CN108660907B - Stay cable force overstretching structure - Google Patents
Stay cable force overstretching structure Download PDFInfo
- Publication number
- CN108660907B CN108660907B CN201810611629.8A CN201810611629A CN108660907B CN 108660907 B CN108660907 B CN 108660907B CN 201810611629 A CN201810611629 A CN 201810611629A CN 108660907 B CN108660907 B CN 108660907B
- Authority
- CN
- China
- Prior art keywords
- stay cable
- anchor
- jack
- arc panel
- adjusting nut
- Prior art date
- 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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Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000005192 partition Methods 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a stay cable force overstretching and expanding structure, which is characterized in that: the novel steel box girder middle partition wall saw tooth block concrete box girder comprises a guide pipe (1) which is embedded in a box girder middle partition wall saw tooth block concrete (2), when a section stay cable is stretched, an anchor cylinder (3) stretches into the guide pipe (1), and a guide pipe anchor plate (4), a working anchor (5) and an adjusting nut (15) are clung to each other in a seamless mode through stay cable stretching force. Before the stay cable is overstretched, whether the connecting bolt (6) of the anti-loosening device is screwed is confirmed. In the stay cable overstretching and releasing tensioning process, a fastener type bracket platform is erected under the box girder middle partition wall sawtooth block concrete (2), and a steel support tensioning pedestal (7) is fixed above an operation platform by adopting a chain block. After the steel support tensioning pedestal (7) is installed, a through jack (8), a tool anchor (9) and an oil pump are installed. The auxiliary hanging frame and the hand hoist are adopted to lift and mount the through jack (8), so that the jack (8) is required to be opposite to the steel support stretching pedestal (7).
Description
Technical Field
The invention relates to a stay cable force super-tension releasing structure.
Background
The main channel bridge of the middle-iron large channel is a 'Lusheng' modeling cable-stayed bridge, in order to better optimize the line shape and the upper and lower edge stress of the bridge construction stage and improve the service life of the bridge, the design requires that each stay cable force is temporarily tensioned to 0.46fpk of the stay cable force by adopting a single top before closure of the cable-stayed bridge, the stay cable force is overstretched to 0.65fpk by adopting an overstretch structure before closure of the closure section, the stay cable force is continuously overstretched to 0.72fpk after the conversion of a full-bridge prestress system is completed, and then the stay cable force is released to 0.56fpk by adopting an overstretch structure, so that the optimization of the line shape of the full-bridge and the upper and lower edge stress of a box girder is realized. The traditional front clamping type single-pull-out jack is required to realize the stay cable force super-tension-release adjustment, the construction operation difficulty is high, the economic benefit is low, and the stay cable PE epoxy coating steel strand is easy to damage due to the single-pull-out jack adjustment, so that the stay cable force super-tension-release structure is developed.
Disclosure of Invention
The invention aims to solve the technical problems that: the stay cable force overstretched structure is provided, compared with a traditional method for adjusting the cable force by a single top, the cable force is released by twisting an adjusting nut by the single top, and then the design value of Zhang Ladao cable force is adopted for each steel strand one by the single top, so that the difficulty of twisting the adjusting nut is high, the adjusting progress is slow and the effect is poor. The stay cable force overstretch structure disclosed by the invention realizes that the whole bundle of steel strands of the stay cable are overstretched and stretched simultaneously, the adjusting nut is easy to twist clockwise or anticlockwise, and the stay cable force adjustment progress is improved. The anti-loosening device in the stay cable force overstretching structure solves the problem that the positions of the clamping pieces and the steel strands are unchanged when the steel strands are under the overstretching or stretching working condition, and effectively prevents the steel strands from being damaged by clamping the working clamping pieces.
The technical scheme of the invention is as follows: the utility model provides a stay cable force overstretch structure, it includes stand pipe, partition wall tooth piece concrete, anchor section of thick bamboo, stand pipe anchor plate work anchor and adjusting nut, the stand pipe is pre-buried in box girder mid-partition wall tooth piece concrete, anchor section of thick bamboo sets up in the stand pipe, stand pipe one end installs the stand pipe anchor plate in proper order, adjusting nut and work anchor, partition wall tooth piece concrete sets up the fixed steel of adjusting nut one side and props stretch-draw pedestal, the jack is connected to the steel of stretching-draw pedestal other end, the tool anchor is connected to the jack other end.
The anti-loose device is connected with the flange plate and the anchoring cylinder through a connecting bolt, and the adjusting hole is used for adjusting the nut to rotate up and down.
The guide pipe is welded, and the welding seam grade meets the requirement of a secondary welding seam.
The steel support stretching pedestal consists of a circular upper top plate, a left circular arc panel, a right circular arc panel and a triangular lacing plate, wherein the left circular arc panel and the right circular arc panel are respectively connected below the circular upper top plate, and the triangular lacing plate is respectively welded at the joint of the circular upper top plate and the left circular arc panel and the right circular arc panel.
The steel support tensioning pedestal is connected with the box girder intermediate wall tooth block through the left arc panel and the right arc panel respectively.
And the steel support tensioning pedestal is processed by using Q235 steel plates.
