CN104963339A - Anchor cable centering support device - Google Patents
Anchor cable centering support device Download PDFInfo
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- CN104963339A CN104963339A CN201510393401.2A CN201510393401A CN104963339A CN 104963339 A CN104963339 A CN 104963339A CN 201510393401 A CN201510393401 A CN 201510393401A CN 104963339 A CN104963339 A CN 104963339A
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- anchor cable
- groove
- holder device
- centering
- centering bracket
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Abstract
The invention discloses an anchor cable centering support device. The anchor cable centering support device comprises a grout pipe (1) located at the center position, isolating supports (2) wrapped in the periphery of the grout pipe (1) in the circumferential direction and corrugated protecting pipes (4) located at the outer layer. Outer grooves (2-1) dimpled outward are arranged in the inner walls of the isolating supports (2) at intervals, inner grooves (2-2) dimpled inward are arranged in the outer walls of the isolating supports (2) at intervals, and stranded steel wires are both fixed to the outer grooves (2-1) and the inner grooves (2-2). The corrugated protecting pipes (4) are cylinders and wrap the isolating supports (2). Centering support bases (7) with same interval are wrapped on the outer walls of the corrugated protecting pipes (4) in the circumferential direction. According to the anchor cable centering support device, the problems that an existing clamping cabal is difficult to install is solved, and the advantages of decreasing prestressing loss of the anchor cable and guaranteeing the reinforcement effect of the anchor cable and construction quality are achieved.
Description
Technical field
The present invention relates to water conservancy and hydropower, road, bridge, geotechnical engineering consolidation process field, more specifically a kind of anchor cable centering holder device.
Background technology
Since the sixties in 20th century, Anchor Cable Technique introduced China, this technology is widely used at many engineering fields, and the achievement especially obtained in water conservancy and hydropower is more remarkable.At present, anchor cable has become the important technology of the Hydraulic and Hydro-Power Engineering dam foundation, side slope, underground chamber support reinforcement.Anchor cable is generally formed by high strength steel strand layout arranged side by side, is pushed in the ground boring completed in advance, then first carries out grouting bonding to its root and fix by manual type, then carries out stretch-draw to apply buffer brake to being reinforced rock mass at domatic exposed junction.For ensureing that anchor cable is not corroded by extraneous medium (underground water, air); isolation mount is provided with between each twisted wire of anchor cable body; centering support is provided with outside corrugated protective conduits; be ensure that anchor cable body occupy drill center to the Main Function of medium-height trestle, make that anchor cable is external has uniform cement grout to protect thickness.
For ensureing the construction quality of anchor cable, anchor cable construction must carry out in strict accordance with related specifications, technical requirements.But in view of mostly anchor cable construction is at the complex condition such as high gradient slope, narrow cavern, in practice of construction process, anchor cable is installed very difficult, and main manifestations goes out following problem:
1, anchor cable difficulty, kayser Frequent Accidents is pushed
Anchor cable construction is generally undertaken by following construction sequence: measurement and positioning → pore-creating → anchor cable making → anchor cable installation → anchor cable grouting → anchor cable grading tension → anchor pier concreting.Wherein, anchor cable is installed and is referred to after anchor cable completes, and to be pushed to by the anchor cable body completed in the boring completed in advance by manual type.
(1) in the anchor cable installation process of reality, because anchor cable length is long (for the 3000kN level anchor cable of extensive use, its length is generally 30m-50m), borehole wall is coarse, cause centering bracket tab position and borehole wall frictional resistance large.Along with anchor cable body is pushed to the increase of length in drilling hole, the frictional resistance that medium-height trestle bears also progressively is increased, cause the installation difficulty of anchor cable also to increase thereupon.Longer, the whole installation process difficulty of anchor cable length is larger.
(2) in anchor cable practice of construction, due to its weight large (length is that the 3000kN level anchor cable weight of 30m-50m is generally 0.8t-1.3t), therefore need in installation process tens people even tens people bear simultaneously and push and just can complete.When anchor cable pushes, coarse borehole wall very easily damages anchor cable accessory and overcoat, and the frictional resistance even causing anchor cable body local to bear is excessive, causes the centering bracket tab position of this place's anchor cable body to be stuck in hole, causes Carcel phenomenon.
