CN110644366A - Stay cable tensioning device for narrow anchoring space and operation method thereof - Google Patents
Stay cable tensioning device for narrow anchoring space and operation method thereof Download PDFInfo
- Publication number
- CN110644366A CN110644366A CN201910844338.8A CN201910844338A CN110644366A CN 110644366 A CN110644366 A CN 110644366A CN 201910844338 A CN201910844338 A CN 201910844338A CN 110644366 A CN110644366 A CN 110644366A
- Authority
- CN
- China
- Prior art keywords
- tension rod
- anchor cup
- hollow
- nut
- anchor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
Abstract
The invention discloses a stay cable tensioning device for a narrow anchoring space, which comprises an anchor cup, an anchor cup nut, a supporting leg, a jack, a tension rod, a hollow tension rod and a hollow tension rod nut, wherein the anchor cup is fixedly connected with the anchor cup; the anchor cup penetrates through the anchor backing plate and is fastened by an anchor cup nut; one end of the tension rod is fastened with an inner thread in the anchor cup, the other end of the tension rod is matched with the hollow tension rod, and a hollow tension rod nut is mounted on the hollow tension rod and used for fastening the tension rod; the radius cross-section of arm brace is L shape, and one end top of arm brace is on the anchor backing plate of anchor cup, the jack is between another long end and the hollow stretch-draw rod nut of arm brace. The invention solves the technical problem that the anchor cup can only be arranged in the brace in the conventional tensioning mode, and reduces the total assembly height of the whole set of tensioning device by reducing the height of the tensioning brace, thereby meeting the requirement of tensioning in the tower.
Description
Technical Field
The invention belongs to the technical field of bridge building construction, and particularly relates to a stay cable tensioning device for a narrow anchoring space and an operation method thereof.
Background
With the rapid development of bridge technology in China, the construction of cable-stayed bridges is more and more greatly influenced by external factors such as geographical environment and the like. Outside moulding pleasing to the eye, practical bridge construction, because of its special bridge structures cause the suspension cable anchor space narrow and small, can't adopt conventional equipment to carry out the symmetry stretch-draw. Based on the reason, the research on the tensioning method is accelerated, the tensioning method is developed towards the direction of specialization, and meanwhile, the whole level of the construction of the cable-stayed bridge is improved.
The main bridge of the highway bridge of the Hangzhou railway Changjiang river of the newly-built Shang Heng railway adopts an asymmetric high-low tower cable-stayed bridge arrangement, a main tower column is of a reinforced concrete structure, the outer contour of a bridge tower adopts a diamond-shaped main tower, a cable-tower anchoring structure adopts a steel anchor box structural type which is arranged in a lower chord side box of the main beam, and a cable-tower anchoring structure adopts a structural type of a steel anchor beam. Due to the reasons, the tension space in the tower is narrow, the existing equipment cannot be normally tensioned, and the equipment is developed and developed aiming at the stay cable tension equipment in the narrow anchoring space and belongs to the first case at home.
Disclosure of Invention
The invention provides a stay cable tensioning device for a narrow anchoring space and an operation method thereof, and aims to solve the problems that the stay cable anchoring space is narrow and cannot be symmetrically tensioned.
The technical scheme adopted by the invention is as follows: a stay cable tensioning device for a narrow anchoring space comprises an anchor cup, an anchor cup nut, a supporting leg, a jack, a tension rod, a hollow tension rod and a hollow tension rod nut; the anchor cup penetrates through the anchor backing plate and is fastened by an anchor cup nut; one end of the tension rod is fastened with an inner thread in the anchor cup, the other end of the tension rod is matched with the hollow tension rod, and a hollow tension rod nut is mounted on the hollow tension rod and used for fastening the tension rod; the radius cross-section of arm brace is L shape, and one end top of arm brace is on the anchor backing plate of anchor cup, the jack is between another long end and the hollow stretch-draw rod nut of arm brace.
Furthermore, the jack is a large-diameter jack, and the anchor cup penetrates through the large-diameter jack.
The invention also discloses an installation method of the device, which comprises the following steps:
firstly, the anchor cup is pulled out of the anchor backing plate through hard traction equipment, and an anchor cup nut is installed to be in a flat cap state.
And secondly, installing a tension rod on the screw thread in the anchor cup, and installing a hollow tension rod at the rear end of the tension rod.
And thirdly, assembling the tensioning supporting feet and the jack, and installing the hollow tensioning rod to be in a flat cap state.