The steel support stretching pedestal is provided with a round hole with the diameter of 20cm at the center of the round upper top plate.
The jack is a hydraulic through jack.
And a bracket is erected below the overstretching and stretching structure, and a hand hoist is adopted to fix the overstretching and stretching structure device. When the jack is in overstretched state, the jack cylinder piston stretches out, the adjusting nut is separated from the guide pipe anchor plate, the gap of the adjusting nut is enlarged, and the adjusting nut is twisted clockwise, so that the adjusting nut anchors the stay cable. When the stay cable is put to be stretched, the stay cable is firstly overturned, the adjusting nut is separated from the guide pipe anchor plate, the gap between the adjusting nut and the guide pipe is enlarged by twisting the adjusting nut anticlockwise, the jack cylinder piston is retracted, and after the adjusting nut is adjusted to the tension value of the stay cable, the adjusting nut is twisted clockwise to enable the adjusting nut to be clung to the guide pipe anchor plate, so that the stay cable is anchored.
The beneficial effects of the invention are as follows:
1. the steel support tensioning pedestal, the penetrating jack, the adjusting nut, the working anchor and the tool anchor are combined into the structural device to carry out overstretch and tension cable force adjustment on the stay cable, so that the defects of large difficulty in single-top adjustment of the stay cable force and low cable force adjustment benefit caused by screwing the adjusting nut are avoided, the operation safety of overstretch and tension cable force adjustment accuracy of the stay cable are better ensured, and good economic benefit is created.
2. The installation of the anti-loosening device ensures that the positions of the clamping pieces and the steel strand are absolutely unchanged no matter the steel strand is overstretched or is stretched, prevents the steel strand from being damaged by the working clamping pieces, and effectively ensures the service life of the steel strand.
Drawings
FIG. 1 is an overall schematic diagram of the present invention prior to overdrawing;
FIG. 2 is an overall schematic diagram of the overdrawing process of the present invention;
FIG. 3 is a schematic plan view of a steel support tensioning pedestal structure I-I; II-II plane projection diagram;
III-III plane projection diagram; IV-IV section view;
fig. 4 is a detailed view of the locking device.
Detailed Description
The stay cable force overstretch structure comprises a guide pipe 1, a partition wall tooth block concrete 2, an anchor cylinder 3, a guide pipe anchor plate 4 working anchor 5 and an adjusting nut 15, wherein the guide pipe 1 is embedded in the box girder middle partition wall tooth block concrete 2, the anchor cylinder 3 is arranged in the guide pipe 1, one end of the guide pipe 1 is sequentially provided with the guide pipe anchor plate 4, the adjusting nut 15 and the working anchor 5, one side of the partition wall tooth block concrete 2 provided with the adjusting nut 15 is fixedly provided with a steel support tensioning pedestal 7, the other end of the steel support tensioning pedestal 7 is connected with a jack 8, and the other end of the jack 8 is connected with a tool anchor 9; the anti-loose device is connected with the anchoring cylinder 3 through a connecting bolt 6 and a flange 19, and an adjusting hole 18 is used for adjusting the nut to rotate up and down; the guide pipe 1 is welded, and the welding seam grade meets the requirement of a secondary welding seam; the steel support tensioning pedestal 7 consists of a circular upper top plate 10, a left circular arc panel 11, a right circular arc panel 12 and a triangular lacing plate 13, wherein the left circular arc panel 11 and the right circular arc panel 12 are respectively connected below the circular upper top plate 10, and the triangular lacing plate 13 is respectively welded at the joint of the circular upper top plate 10 and the left circular arc panel 11 and the right circular arc panel 12; the steel support tensioning pedestal 7 is connected with the box girder intermediate wall tooth block concrete 2 through a left arc panel 11 and a right arc panel 12 respectively; the steel support tensioning pedestal 7 is processed by using Q235 steel plates; the center of the circular upper top plate of the steel support stretching pedestal 7 is provided with a round hole 14 with the diameter of 20 cm; the jack 8 is a hydraulic through jack.
Embodiments of the invention: the guide pipe 1 is pre-buried in the box girder intermediate wall tooth piece concrete 2, and during the section stay cable stretch-draw construction, anchor section of thick bamboo 3 stretches into in the guide pipe 1, makes guide pipe anchor plate 4, work anchor 5 and adjusting nut 15 hug closely seamless through stay cable tension. Before the stay cable is overstretched, whether the connecting bolt 6 of the anti-loosening device is screwed is confirmed. In the stay cable overstretching and releasing tensioning process, a bracket platform is erected under the gear block concrete 2 of the middle partition wall of the box girder, and a steel support tensioning pedestal 7 is fixed above an operation platform by adopting a chain block. After the steel support tensioning pedestal 7 is installed, the through jack 8, the tool anchor 9 and the oil pump are continuously installed. The auxiliary hanging frame and the hand hoist are adopted to lift and mount the penetrating type jack, so that the jack 8 is required to be opposite to the steel support stretching pedestal 7. When the jack is overstretched, the jack cylinder piston stretches out, the adjusting nut 15 is separated from the guide tube anchor plate 4, a gap of the adjusting nut is enlarged, the adjusting nut 15 is twisted clockwise, and the adjusting nut 15 is anchored to the stay cable. When the stay cable is put to be stretched, the stay cable is firstly overturned, the adjusting nut 15 is separated from the guide pipe anchor plate 4, the gap between the adjusting nut 15 and the guide pipe anchor plate 4 is enlarged by twisting the adjusting nut 15 anticlockwise, the jack cylinder piston is retracted, and after the jack cylinder piston is adjusted to a tension value, the adjusting nut 15 is twisted clockwise to be tightly attached to the guide pipe anchor plate 4 so as to realize the anchoring of the stay cable.
