippages.
When earthquake or the generation of other stress; when cable wire 3 pulling force that bears surpasses this design load; cable wire 3 drives extrusion head 1 with respect to allowing gland tube 2 do the slippage of constant force; be extrusion head 1 and allow lug, nib 21 mutual extrusion in the gland tube 2 move; realize the surrender of anchor cable; allow the pressure effect; to adapt to the moderate finite deformation of generation; reduce and impact and energy dissipating; the injurious deformation appropriateness is discharged; keep pontic to be held by cable wire 3 after bridge pier bearing pad comes off in generation as far as possible; do not land, make that vehicle and pedestrains safety play best protection on the bridge, be impaired being reduced to a minimum of protection beam body simultaneously yet.
Claims (10)
1. one kind allows the pressure ground tackle, comprises extrusion head (1), allows gland tube (2) and dowel (3), it is characterized in that: described extrusion head (1) has the cylinder (11) of the conical surface (12) for the bottom, and described extrusion head (1) flexibly connects with dowel (3) and is integral; Described extrusion head (1) places and allows in the gland tube (2), allows gland tube (2) inwall be provided with the raised face (RF) (22) that matches with the conical surface (12) of extrusion head (1).
2. the pressure ground tackle that allows according to claim 1 is characterized in that: the conical surface (12) of described extrusion head (1) bottom is the straight line conical surface or the curve conical surface.
3. the pressure ground tackle that allows according to claim 2 is characterized in that: the conical surface (12) annular of described extrusion head (1) bottom continuously.
4. according to claim 1 or the 2 or 3 described pressure ground tackles that allow, it is characterized in that: described extrusion head (1) is provided with centre bore.
5. the pressure ground tackle that allows according to claim 1 is characterized in that: the described gland tube (2) that allows has the steel pipe of lug, nib (21) for inwall, the raised face (RF) (22) of the end of lug, nib (21) for matching with the conical surface (12) of extrusion head (1).
6. the pressure ground tackle that allows according to claim 5 is characterized in that: the described lug, nib (21) that allows gland tube (2) inwall is some vertically uniformly straight continuously lug, nib or oblique lug, nib.
7. the pressure ground tackle that allows according to claim 6 is characterized in that: the described lug, nib (21) of gland tube (2) inwall that allows is 6.
8. according to the described pressure ground tackle that allows of the arbitrary right of claim 4-7, it is characterized in that: the described interior inwall of an end afterbody of lug, nib (21) of being with of gland tube (2) that allows has on-slip ring washer (23).
9. the pressure ground tackle that allows according to claim 1 is characterized in that: the described two ends of gland tube (2) that allow are provided with upper cover (24) and following capping (25).
10. the pressure ground tackle that allows according to claim 1 is characterized in that: described dowel (3) is steel strand, steel tendon, bar reinforcement or hollow rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110091753 CN102182182B (en) | 2011-04-13 | 2011-04-13 | Pressure-yielding anchor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110091753 CN102182182B (en) | 2011-04-13 | 2011-04-13 | Pressure-yielding anchor device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102182182A true CN102182182A (en) | 2011-09-14 |
| CN102182182B CN102182182B (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110091753 Active CN102182182B (en) | 2011-04-13 | 2011-04-13 | Pressure-yielding anchor device |
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| CN (1) | CN102182182B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619226A (en) * | 2012-04-19 | 2012-08-01 | 杭州图强工程材料有限公司 | Pressure dispersion type yielding anchor cable |
| CN102953377A (en) * | 2012-11-12 | 2013-03-06 | 杭州图强工程材料有限公司 | Pressure-release anchor cable |
| CN103016035A (en) * | 2012-12-27 | 2013-04-03 | 辽宁工程技术大学 | Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine |
