CN111119489B - Method for tensioning stay cable - Google Patents
Method for tensioning stay cable Download PDFInfo
- Publication number
- CN111119489B CN111119489B CN201911346462.8A CN201911346462A CN111119489B CN 111119489 B CN111119489 B CN 111119489B CN 201911346462 A CN201911346462 A CN 201911346462A CN 111119489 B CN111119489 B CN 111119489B
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- tensioning
- jack
- supporting leg
- pull rod
- screwing
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- 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
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- 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
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- 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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The tensioning method of the inhaul cable comprises the following steps: the stay cable penetrates out of the cable guide pipe, and the anchor ring is screwed into the anchor cup; screwing the assembled tensioning short pull rod and the compensating core into a tensioning thread of the anchor cup; the inner supporting leg, the outer supporting leg and the jack are screwed in place; connecting the assembled inner supporting leg, the assembled outer supporting leg and the jack with a tensioning nut; operating a jack to stretch, screwing the anchor ring, returning the jack, adjusting the screwing length of the inner supporting leg, the outer supporting leg and the jack, and screwing a tensioning nut to finish one-time stretching; and repeating the operation until the tensioning is completed. The tensioning method of the inhaul cable can be used when the tensioning space is insufficient.
Description
Technical Field
The invention belongs to the field of building engineering, and particularly relates to a tensioning method in a cable structure construction process.
Background
Cable structure buildings have been in use for many years, and some cables have been detected, maintained, and even replaced. Because the stay cable is an important stressed member in a building structure, the cable force of the stay cable needs to be accurately measured, the cable force can not change due to replacement and is an important mark for successful cable replacement, and the stay cable needs to be tensioned in order to ensure the success of a looped cable. However, the tensioning space at the rear end of the cable anchor head is not considered in some structures, so that tensioning work cannot be performed by adopting the conventional tensioning equipment and tensioning method.
Disclosure of Invention
The invention aims to provide a method for tensioning a stay cable, which can be used when a tensioning space is insufficient.
The tensioning method of the inhaul cable comprises the following steps:
1) the stay cable penetrates out of the cable guide pipe, and the anchor ring is screwed into the anchor cup;
2) screwing the assembled tensioning short pull rod and the compensating core into a tensioning thread of the anchor cup;
3) the inner supporting leg, the outer supporting leg and the jack are screwed in place;
4) connecting the assembled inner supporting leg, the assembled outer supporting leg and the jack with a tensioning nut;
5) operating a jack to stretch, screwing the anchor ring, returning the jack, adjusting the screwing length of the inner supporting leg, the outer supporting leg and the jack, and screwing a tensioning nut to finish one-time stretching;
6) and repeating the operation step 5) until the tensioning is finished.
The tensioning method of the inhaul cable comprises the step 1), wherein the anchor cup is provided with external threads, the anchor ring is provided with internal threads, and the anchor ring is in threaded connection with the anchor cup.
The tensioning method of the inhaul cable comprises the step 2), wherein the outer surfaces of the upper part and the lower part of the tensioning short pull rod are respectively provided with an external thread, the tensioning thread of the anchor cup is an internal thread, the upper part of the tensioning short pull rod is in threaded connection with the compensating core, and the compensating core is in threaded connection with the anchor cup.
The tensioning method of the inhaul cable comprises the step 3), wherein the outer supporting foot is provided with an internal thread, the inner supporting foot is provided with an external thread and an internal thread, the jack is provided with an external thread and a central inner hole, the inner supporting foot is in threaded connection with the outer supporting foot, and the jack is in threaded connection with the inner supporting foot.
In the step 4), when the tensioning nut is installed, the lower end of the tensioning short pull rod is firstly stretched into the assembled inner supporting foot, the assembled outer supporting foot and the assembled jack, the lower end of the tensioning short pull rod penetrates through a central inner hole of the jack, and then the tensioning nut is connected to the outer surface of the lower part of the tensioning short pull rod in a threaded mode.
Compared with the prior art, the tensioning method of the inhaul cable is different in that the tensioning method of the inhaul cable utilizes the jack and the tensioning short pull rod to provide tensioning force for the inhaul cable, the inhaul cable can be tensioned for many times in a small amount until the inhaul cable force requirement is met, the required tensioning space is small, and the tensioning method of the inhaul cable is suitable for tensioning the inhaul cable when the tensioning space is insufficient.