And fourthly, supplying oil to the jack, extending the oil cylinder, pulling out the anchor cup through the hollow tension rod and the tension rod, and synchronously screwing the nut of the anchor cup.
And fifthly, after the jack cylinder reaches the maximum stroke, returning oil to enable the anchor cup nut to act on the anchor backing plate, screwing the hollow tension rod and the nut downwards at the same time, and enabling the hollow tension rod nut to act on the jack cylinder.
Sixthly, continuously supplying oil, and sequentially performing tensioning operation; when the hollow tension rod is abutted to the end part of the anchor cup, only the hollow tension rod nut is screwed downwards, and the hollow tension rod nut acts on the jack cylinder. And continuously tensioning to the target tonnage.
The invention has the beneficial effects that: because the invention adopts the jack with large diameter of penetration, the anchor cup can penetrate out of the inner hole of the jack. The device solves the technical problem that the anchor cup can only be arranged in the brace in the conventional tensioning mode, and the total assembly height of the whole set of tensioning device is reduced by reducing the height of the tensioning brace, so that the tensioning requirement in the tower is met; the combination mode of the solid tension rod and the hollow tension rod is adopted, the hollow tension rod is screwed downwards along with the pulling out of the anchor cup, and the total assembly height of the tension device is not increased.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
FIG. 1 is a schematic view of an initial stage of tensioning;
FIG. 2 is a schematic view of a first stage of tensioning;
FIG. 3 is a schematic view of a second stage of tensioning;
in the figure: 1-anchor cup, 2-anchor backing plate, 3-supporting foot, 4-anchor cup nut, 5-large-diameter-through jack, 6-tension rod, 7-hollow tension rod and 8-hollow tension rod nut.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained according to the drawings without inventive labor.
As shown in fig. 1 to 3, the invention comprises an anchor cup 1, an anchor backing plate 2, a supporting leg 3, an anchor cup nut 4, a large-diameter jack 5, a tension rod 6, a hollow tension rod 7 and a hollow tension rod nut 8. Wherein, the anchor cup 1 passes through the anchor backing plate 2 and is fastened by the anchor cup nut 4. One end of the tension rod 6 is fastened with the inner thread in the anchor cup 1, the other end of the tension rod 6 is matched with the hollow tension rod 7, and a hollow tension rod nut 8 is installed on the hollow tension rod 7 and used for fastening the tension rod 6. The radius section of the supporting foot 3 in the invention is L-shaped, one end of the supporting foot 3 is propped against the anchor backing plate 2 of the anchor cup 1, and the large-diameter jack 5 is propped between the other long end of the supporting foot 3 and the hollow tension rod nut 8.
The operation method of the invention is as follows, as shown in figure 1 and figure 2, the anchor cup is pulled out of the anchor backing plate 2 by the hard traction equipment, and the anchor cup nut 4 is screwed to the flat cap. According to the figure 1, a tension rod 6, a hollow tension rod 7, a supporting foot 3, a large-diameter jack 5 and a hollow tension rod nut 8 are respectively installed. When the tensioning is started, the hollow tensioning rod nut 8 acts on the oil cylinder of the large-diameter jack 5. And (3) supplying oil to the large-diameter jack 5, enabling the oil cylinder to pull the hollow tension rod nut 8, pulling out the stay cable anchor cup 1 through the hollow tension rod 7 and the tension rod 6, and synchronously screwing the anchor cup nut 4 to finish the stay cable tension. When the oil cylinder of the large-diameter jack 5 reaches the maximum stroke, oil returns to enable the anchor cup nut 4 to act on the anchor backing plate 2. And (3) screwing the hollow tension rod 7 and the nut 8 downwards simultaneously, wherein the hollow tension rod nut 8 acts on the oil cylinder of the large-diameter jack 5, and the tensioning operation is carried out in the same way.
As shown in figure 3, when the hollow tension rod 7 is abutted to the end of the anchor cup 1, only the hollow tension rod nut 8 is screwed downwards, and the hollow tension rod nut 8 acts on the jack cylinder. And continuously tensioning to the target tonnage.