(3) if when occurring in actual anchor cable work progress to push the phenomenons such as anchor cable difficulty, Carcel, anchor cable will be extracted out in necessary situation, and the damaged condition of the anchor cable body accessory riding position of extracting out, overcoat is checked, have impact on the progress of anchor cable construction operation.
2, anchor cable body easily reverses, and loss of prestress is serious
(1) anchor cable is by steel strand, isolation mount, form the parts such as medium-height trestle, corrugated protective conduits, and its mechanical characteristic is linear flexible object.As the anchor cable body of flexible articles, in carrying and propelling movement process, anchor cable cognition twists vertically, and anchor cable is presented " twisted shape ".Because anchor cable body has certain rigidity and elasticity, after twisting, corresponding automatic generation reactive torque known from experience by anchor cable, anchor cable is driven to rotate to gyratory directions, but the frictional resistance born due to centering bracket tab part is larger, reactive torque is difficult to overcome frictional resistance, finally causes anchor cable body to be in twisting states in hole.Cause the distortion shutoff of stack and Grouting Pipe, affect later stage slip casting effect, maybe need to extract and again repair installation, even anchor cable is scrapped.
(2) anchor cable body generation axial torsion not only can cause stack and Grouting Pipe distortion, and also can cause great adverse effect to later stage anchorage cable stretching.Because anchor cable body is twisted state, anchor cable twisted wire frictional force in stretching process is increased, thus makes anchored force generation linear loss, cause prestressd anchor cable to lose, finally have influence on the anchoring effect of anchor cable.
Summary of the invention
The object of the invention is to overcome existing anchor cable and the shortcomings such as difficulty, Carcel and loss of prestress be serious are installed, and propose a kind of anchor cable centering holder device, which ensure that the anchoring quality of anchor cable.
A kind of anchor cable centering of the present invention holder device, is positioned at the grout pipe in centre, hoop is wrapped in the isolation mount of described grout pipe periphery and is positioned at outer field corrugated protective conduits; On described isolation mount inwall, the outer groove of outwards depression is arranged at interval, and on described isolation mount outer wall, the inner groovy caved inward is arranged at interval; Described outer groove and inner groovy are all fixed with steel strand, described corrugated protective conduits be cylinder and parcel described in isolation mount; On described corrugated protective conduits outer wall, hoop is enclosed with equally spaced centering bracket base.
In technique scheme: described centering bracket base is alternate is along its length furnished with centering bracket tab position in prism-shaped and preformed hole.
In technique scheme: described center, centering bracket tab position is provided with universal wheel mounting groove, described universal wheel mounting groove is by caving in hemispheric groove seat and be positioned at groove lid on described groove seat and form.
In technique scheme: the inner hollow out of described groove seat, covers at described groove seat and groove and be provided with reserved screw duct.
In technique scheme: be provided with universal wheel in described groove seat, described universal wheel is that the little hard PVC medicine ball of 2.5mm forms by 1 diameter 14mm large hard PVC medicine ball and several diameters.
In technique scheme: described centering bracket base axial spacing is 1m, and the salient point of described centering bracket base engages with the groove of described corrugated protective conduits.
In technique scheme: cover at described groove and be provided with colligation groove, described colligation slot is in the both sides in described reserved screw duct.
In technique scheme: described preformed hole is made up of two rectangular openings and a racetrack annular aperture; Two rectangular openings described in two and a racetrack annular aperture alternate layout in the width direction, described racetrack annular aperture is positioned in the middle of the rectangular opening described in two.
In technique scheme: the material of described centering bracket base is rigid plastics, and described centering bracket base is of a size of 360mm × 80mm × 2mm.
In technique scheme: the height at described centering bracket tab position is 19mm, and described rectangular opening is of a size of 20mm × 5mm.
The present invention has following technological merit: 1, significantly reduce the frictional resistance to medium-height trestle and borehole wall, ensure that anchor cable can push to the pre-buried degree of depth of design smoothly, avoids Carcel phenomenon to occur, improve anchor cable construction efficiency.