The method for tensioning the stay cable of the invention is further explained below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view showing an initial state of tension of a cable by a tension method of the cable according to the present invention;
fig. 2 is a schematic view of a final state of tension of the cable by the tension method of the cable of the present invention.
Detailed Description
As shown in fig. 1 and 2, the method for tensioning the stay cable of the invention comprises the following steps:
1) the inhaul cable 7 penetrates out of the cable guide pipe 8, and the anchor ring 10 is screwed into the anchor cup 9; wherein the anchor cup 9 is provided with an external thread, the anchor ring 10 is provided with an internal thread, and the anchor ring 10 is in threaded connection with the anchor cup 9.
2) Screwing the assembled tensioning short pull rod 5 and the bushing 4 into a tensioning thread of the anchor cup 9, and connecting the upper end of the tensioning short pull rod 5 with a stay cable 7; wherein, the outer surfaces of the upper part and the lower part of the tensioning short pull rod 5 are both provided with external threads, the tensioning thread of the anchor cup 9 is an internal thread, the upper part of the tensioning short pull rod 5 is in threaded connection with the patch core 4, and the patch core 4 is in threaded connection with the anchor cup 9.
3) The inner supporting leg 2, the outer supporting leg 1 and the jack 3 are screwed in place; outer arm-brace 1 has the internal thread, and interior arm-brace 2 has external screw thread and internal thread, and jack 3 adopts the straight-through jack, has external screw thread and central hole, and interior arm- brace 2 and 1 threaded connection of outer arm-brace, jack 3 and 2 threaded connection of interior arm-brace. The criteria for screw-in-place are: the upper end surface of the outer supporting leg 1 is contacted with the lower end surface of the anchor plate 11, the inner supporting leg 2 is screwed into the outer supporting leg 1 to the deepest, the center-penetrating jack 3 is screwed into the inner supporting leg 2 to the deepest, and the shortest overall height of the inner supporting leg 2, the outer supporting leg 1 and the jack 3 is ensured.
4) Connecting the inner supporting leg 2, the outer supporting leg 1 and the jack 3 which are assembled and screwed in place with a tensioning nut 6, and screwing the tensioning nut 6 to ensure that the upper end surface of the tensioning nut 6 is tightly attached to the lower end surface of the jack 3; when the tensioning nut 6 is installed, the lower end of the tensioning short pull rod 5 firstly extends into the assembled inner supporting leg 2, the assembled outer supporting leg 1 and the assembled jack 3, at the moment, the lower end of the tensioning short pull rod 5 penetrates through a central inner hole of the jack 3, and then the tensioning nut 6 is in threaded connection with the outer surface of the lower part of the tensioning short pull rod 5.
5) Operating the jack 3 for tensioning, screwing the anchor ring 10, returning the jack 3, adjusting the screwing length of the inner supporting leg 2, the outer supporting leg 1 and the jack 3, and screwing the tensioning nut 6 to finish one-time tensioning;
6) and repeating the operation step 5) until the tensioning is finished.