| CN104819004A (en) * | 2015-04-24 | 2015-08-05 | 山西中煤四达机电设备有限公司 | Constant-resistance conceding prestressed steel stranded wire anchor cable |
| CN105064621A (en) * | 2015-08-31 | 2015-11-18 | 裴唯雅 | Steel rope and reinforcing steel bar connector |
| CN106223343A (en) * | 2016-07-20 | 2016-12-14 | 华北水利水电大学 | Automatic flip device is utilized to carry out foundation pit supporting method and the structure of soil nailing recovery |
| CN106761868A (en) * | 2016-12-30 | 2017-05-31 | 安徽理工大学 | A kind of novel durable magnetizes anchor pole |
| CN107461215A (en) * | 2017-08-29 | 2017-12-12 | 河南理工大学 | A kind of back timber formula anchor cable constant-resistance structure and its installation method |
| CN110004950A (en) * | 2019-05-10 | 2019-07-12 | 中国地质科学院探矿工艺研究所 | Construction method of bidirectional automatic adjustment type prestressed anchor cable |
| CN110630305A (en) * | 2019-11-05 | 2019-12-31 | 兰州交通大学 | Controllable pressure stock that lets in tunnel |
| CN112878323A (en) * | 2021-01-08 | 2021-06-01 | 中国水利水电科学研究院 | Assembled pre-stressed anchor cable structure |
| CN113653522A (en) * | 2021-09-16 | 2021-11-16 | 河海大学 | Self-tapping type yielding anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function |
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| CN87202281U (en) * | 1987-02-21 | 1987-12-31 | 中国矿业学院 | Extrusion type extendible anchor rod |
| GB2284032A (en) * | 1993-11-06 | 1995-05-24 | Longleys | Bolt anchoring device |
| AU722997B2 (en) * | 1998-03-18 | 2000-08-17 | Henry Alexander Stirling | Yielding adapter for rock bolts |
| CN202099800U (en) * | 2011-04-13 | 2012-01-04 | 杭州图强工程材料有限公司 | Yielding anchorage device |
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2011
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Patent Citations (4)
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| CN87202281U (en) * | 1987-02-21 | 1987-12-31 | 中国矿业学院 | Extrusion type extendible anchor rod |
| GB2284032A (en) * | 1993-11-06 | 1995-05-24 | Longleys | Bolt anchoring device |
| AU722997B2 (en) * | 1998-03-18 | 2000-08-17 | Henry Alexander Stirling | Yielding adapter for rock bolts |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619226A (en) * | 2012-04-19 | 2012-08-01 | 杭州图强工程材料有限公司 | Pressure dispersion type yielding anchor cable |
| CN102619226B (en) * | 2012-04-19 | 2014-11-05 | 杭州图强工程材料有限公司 | Pressure dispersion type yielding anchor cable |
| CN102953377A (en) * | 2012-11-12 | 2013-03-06 | 杭州图强工程材料有限公司 | Pressure-release anchor cable |
| CN102953377B (en) * | 2012-11-12 | 2015-04-01 | 杭州图强工程材料有限公司 | Pressure-release anchor cable |
| CN103016035A (en) * | 2012-12-27 | 2013-04-03 | 辽宁工程技术大学 | Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine |
| CN103016035B (en) * | 2012-12-27 | 2014-12-03 | 辽宁工程技术大学 | Abdicating buffer energy-absorbing shock-proof anchor rod cable for coal mine |
| CN104819004A (en) * | 2015-04-24 | 2015-08-05 | 山西中煤四达机电设备有限公司 | Constant-resistance conceding prestressed steel stranded wire anchor cable |
| CN105064621A (en) * | 2015-08-31 | 2015-11-18 | 裴唯雅 | Steel rope and reinforcing steel bar connector |
| CN106223343A (en) * | 2016-07-20 | 2016-12-14 | 华北水利水电大学 | Automatic flip device is utilized to carry out foundation pit supporting method and the structure of soil nailing recovery |
| CN106761868A (en) * | 2016-12-30 | 2017-05-31 | 安徽理工大学 | A kind of novel durable magnetizes anchor pole |
| CN106761868B (en) * | 2016-12-30 | 2019-04-30 | 安徽理工大学 | A kind of novel durable magnetization anchor pole |
| CN107461215A (en) * | 2017-08-29 | 2017-12-12 | 河南理工大学 | A kind of back timber formula anchor cable constant-resistance structure and its installation method |
| CN110004950A (en) * | 2019-05-10 | 2019-07-12 | 中国地质科学院探矿工艺研究所 | Construction method of bidirectional automatic adjustment type prestressed anchor cable |
| CN110630305A (en) * | 2019-11-05 | 2019-12-31 | 兰州交通大学 | Controllable pressure stock that lets in tunnel |
| CN112878323A (en) * | 2021-01-08 | 2021-06-01 | 中国水利水电科学研究院 | Assembled pre-stressed anchor cable structure |
| CN113653522A (en) * | 2021-09-16 | 2021-11-16 | 河海大学 | Self-tapping type yielding anchor rod capable of controlling large deformation of soft rock and having displacement monitoring function |
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