The frictional force of tradition anchor cable body to medium-height trestle and borehole wall is the sliding friction of boss and hole wall.Anchor cable centering holder device advantage of the present invention is, universal wheel can will be converted into the rolling friction of universal wheel spheroid and borehole wall effectively to the sliding friction of medium-height trestle and borehole wall.Under normal conditions, the rolling friction of object only has 1/40 to 1/60 of sliding-frictional resistance, therefore, apparatus of the present invention reduce the frictional resistance that the anchor cable body in anchor cable propelling movement process is subject to dramatically, the installation difficulty of anchor cable is reduced from structure, improve anchor cable once mounting success rate and construction effect, save the construction period, significant especially for slope reinforcement emergency work.
2, after ensureing anchor cable installation, anchor cable body in straight state, effectively reduces loss of prestress in anchorage cable stretching process in boring, ensures anchorage cable anchoring quality.
Because this invention has universal wheel unit to medium-height trestle, not only reduce anchor cable and push axis frictional resistance, also can reduce the radial frictional resistance of anchor cable, make anchor cable body smooth-going from Row sum-equal matrix under rotary torque effect.Therefore avoid and twist at propelling movement process stream line body, after ensure that anchor cable installation, anchor cable is in straight state all the time in boring.This anchor cable being in straight state, in stretching process, the linear loss of anchored force is reduced greatly, ensure that prestressd anchor cable reaches design rating.Therefore, present invention reduces prestressd anchor cable loss, ensure that the consolidation effect of anchor cable and the construction quality of engineering.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of anchor cable.
Fig. 2 is A-A generalized section in Fig. 1.
Fig. 3 is anchor cable centering holder device drawing of the present invention.
Fig. 4 is anchor cable centering holder device longitudinal plan of the present invention.
Fig. 5 is centering bracket tab position drawing in side sectional elevation.
In figure: grout pipe 1, isolation mount 2, outer groove 2-1, inner groovy 2-2, steel strand 3, corrugated protective conduits 4, universal wheel mounting groove 5, groove seat 5-1, groove lid 5-2, universal wheel 6, centering bracket base 7, centering bracket tab position 7-1, preformed hole 7-2, colligation groove 7-3.Rectangular opening 8, racetrack annular aperture 9.
Detailed description of the invention
Describe performance of the present invention in detail below in conjunction with accompanying drawing, but they do not form limitation of the invention, only for example; To become clearly and easy understand advantage of the present invention by illustrating simultaneously.
With reference to shown in Fig. 1-5: a kind of anchor cable centering holder device, be positioned at the grout pipe 1 in centre, hoop is wrapped in the isolation mount 2 of described grout pipe 1 periphery and is positioned at outer field corrugated protective conduits 4; On described isolation mount 2 inwall, the outer groove 2-1 of outwards depression is arranged at interval, and on described isolation mount 2 outer wall, the inner groovy 2-2 caved inward is arranged at interval; Described outer groove 2-1 and inner groovy 2-2 is all fixed with steel strand 3, the isolation mount 2 of described corrugated protective conduits 4 in cylinder and described in parcel; On described corrugated protective conduits 4 outer wall, hoop is enclosed with equally spaced centering bracket base 7.
Described centering bracket base 7 is alternate is along its length furnished with centering bracket tab position 7-1 in prism-shaped and preformed hole 7-2.
Described 7-1 center, centering bracket tab position is provided with universal wheel mounting groove 5, and described universal wheel mounting groove 5 is by caving in hemispheric groove seat 5-1 and be positioned at groove lid 5-2 on described groove seat 5-1 and form.
The inner hollow out of described groove seat 5-1, described groove seat 5-1 and groove lid 5-2 are provided with reserved screw duct.
In described groove seat 5-1, be provided with universal wheel 6, described universal wheel 6 is that the little hard PVC medicine ball of 2.5mm forms by 1 diameter 14mm large hard PVC medicine ball and several diameters.
Described centering bracket base 7 axial spacing is 1m, and the salient point of described centering bracket base 7 engages with the groove of described corrugated protective conduits 4.
Described groove lid 5-2 is provided with colligation groove 7-3, and described colligation groove 7-3 is positioned at the both sides in described reserved screw duct.