Referring to fig. 1 and 2, during tensioning, a piston of a jack 3 drives a tensioning nut 6 and a tensioning short pull rod 5 to move downwards to tension a cable 7, at the moment, the upper end surface of an anchor ring 10 is separated from the lower end surface of an anchor plate 11, the jack 3 returns, then the anchor ring 10 is screwed to enable the upper end surface of the anchor ring 10 to be in contact with the lower end surface of the anchor plate 11, the upper end surface of an outer supporting leg 1 is in contact with the lower end surface of the anchor plate 11, the tensioning nut 6 is screwed to enable the upper end surface of the tensioning nut 6 to be tightly attached to the lower end surface of the jack 3, a center-penetrating jack 3 is started to continue to tension the cable, and the cable needs to be repeatedly tensioned due to the adoption of a small-stroke tensioning jack 3, the occupied space is small, the cable can be tensioned when the tensioning space is insufficient, and detection, maintenance and replacement of the cable are realized.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (4)
1. A tensioning method of a stay cable is characterized by comprising the following steps:
1) the inhaul cable (7) penetrates out of the cable guide pipe (8), and the anchor ring (10) is screwed into the anchor cup (9);
2) screwing the assembled tensioning short pull rod (5) and the compensating core (4) into a tensioning thread of the anchor cup (9);
3) the inner supporting leg (2), the outer supporting leg (1) and the jack (3) are screwed in place;
4) will assemble interior vaulting pole (2), external stay foot (1) and jack (3) after and be connected with stretch-draw nut (6): when the tensioning nut (6) is installed, the lower end of the tensioning short pull rod (5) is firstly stretched into the assembled inner supporting foot (2), the assembled outer supporting foot (1) and the assembled jack (3), at the moment, the lower end of the tensioning short pull rod (5) penetrates through a central inner hole of the jack (3), and then the tensioning nut (6) is connected to the outer surface of the lower part of the tensioning short pull rod in a threaded mode;
5) operating the jack (3) to stretch, screwing the anchor ring (10), returning the jack (3), adjusting the screwing length of the inner supporting leg (2), the outer supporting leg (1) and the jack (3), and screwing the tensioning nut (6) to finish one-time tensioning;
6) and repeating the operation step 5) until the tensioning is finished.
2. A tension method of a tension cable according to claim 1, characterized in that: in the step 1), the anchor cup (9) is provided with external threads, the anchor ring (10) is provided with internal threads, and the anchor ring (10) is in threaded connection with the anchor cup (9).
3. A tension method of a tension cable according to claim 2, characterized in that: in the step 2), external threads are arranged on the outer surfaces of the upper part and the lower part of the tensioning short pull rod (5), the tensioning threads of the anchor cup (9) are internal threads, the upper part of the tensioning short pull rod (5) is in threaded connection with the supplement core (4), and the supplement core (4) is in threaded connection with the anchor cup (9).
4. A tension method of a tension cable according to claim 3, characterized in that: in the step 3), the outer supporting leg (1) is provided with an internal thread, the inner supporting leg (2) is provided with an external thread and an internal thread, the jack (3) is provided with an external thread and a central inner hole, the inner supporting leg (2) is in threaded connection with the outer supporting leg (1), and the jack (3) is in threaded connection with the inner supporting leg (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911346462.8A CN111119489B (en) | 2019-12-24 | 2019-12-24 | Method for tensioning stay cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911346462.8A CN111119489B (en) | 2019-12-24 | 2019-12-24 | Method for tensioning stay cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111119489A CN111119489A (en) | 2020-05-08 |
| CN111119489B true CN111119489B (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911346462.8A Active CN111119489B (en) | 2019-12-24 | 2019-12-24 | Method for tensioning stay cable |
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| Country | Link |
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| CN (1) | CN111119489B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526685B (en) * | 2022-02-15 | 2023-06-13 | 柳州欧维姆机械股份有限公司 | Replaceable fiber bragg grating intelligent inhaul cable and replacement method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2615422A1 (en) * | 1987-05-22 | 1988-11-25 | Bielecki Stanislas | Device for tensioning prestressing cables, stays, hawsers, or for moving heavy loads |
| US5316509A (en) * | 1991-09-27 | 1994-05-31 | Sofec, Inc. | Disconnectable mooring system |
| CN2642760Y (en) * | 2003-08-04 | 2004-09-22 | 许国智 | Improved screw-type support executing device |
| CN202787077U (en) * | 2012-03-30 | 2013-03-13 | 中交二航局第四工程有限公司 | Sleeve rod connection type pull bar jack tensioning system |
| CN203794944U (en) * | 2013-12-31 | 2014-08-27 | 上海浦江缆索股份有限公司 | Stay rope circular tensioning device |
| CN109137733B (en) * | 2018-08-14 | 2020-06-09 | 中铁大桥局集团有限公司 | Tensioning support device and tensioning method of low-retraction anchor |
| CN210289184U (en) * | 2019-06-27 | 2020-04-10 | 巨力索具股份有限公司 | Adjustable jack brace stretching equipment |
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2019
- 2019-12-24 CN CN201911346462.8A patent/CN111119489B/en active Active
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| CN111119489A (en) | 2020-05-08 |
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