Claims (5)
1. The utility model provides a stay cable force exceeds and opens structure which characterized in that: it includes stand pipe (1), partition wall tooth piece concrete (2), anchor cylinder (3), stand pipe anchor plate (4) work anchor (5) and adjusting nut (15), stand pipe (1) pre-buried in case roof beam mid wall tooth piece concrete (2), anchor cylinder (3) set up in stand pipe (1), stand pipe (1) one end installs stand pipe anchor plate (4) in proper order, adjusting nut (15) and work anchor (5), one side that partition wall tooth piece concrete (2) set up adjusting nut (15) is fixed to set up steel brace tensioning pedestal (7), steel brace tensioning pedestal (7) constitute by circular roof plate (10), left side circular arc panel (11), right side circular arc panel (12) and triangle-shaped batten (13), connect left side circular arc panel (11) and right side circular arc panel (12) respectively in the below of circular roof plate (10), triangle-shaped batten (13) weld respectively in the junction of circular roof plate (10) and left side circular arc panel (11) and right side circular arc panel tensioning panel (12), steel brace tensioning pedestal (7) is connected with steel brace (8) in the other end of the circular roof plate (10) through circular arc panel (11), the other end of the jack (8) is connected with a tool anchor (9), the anti-loosening device is connected with the anchoring cylinder (3) through a connecting bolt (6) and a flange plate (19), and the adjusting hole (18) is an adjusting nut which rotates up and down.
2. The stay cable force overstretch structure of claim 1, wherein: the guide pipe (1) is welded, and the welding seam grade meets the requirement of a secondary welding seam.
3. The stay cable force overstretch structure of claim 1, wherein: and the steel support tensioning pedestal (7) is processed by using Q235 steel plates.
4. The stay cable force overstretch structure of claim 1, wherein: the center of the circular upper top plate of the steel support stretching pedestal (7) is provided with a round hole (14) with the diameter of 20 cm.
5. The stay cable force overstretch structure of claim 1, wherein: the jack (8) is a hydraulic through jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810611629.8A CN108660907B (en) | 2018-06-14 | 2018-06-14 | Stay cable force overstretching structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810611629.8A CN108660907B (en) | 2018-06-14 | 2018-06-14 | Stay cable force overstretching structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108660907A CN108660907A (en) | 2018-10-16 |
| CN108660907B true CN108660907B (en) | 2024-02-23 |
Family
ID=63774715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810611629.8A Active CN108660907B (en) | 2018-06-14 | 2018-06-14 | Stay cable force overstretching structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108660907B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673095B (en) * | 2022-05-05 | 2024-05-03 | 中交一公局集团有限公司 | Stay cable tensioning anti-torsion jack for space special-shaped |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200978388Y (en) * | 2006-12-06 | 2007-11-21 | 江阴法尔胜住电新材料有限公司 | Steel strand inclined dragline force conversion device |
| CN104099874A (en) * | 2014-07-28 | 2014-10-15 | 上海市城市建设设计研究总院 | Steel strand inhaul cable tension construction method by taking slip-resistant stud as locking device |
| CN106049282A (en) * | 2016-06-05 | 2016-10-26 | 中交路桥建设有限公司 | Method for tensioning and releasing hollow slab steel strands prefabricated through pre-tensioning method |
| CN208440966U (en) * | 2018-06-14 | 2019-01-29 | 中铁贵州旅游文化发展有限公司 | A kind of stay cable force super puts a structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100969005B1 (en) * | 2009-11-06 | 2010-07-09 | 동아대학교 산학협력단 | Constructing method of suspension bridge and temporary cable therefor |
-
2018
- 2018-06-14 CN CN201810611629.8A patent/CN108660907B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200978388Y (en) * | 2006-12-06 | 2007-11-21 | 江阴法尔胜住电新材料有限公司 | Steel strand inclined dragline force conversion device |
| CN104099874A (en) * | 2014-07-28 | 2014-10-15 | 上海市城市建设设计研究总院 | Steel strand inhaul cable tension construction method by taking slip-resistant stud as locking device |
| CN106049282A (en) * | 2016-06-05 | 2016-10-26 | 中交路桥建设有限公司 | Method for tensioning and releasing hollow slab steel strands prefabricated through pre-tensioning method |
| CN208440966U (en) * | 2018-06-14 | 2019-01-29 | 中铁贵州旅游文化发展有限公司 | A kind of stay cable force super puts a structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108660907A (en) | 2018-10-16 |
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