Described preformed hole 7-2 is made up of two rectangular openings 8 and a racetrack annular aperture 9; Two rectangular openings 8 described in two and a racetrack annular aperture 9 alternate layout in the width direction, described racetrack annular aperture 9 is positioned in the middle of the rectangular opening 8 described in two.
The material of described centering bracket base 7 is rigid plastics, and described centering bracket base 7 is of a size of 360mm × 80mm × 2mm.
The height of described centering bracket tab position 7-1 is 19mm, and described rectangular opening 8 is of a size of 20mm × 5mm.
Specific construction engineering of the present invention: 1, anchor cable boring: before anchor cable construction, the position of holing according to construction drawing confirmation request anchor cable, direction, aperture and hole depth.After boring terminates, water pipe is stretched at the bottom of hole, by great deal running water, boring is rinsed.
2, anchor cable makes: the piece strappings such as grout pipe 1, steel strand 3 and isolation mount 2 are become a branch of, is loaded in corrugated protective conduits 4 after tying up.
3, install medium-height trestle: by mould, it is produced in batches.Be installed on by centering holder device (hoop parcel) outside corrugated protective conduits 4, centering bracket base 7 is 1.0m along anchor cable axial spacing.Centering bracket base 7 is engaged with corrugated protective conduits 4 groove by salient point, and carries out lashing by colligation groove 7-3, and when preventing anchor cable hand-hole, centering bracket base 7 and anchor cable body produce relative sliding.
4, anchor cable is installed: anchor cable is installed and adopted manual type to carry out, and will make full use of the little feature of universal wheel frictional resistance in propelling movement process, and after slowly at the uniform velocity advancing to ensure the installation of anchor cable body, it is still in straight state in boring.
5, grouting and prestressed stretch-draw: be in the milk after anchor cable installation, after grout cures, stretch-draw step by step carried out to the anchor cable being in straight state.
Above-mentioned unspecified part is prior art.
Claims (10)
1. an anchor cable centering holder device, is characterized in that: be positioned at the grout pipe (1) in centre, hoop is wrapped in the peripheral isolation mount (2) of described grout pipe (1) and is positioned at outer field corrugated protective conduits (4); On described isolation mount (2) inwall, the outer groove (2-1) of outwards depression is arranged at interval, and on described isolation mount (2) outer wall, the inner groovy (2-2) caved inward is arranged at interval; Described outer groove (2-1) and inner groovy (2-2) are all fixed with steel strand (3), described corrugated protective conduits (4) in cylinder and parcel described in isolation mount (2); On described corrugated protective conduits (4) outer wall, hoop is enclosed with equally spaced centering bracket base (7).
2. a kind of anchor cable centering holder device according to claim 1, is characterized in that: described centering bracket base (7) is alternate is along its length furnished with centering bracket tab position (7-1) in prism-shaped and preformed hole (7-2).
3. a kind of anchor cable centering holder device according to claim 1 and 2, it is characterized in that: described centering bracket tab position (7-1) center is provided with universal wheel mounting groove (5), described universal wheel mounting groove (5) is by caving in hemispheric groove seat (5-1) and be positioned at the upper groove lid (5-2) of described groove seat (5-1) and form.
4. a kind of anchor cable centering holder device according to claim 3, is characterized in that: described groove seat (5-1) inner hollow out, described groove seat (5-1) and groove lid (5-2) is provided with reserved screw duct.
5. a kind of anchor cable centering holder device according to claim 4, it is characterized in that: in described groove seat (5-1), be provided with universal wheel (6), described universal wheel (6) is that the little hard PVC medicine ball of 2.5mm forms by 1 diameter 14mm large hard PVC medicine ball and several diameters.
6. a kind of anchor cable centering holder device according to claim 4 or 5; it is characterized in that: described centering bracket base (7) axial spacing is 1m, the salient point of described centering bracket base (7) engages with the groove of described corrugated protective conduits (4).
7. a kind of anchor cable centering holder device according to claim 6, it is characterized in that: on described groove lid (5-2), be provided with colligation groove (7-3), described colligation groove (7-3) is positioned at the both sides in described reserved screw duct.