The device for tensioning the stay cable in the narrow anchoring space has the remarkable characteristic that the method effectively solves the technical problems that the stay cable cannot be synchronously and symmetrically tensioned due to the narrow anchoring space. The large-diameter jack is adopted to ensure that the anchor cup can penetrate out of the inner hole of the jack, so that the height of the stretching brace is reduced. The tension rod and the hollow tension rod are combined, so that the height of the whole set of tension device is not increased along with the pulling out of the anchor cup in the tension process. The assembly height of the tensioning device is reduced to the maximum extent, and the device is suitable for the characteristic that the stay cable is free and small in anchoring.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. The utility model provides a suspension cable tensioning equipment for narrow and small anchor space which characterized in that: comprises an anchor cup, an anchor cup nut, a supporting leg, a jack, a tension rod, a hollow tension rod and a hollow tension rod nut; the anchor cup penetrates through the anchor backing plate and is fastened by an anchor cup nut; one end of the tension rod is fastened with an inner thread in the anchor cup, the other end of the tension rod is matched with the hollow tension rod, and a hollow tension rod nut is mounted on the hollow tension rod and used for fastening the tension rod; the radius cross-section of arm brace is L shape, and one end top of arm brace is on the anchor backing plate of anchor cup, the jack is between another long end and the hollow stretch-draw rod nut of arm brace.
2. A stay cable tension device for a small anchoring space according to claim 1, wherein: the jack is a large-diameter jack, and the anchor cup penetrates through the large-diameter jack.
3. A method for installing a stay cable tensioning device used in a narrow anchoring space is characterized by comprising the following steps:
firstly, pulling the anchor cup out of the anchor backing plate through hard traction equipment, and installing an anchor cup nut to be in a flat cap state;
secondly, installing a tension rod on the screw thread in the anchor cup, and installing a hollow tension rod at the rear end of the tension rod;
thirdly, assembling a stretching brace and a jack, and installing a hollow stretching rod to be in a flat cap state;
fourthly, supplying oil to the jack, extending the oil cylinder, pulling out the anchor cup through the hollow tension rod and the tension rod, and synchronously screwing the nut of the anchor cup;
fifthly, after the jack cylinder reaches the maximum stroke, returning oil to enable the anchor cup nut to act on the anchor backing plate, screwing the hollow tension rod and the nut downwards at the same time, and enabling the hollow tension rod nut to act on the jack cylinder;
sixthly, continuously supplying oil, and sequentially performing tensioning operation; when the hollow tension rod is abutted to the end part of the anchor cup, only the hollow tension rod nut is screwed downwards, and the hollow tension rod nut acts on the jack cylinder;
and continuously tensioning to the target tonnage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844338.8A CN110644366A (en) | 2019-09-06 | 2019-09-06 | Stay cable tensioning device for narrow anchoring space and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844338.8A CN110644366A (en) | 2019-09-06 | 2019-09-06 | Stay cable tensioning device for narrow anchoring space and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110644366A true CN110644366A (en) | 2020-01-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910844338.8A Pending CN110644366A (en) | 2019-09-06 | 2019-09-06 | Stay cable tensioning device for narrow anchoring space and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110644366A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235436A (en) * | 2021-04-28 | 2021-08-10 | 中交二航局第二工程有限公司 | Temporary inhaul cable construction method suitable for cable-first and beam-second construction of suspension bridge |
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| SU712505A1 (en) * | 1976-05-10 | 1980-01-30 | Московский Ордена Трудового Красного Знамени Горный Институт | Anchorage device |
| GB2136073A (en) * | 1983-03-01 | 1984-09-12 | Stronghold International Aktie | Hydraulic Jack for Stressing Elongate Elements |
| CA2035786C (en) * | 1990-03-31 | 2001-05-29 | Ernst F. Ischebeck | Indicator-nut threaded coupling with load-indicating device adapted to be arranged on anchors, in particular grouted anchors for mining or the like |
| CN102561205A (en) * | 2012-03-23 | 2012-07-11 | 河北益铁机电科技有限公司 | Tensioning system for T-shaped beams in transverse connection |
| CN102619171A (en) * | 2012-03-30 | 2012-08-01 | 中交二航局第四工程有限公司 | Loop bar connection type draw bar jack tension system |
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2019
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| CA2035786C (en) * | 1990-03-31 | 2001-05-29 | Ernst F. Ischebeck | Indicator-nut threaded coupling with load-indicating device adapted to be arranged on anchors, in particular grouted anchors for mining or the like |
| CN102561205A (en) * | 2012-03-23 | 2012-07-11 | 河北益铁机电科技有限公司 | Tensioning system for T-shaped beams in transverse connection |
| CN102619171A (en) * | 2012-03-30 | 2012-08-01 | 中交二航局第四工程有限公司 | Loop bar connection type draw bar jack tension system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235436A (en) * | 2021-04-28 | 2021-08-10 | 中交二航局第二工程有限公司 | Temporary inhaul cable construction method suitable for cable-first and beam-second construction of suspension bridge |
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Application publication date: 20200103 |