8. a kind of anchor cable centering holder device according to claim 2, is characterized in that: described preformed hole (7-2) is made up of two rectangular openings (8) and a racetrack annular aperture (9); Two rectangular openings (8) described in two and a racetrack annular aperture (9) alternate layout in the width direction, described racetrack annular aperture (9) is positioned in the middle of the rectangular opening (8) described in two.
9. a kind of anchor cable centering holder device according to claim 7, it is characterized in that: the material of described centering bracket base (7) is rigid plastics, described centering bracket base (7) is of a size of 360mm × 80mm × 2mm.
10. a kind of anchor cable centering holder device according to claim 8 or claim 9, it is characterized in that: the height of described centering bracket tab position (7-1) is 19mm, described rectangular opening (8) is of a size of 20mm × 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393401.2A CN104963339B (en) | 2015-07-07 | 2015-07-07 | A kind of anchor cable centering holder device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393401.2A CN104963339B (en) | 2015-07-07 | 2015-07-07 | A kind of anchor cable centering holder device |
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| CN104963339A true CN104963339A (en) | 2015-10-07 |
| CN104963339B CN104963339B (en) | 2017-08-11 |
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| CN201510393401.2A Active CN104963339B (en) | 2015-07-07 | 2015-07-07 | A kind of anchor cable centering holder device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105442597A (en) * | 2015-12-25 | 2016-03-30 | 中铁十四局集团第二工程有限公司 | Self-supercharging anchor cable and construction method thereof |
| CN105804076A (en) * | 2016-03-26 | 2016-07-27 | 安徽同济建设集团有限责任公司 | Pre-stressed anchor cable and foundation pit supporting pre-stressed anchor cable construction method |
| CN106638591A (en) * | 2016-12-14 | 2017-05-10 | 长江勘测规划设计研究有限责任公司 | Multi-layer nest and coaxial sequencing assembly type anchor cable construction and installation method |
| CN108505457A (en) * | 2018-04-16 | 2018-09-07 | 杭州屹方建筑科技有限公司 | A kind of method that steel flanged beam cemented rock arch bridge side wall is reinforced |
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| CN2284265Y (en) * | 1997-01-23 | 1998-06-17 | 北京市建筑工程研究院 | Non-sticking prestressing anchor tendon |
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| CN201268849Y (en) * | 2008-06-18 | 2009-07-08 | 中国葛洲坝集团股份有限公司 | External centering support of steel anchor rod |
| CN203050746U (en) * | 2013-02-21 | 2013-07-10 | 浙江普泰克金属制品有限公司 | Anchor rod centering machine |
| CN203062160U (en) * | 2013-01-17 | 2013-07-17 | 中建三局第二建设工程有限责任公司 | Centering bracket for anchor rod |
| CN204780899U (en) * | 2015-07-07 | 2015-11-18 | 长江勘测规划设计研究有限责任公司 | Anchor rope centering support device |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2284265Y (en) * | 1997-01-23 | 1998-06-17 | 北京市建筑工程研究院 | Non-sticking prestressing anchor tendon |
| CN2602163Y (en) * | 2002-11-25 | 2004-02-04 | 谢兵 | Anchor wire isolation rack |
| CN201268849Y (en) * | 2008-06-18 | 2009-07-08 | 中国葛洲坝集团股份有限公司 | External centering support of steel anchor rod |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105442597A (en) * | 2015-12-25 | 2016-03-30 | 中铁十四局集团第二工程有限公司 | Self-supercharging anchor cable and construction method thereof |
| CN105804076A (en) * | 2016-03-26 | 2016-07-27 | 安徽同济建设集团有限责任公司 | Pre-stressed anchor cable and foundation pit supporting pre-stressed anchor cable construction method |
| CN106638591A (en) * | 2016-12-14 | 2017-05-10 | 长江勘测规划设计研究有限责任公司 | Multi-layer nest and coaxial sequencing assembly type anchor cable construction and installation method |
| CN108505457A (en) * | 2018-04-16 | 2018-09-07 | 杭州屹方建筑科技有限公司 | A kind of method that steel flanged beam cemented rock arch bridge side wall is reinforced |
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| CN104963339B (en) | 2017-08-11 |
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